2:09 p.m.
I have been testing Ganesha 2.5.4 code with default mdcache settings. It
starts showing issues after prolonged I/O runs.
Once it exhausts all the allowed fds, its kind of gets stuck
returning ERR_FSAL_DELAY for every client op.
A snapshot of the mdcache
open_fd_count = 4055
lru_state = {
entries_hiwat = 100000,
entries_used = 323,
chunks_hiwat = 100000,
chunks_used = 9,
fds_system_imposed = 4096,
fds_hard_limit = 4055,
fds_hiwat = 3686,
fds_lowat = 2048,
futility = 109,
per_lane_work = 50,
biggest_window = 1638,
prev_fd_count = 4055,
prev_time = 1529013538,
fd_state = 3
}
[cache_lru] lru_run :INODE LRU :INFO :After work, open_fd_count:4055
entries used count:327 fdrate:0 threadwait=9
[cache_lru] lru_run :INODE LRU :INFO :lru entries: 327 open_fd_count:4055
[cache_lru] lru_run :INODE LRU :INFO :lru entries: 327open_fd_count:4055
[cache_lru] lru_run :INODE LRU :INFO :After work, open_fd_count:4055
entries used count:327 fdrate:0 threadwait=90
I have killed the NFS clients, so no new I/O is being received. But even
after a couple of hours I don't see lru_run making any progress, thereby
open_fd_count remains a 4055 and even a single file open won't be served.
So basically the server is in stuck state.
I have these changes patched over 2.5.4 code
e2156ad3feac841487ba89969769bf765457ea6e Replace cache_fds parameter and
handling with better logic
667083fe395ddbb4aa14b7bbe7e15ffca87e3b0b MDCACHE - Change and lower
futility message
37732e61985d919e6ca84dfa7b4a84163080abae Move open_fd_count from MDCACHE to
FSALs (https://review.gerrithub.io/#/c/391267/)
Any suggestions how to resolve this ?
7:41 a.m.
New subject: [Nfs-ganesha-devel] Re: V2.5.4: lru_run won't progress, open_fd_count exhausted
Try this one:
5c2efa8f077fafa82023f5aec5e2c474c5ed2fdf Fix closing global file descriptors
Daniel
On 06/15/2018 03:08 PM, bharat singh wrote:
I have been testing Ganesha 2.5.4 code with default mdcache settings.
It
starts showing issues after prolonged I/O runs.
Once it exhausts all the allowed fds, its kind of gets stuck
returning ERR_FSAL_DELAY for every client op.
A snapshot of the mdcache
open_fd_count = 4055
lru_state = {
entries_hiwat = 100000,
entries_used = 323,
chunks_hiwat = 100000,
chunks_used = 9,
fds_system_imposed = 4096,
fds_hard_limit = 4055,
fds_hiwat = 3686,
fds_lowat = 2048,
futility = 109,
per_lane_work = 50,
biggest_window = 1638,
prev_fd_count = 4055,
prev_time = 1529013538,
fd_state = 3
}
[cache_lru] lru_run :INODE LRU :INFO :After work, open_fd_count:4055
entries used count:327 fdrate:0 threadwait=9
[cache_lru] lru_run :INODE LRU :INFO :lru entries: 327 open_fd_count:4055
[cache_lru] lru_run :INODE LRU :INFO :lru entries: 327open_fd_count:4055
[cache_lru] lru_run :INODE LRU :INFO :After work, open_fd_count:4055
entries used count:327 fdrate:0 threadwait=90
I have killed the NFS clients, so no new I/O is being received. But even
after a couple of hours I don't see lru_run making any progress, thereby
open_fd_count remains a 4055 and even a single file open won't be
served. So basically the server is in stuck state.
I have these changes patched over 2.5.4 code
e2156ad3feac841487ba89969769bf765457ea6e Replace cache_fds parameter and
handling with better logic
667083fe395ddbb4aa14b7bbe7e15ffca87e3b0b MDCACHE - Change and lower
futility message
37732e61985d919e6ca84dfa7b4a84163080abae Move open_fd_count from MDCACHE
to FSALs (https://review.gerrithub.io/#/c/391267/)
Any suggestions how to resolve this ?
_______________________________________________
Devel mailing list -- devel(a)lists.nfs-ganesha.org
To unsubscribe send an email to devel-leave(a)lists.nfs-ganesha.org
9 a.m.
New subject: [Nfs-ganesha-devel] Re: V2.5.4: lru_run won't progress, open_fd_count exhausted
I already have this patch
c2b448b1a079ed66446060a695e4dd06d1c3d1c2 Fix closing global file descriptors
On Mon, Jun 18, 2018 at 5:41 AM Daniel Gryniewicz <dang(a)redhat.com> wrote:
Try this one:
5c2efa8f077fafa82023f5aec5e2c474c5ed2fdf Fix closing global file
descriptors
Daniel
On 06/15/2018 03:08 PM, bharat singh wrote:
> I have been testing Ganesha 2.5.4 code with default mdcache settings. It
> starts showing issues after prolonged I/O runs.
> Once it exhausts all the allowed fds, its kind of gets stuck
> returning ERR_FSAL_DELAY for every client op.
>
> A snapshot of the mdcache
>
> open_fd_count = 4055
> lru_state = {
> entries_hiwat = 100000,
> entries_used = 323,
> chunks_hiwat = 100000,
> chunks_used = 9,
> fds_system_imposed = 4096,
> fds_hard_limit = 4055,
> fds_hiwat = 3686,
> fds_lowat = 2048,
> futility = 109,
> per_lane_work = 50,
> biggest_window = 1638,
> prev_fd_count = 4055,
> prev_time = 1529013538,
> fd_state = 3
> }
>
> [cache_lru] lru_run :INODE LRU :INFO :After work, open_fd_count:4055
> entries used count:327 fdrate:0 threadwait=9
> [cache_lru] lru_run :INODE LRU :INFO :lru entries: 327 open_fd_count:4055
> [cache_lru] lru_run :INODE LRU :INFO :lru entries: 327open_fd_count:4055
> [cache_lru] lru_run :INODE LRU :INFO :After work, open_fd_count:4055
> entries used count:327 fdrate:0 threadwait=90
>
> I have killed the NFS clients, so no new I/O is being received. But even
> after a couple of hours I don't see lru_run making any progress, thereby
> open_fd_count remains a 4055 and even a single file open won't be
> served. So basically the server is in stuck state.
>
> I have these changes patched over 2.5.4 code
> e2156ad3feac841487ba89969769bf765457ea6e Replace cache_fds parameter and
> handling with better logic
> 667083fe395ddbb4aa14b7bbe7e15ffca87e3b0b MDCACHE - Change and lower
> futility message
> 37732e61985d919e6ca84dfa7b4a84163080abae Move open_fd_count from MDCACHE
> to FSALs (https://review.gerrithub.io/#/c/391267/)
>
> Any suggestions how to resolve this ?
>
>
>
>
> _______________________________________________
> Devel mailing list -- devel(a)lists.nfs-ganesha.org
> To unsubscribe send an email to devel-leave(a)lists.nfs-ganesha.org
>
_______________________________________________
Devel mailing list -- devel(a)lists.nfs-ganesha.org
To unsubscribe send an email to devel-leave(a)lists.nfs-ganesha.org
--
-Bharat
9:12 a.m.
New subject: [Nfs-ganesha-devel] Re: V2.5.4: lru_run won't progress, open_fd_count exhausted
Try to find the open files by doing "ls -l /proc/<PID>/fds". Are you
using NFSv4 or V3? If this is all a V3, then clearly a bug. NFSv4 may imply
some clients opened the files but never closed for some reason or we
ignored client's CLOSE request.
On Mon, Jun 18, 2018 at 7:30 PM bharat singh <bharat064015(a)gmail.com> wrote:
I already have this patch
c2b448b1a079ed66446060a695e4dd06d1c3d1c2 Fix closing global file
descriptors
On Mon, Jun 18, 2018 at 5:41 AM Daniel Gryniewicz <dang(a)redhat.com> wrote:
> Try this one:
>
> 5c2efa8f077fafa82023f5aec5e2c474c5ed2fdf Fix closing global file
> descriptors
>
> Daniel
>
>
> On 06/15/2018 03:08 PM, bharat singh wrote:
> > I have been testing Ganesha 2.5.4 code with default mdcache settings.
> It
> > starts showing issues after prolonged I/O runs.
> > Once it exhausts all the allowed fds, its kind of gets stuck
> > returning ERR_FSAL_DELAY for every client op.
> >
> > A snapshot of the mdcache
> >
> > open_fd_count = 4055
> > lru_state = {
> > entries_hiwat = 100000,
> > entries_used = 323,
> > chunks_hiwat = 100000,
> > chunks_used = 9,
> > fds_system_imposed = 4096,
> > fds_hard_limit = 4055,
> > fds_hiwat = 3686,
> > fds_lowat = 2048,
> > futility = 109,
> > per_lane_work = 50,
> > biggest_window = 1638,
> > prev_fd_count = 4055,
> > prev_time = 1529013538,
> > fd_state = 3
> > }
> >
> > [cache_lru] lru_run :INODE LRU :INFO :After work, open_fd_count:4055
> > entries used count:327 fdrate:0 threadwait=9
> > [cache_lru] lru_run :INODE LRU :INFO :lru entries: 327
> open_fd_count:4055
> > [cache_lru] lru_run :INODE LRU :INFO :lru entries: 327open_fd_count:4055
> > [cache_lru] lru_run :INODE LRU :INFO :After work, open_fd_count:4055
> > entries used count:327 fdrate:0 threadwait=90
> >
> > I have killed the NFS clients, so no new I/O is being received. But
> even
> > after a couple of hours I don't see lru_run making any progress,
> thereby
> > open_fd_count remains a 4055 and even a single file open won't be
> > served. So basically the server is in stuck state.
> >
> > I have these changes patched over 2.5.4 code
> > e2156ad3feac841487ba89969769bf765457ea6e Replace cache_fds parameter
> and
> > handling with better logic
> > 667083fe395ddbb4aa14b7bbe7e15ffca87e3b0b MDCACHE - Change and lower
> > futility message
> > 37732e61985d919e6ca84dfa7b4a84163080abae Move open_fd_count from
> MDCACHE
> > to FSALs (https://review.gerrithub.io/#/c/391267/)
> >
> > Any suggestions how to resolve this ?
> >
> >
> >
> >
> > _______________________________________________
> > Devel mailing list -- devel(a)lists.nfs-ganesha.org
> > To unsubscribe send an email to devel-leave(a)lists.nfs-ganesha.org
> >
> _______________________________________________
> Devel mailing list -- devel(a)lists.nfs-ganesha.org
> To unsubscribe send an email to devel-leave(a)lists.nfs-ganesha.org
>
--
-Bharat
_______________________________________________
Devel mailing list -- devel(a)lists.nfs-ganesha.org
To unsubscribe send an email to devel-leave(a)lists.nfs-ganesha.org
9:32 a.m.
New subject: [Nfs-ganesha-devel] Re: V2.5.4: lru_run won't progress, open_fd_count exhausted
This is a V3 mount only.
There are a bunch of socket and anonymous fds opened, but that only 554. In
current state my setup has 4055 fds opened and it won't make any progress
for days even without any new I/O coming in. I have a coredump, please let
me know what info you need out of it to debug this.
# ls -l /proc/2576/fd | wc -l
554
On Mon, Jun 18, 2018 at 7:12 AM Malahal Naineni <malahal(a)gmail.com> wrote:
Try to find the open files by doing "ls -l
/proc/<PID>/fds". Are you
using NFSv4 or V3? If this is all a V3, then clearly a bug. NFSv4 may imply
some clients opened the files but never closed for some reason or we
ignored client's CLOSE request.
On Mon, Jun 18, 2018 at 7:30 PM bharat singh <bharat064015(a)gmail.com>
wrote:
> I already have this patch
> c2b448b1a079ed66446060a695e4dd06d1c3d1c2 Fix closing global file
> descriptors
>
>
>
> On Mon, Jun 18, 2018 at 5:41 AM Daniel Gryniewicz <dang(a)redhat.com>
> wrote:
>
>> Try this one:
>>
>> 5c2efa8f077fafa82023f5aec5e2c474c5ed2fdf Fix closing global file
>> descriptors
>>
>> Daniel
>>
>>
>> On 06/15/2018 03:08 PM, bharat singh wrote:
>> > I have been testing Ganesha 2.5.4 code with default mdcache settings.
>> It
>> > starts showing issues after prolonged I/O runs.
>> > Once it exhausts all the allowed fds, its kind of gets stuck
>> > returning ERR_FSAL_DELAY for every client op.
>> >
>> > A snapshot of the mdcache
>> >
>> > open_fd_count = 4055
>> > lru_state = {
>> > entries_hiwat = 100000,
>> > entries_used = 323,
>> > chunks_hiwat = 100000,
>> > chunks_used = 9,
>> > fds_system_imposed = 4096,
>> > fds_hard_limit = 4055,
>> > fds_hiwat = 3686,
>> > fds_lowat = 2048,
>> > futility = 109,
>> > per_lane_work = 50,
>> > biggest_window = 1638,
>> > prev_fd_count = 4055,
>> > prev_time = 1529013538,
>> > fd_state = 3
>> > }
>> >
>> > [cache_lru] lru_run :INODE LRU :INFO :After work, open_fd_count:4055
>> > entries used count:327 fdrate:0 threadwait=9
>> > [cache_lru] lru_run :INODE LRU :INFO :lru entries: 327
>> open_fd_count:4055
>> > [cache_lru] lru_run :INODE LRU :INFO :lru entries:
>> 327open_fd_count:4055
>> > [cache_lru] lru_run :INODE LRU :INFO :After work, open_fd_count:4055
>> > entries used count:327 fdrate:0 threadwait=90
>> >
>> > I have killed the NFS clients, so no new I/O is being received. But
>> even
>> > after a couple of hours I don't see lru_run making any progress,
>> thereby
>> > open_fd_count remains a 4055 and even a single file open won't be
>> > served. So basically the server is in stuck state.
>> >
>> > I have these changes patched over 2.5.4 code
>> > e2156ad3feac841487ba89969769bf765457ea6e Replace cache_fds parameter
>> and
>> > handling with better logic
>> > 667083fe395ddbb4aa14b7bbe7e15ffca87e3b0b MDCACHE - Change and lower
>> > futility message
>> > 37732e61985d919e6ca84dfa7b4a84163080abae Move open_fd_count from
>> MDCACHE
>> > to FSALs (https://review.gerrithub.io/#/c/391267/)
>> >
>> > Any suggestions how to resolve this ?
>> >
>> >
>> >
>> >
>> > _______________________________________________
>> > Devel mailing list -- devel(a)lists.nfs-ganesha.org
>> > To unsubscribe send an email to devel-leave(a)lists.nfs-ganesha.org
>> >
>> _______________________________________________
>> Devel mailing list -- devel(a)lists.nfs-ganesha.org
>> To unsubscribe send an email to devel-leave(a)lists.nfs-ganesha.org
>>
>
>
> --
> -Bharat
>
>
> _______________________________________________
> Devel mailing list -- devel(a)lists.nfs-ganesha.org
> To unsubscribe send an email to devel-leave(a)lists.nfs-ganesha.org
>
--
-Bharat
10:06 a.m.
New subject: [Nfs-ganesha-devel] Re: V2.5.4: lru_run won't progress, open_fd_count exhausted
This sounds like maybe an accounting issue? I would generally expect
the number of open files to match open_fd_count (assuming you're using
FSAL_VFS, of course...) Looking through the code, it *looks* like
everything is correct, accounting wise.
Daniel
On 06/18/2018 10:32 AM, bharat singh wrote:
This is a V3 mount only.
There are a bunch of socket and anonymous fds opened, but that only 554.
In current state my setup has 4055 fds opened and it won't make any
progress for days even without any new I/O coming in. I have a coredump,
please let me know what info you need out of it to debug this.
# ls -l /proc/2576/fd | wc -l
554
On Mon, Jun 18, 2018 at 7:12 AM Malahal Naineni <malahal(a)gmail.com
<mailto:malahal@gmail.com>> wrote:
Try to find the open files by doing "ls -l /proc/<PID>/fds". Are
you using NFSv4 or V3? If this is all a V3, then clearly a bug.
NFSv4 may imply some clients opened the files but never closed for
some reason or we ignored client's CLOSE request.
On Mon, Jun 18, 2018 at 7:30 PM bharat singh <bharat064015(a)gmail.com
<mailto:bharat064015@gmail.com>> wrote:
I already have this patch
c2b448b1a079ed66446060a695e4dd06d1c3d1c2 Fix closing global file
descriptors
On Mon, Jun 18, 2018 at 5:41 AM Daniel Gryniewicz
<dang(a)redhat.com <mailto:dang@redhat.com>> wrote:
Try this one:
5c2efa8f077fafa82023f5aec5e2c474c5ed2fdf Fix closing global
file descriptors
Daniel
On 06/15/2018 03:08 PM, bharat singh wrote:
> I have been testing Ganesha 2.5.4 code with default
mdcache settings. It
> starts showing issues after prolonged I/O runs.
> Once it exhausts all the allowed fds, its kind of gets stuck
> returning ERR_FSAL_DELAY for every client op.
>
> A snapshot of the mdcache
>
> open_fd_count = 4055
> lru_state = {
> entries_hiwat = 100000,
> entries_used = 323,
> chunks_hiwat = 100000,
> chunks_used = 9,
> fds_system_imposed = 4096,
> fds_hard_limit = 4055,
> fds_hiwat = 3686,
> fds_lowat = 2048,
> futility = 109,
> per_lane_work = 50,
> biggest_window = 1638,
> prev_fd_count = 4055,
> prev_time = 1529013538,
> fd_state = 3
> }
>
> [cache_lru] lru_run :INODE LRU :INFO :After work,
open_fd_count:4055
> entries used count:327 fdrate:0 threadwait=9
> [cache_lru] lru_run :INODE LRU :INFO :lru entries: 327
open_fd_count:4055
> [cache_lru] lru_run :INODE LRU :INFO :lru entries:
327open_fd_count:4055
> [cache_lru] lru_run :INODE LRU :INFO :After work,
open_fd_count:4055
> entries used count:327 fdrate:0 threadwait=90
>
> I have killed the NFS clients, so no new I/O is being
received. But even
> after a couple of hours I don't see lru_run making any
progress, thereby
> open_fd_count remains a 4055 and even a single file open
won't be
> served. So basically the server is in stuck state.
>
> I have these changes patched over 2.5.4 code
> e2156ad3feac841487ba89969769bf765457ea6e Replace
cache_fds parameter and
> handling with better logic
> 667083fe395ddbb4aa14b7bbe7e15ffca87e3b0b MDCACHE - Change
and lower
> futility message
> 37732e61985d919e6ca84dfa7b4a84163080abae Move
open_fd_count from MDCACHE
> to FSALs (https://review.gerrithub.io/#/c/391267/)
>
> Any suggestions how to resolve this ?
>
>
>
>
> _______________________________________________
> Devel mailing list -- devel(a)lists.nfs-ganesha.org
<mailto:devel@lists.nfs-ganesha.org>
> To unsubscribe send an email to
devel-leave(a)lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>
>
_______________________________________________
Devel mailing list -- devel(a)lists.nfs-ganesha.org
<mailto:devel@lists.nfs-ganesha.org>
To unsubscribe send an email to
devel-leave(a)lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>
--
-Bharat
_______________________________________________
Devel mailing list -- devel(a)lists.nfs-ganesha.org
<mailto:devel@lists.nfs-ganesha.org>
To unsubscribe send an email to
devel-leave(a)lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>
--
-Bharat
_______________________________________________
Devel mailing list -- devel(a)lists.nfs-ganesha.org
To unsubscribe send an email to devel-leave(a)lists.nfs-ganesha.org
10:20 a.m.
New subject: [Nfs-ganesha-devel] Re: V2.5.4: lru_run won't progress, open_fd_count exhausted
The actual number of fds open is 554, at least that is what the kernel
thinks. If you have open_fd_count as 4055, something is wrong in the
accounting of open files. What is the max files your Ganesha daemon can
open (cat /proc/<PID>/limits should tell you). As far as I remember, the
accounting value "open_fd_count" is only used to close files aggressively.
Can you track code path where ganesha is sending DELAY error?
On Mon, Jun 18, 2018 at 8:03 PM bharat singh <bharat064015(a)gmail.com> wrote:
This is a V3 mount only.
There are a bunch of socket and anonymous fds opened, but that only 554.
In current state my setup has 4055 fds opened and it won't make any
progress for days even without any new I/O coming in. I have a coredump,
please let me know what info you need out of it to debug this.
# ls -l /proc/2576/fd | wc -l
554
On Mon, Jun 18, 2018 at 7:12 AM Malahal Naineni <malahal(a)gmail.com> wrote:
> Try to find the open files by doing "ls -l /proc/<PID>/fds". Are
you
> using NFSv4 or V3? If this is all a V3, then clearly a bug. NFSv4 may imply
> some clients opened the files but never closed for some reason or we
> ignored client's CLOSE request.
>
> On Mon, Jun 18, 2018 at 7:30 PM bharat singh <bharat064015(a)gmail.com>
> wrote:
>
>> I already have this patch
>> c2b448b1a079ed66446060a695e4dd06d1c3d1c2 Fix closing global file
>> descriptors
>>
>>
>>
>> On Mon, Jun 18, 2018 at 5:41 AM Daniel Gryniewicz <dang(a)redhat.com>
>> wrote:
>>
>>> Try this one:
>>>
>>> 5c2efa8f077fafa82023f5aec5e2c474c5ed2fdf Fix closing global file
>>> descriptors
>>>
>>> Daniel
>>>
>>>
>>> On 06/15/2018 03:08 PM, bharat singh wrote:
>>> > I have been testing Ganesha 2.5.4 code with default mdcache settings.
>>> It
>>> > starts showing issues after prolonged I/O runs.
>>> > Once it exhausts all the allowed fds, its kind of gets stuck
>>> > returning ERR_FSAL_DELAY for every client op.
>>> >
>>> > A snapshot of the mdcache
>>> >
>>> > open_fd_count = 4055
>>> > lru_state = {
>>> > entries_hiwat = 100000,
>>> > entries_used = 323,
>>> > chunks_hiwat = 100000,
>>> > chunks_used = 9,
>>> > fds_system_imposed = 4096,
>>> > fds_hard_limit = 4055,
>>> > fds_hiwat = 3686,
>>> > fds_lowat = 2048,
>>> > futility = 109,
>>> > per_lane_work = 50,
>>> > biggest_window = 1638,
>>> > prev_fd_count = 4055,
>>> > prev_time = 1529013538,
>>> > fd_state = 3
>>> > }
>>> >
>>> > [cache_lru] lru_run :INODE LRU :INFO :After work, open_fd_count:4055
>>> > entries used count:327 fdrate:0 threadwait=9
>>> > [cache_lru] lru_run :INODE LRU :INFO :lru entries: 327
>>> open_fd_count:4055
>>> > [cache_lru] lru_run :INODE LRU :INFO :lru entries:
>>> 327open_fd_count:4055
>>> > [cache_lru] lru_run :INODE LRU :INFO :After work, open_fd_count:4055
>>> > entries used count:327 fdrate:0 threadwait=90
>>> >
>>> > I have killed the NFS clients, so no new I/O is being received. But
>>> even
>>> > after a couple of hours I don't see lru_run making any progress,
>>> thereby
>>> > open_fd_count remains a 4055 and even a single file open won't be
>>> > served. So basically the server is in stuck state.
>>> >
>>> > I have these changes patched over 2.5.4 code
>>> > e2156ad3feac841487ba89969769bf765457ea6e Replace cache_fds parameter
>>> and
>>> > handling with better logic
>>> > 667083fe395ddbb4aa14b7bbe7e15ffca87e3b0b MDCACHE - Change and lower
>>> > futility message
>>> > 37732e61985d919e6ca84dfa7b4a84163080abae Move open_fd_count from
>>> MDCACHE
>>> > to FSALs (https://review.gerrithub.io/#/c/391267/)
>>> >
>>> > Any suggestions how to resolve this ?
>>> >
>>> >
>>> >
>>> >
>>> > _______________________________________________
>>> > Devel mailing list -- devel(a)lists.nfs-ganesha.org
>>> > To unsubscribe send an email to devel-leave(a)lists.nfs-ganesha.org
>>> >
>>> _______________________________________________
>>> Devel mailing list -- devel(a)lists.nfs-ganesha.org
>>> To unsubscribe send an email to devel-leave(a)lists.nfs-ganesha.org
>>>
>>
>>
>> --
>> -Bharat
>>
>>
>> _______________________________________________
>> Devel mailing list -- devel(a)lists.nfs-ganesha.org
>> To unsubscribe send an email to devel-leave(a)lists.nfs-ganesha.org
>>
>
--
-Bharat
10:56 a.m.
New subject: [Nfs-ganesha-devel] Re: V2.5.4: lru_run won't progress, open_fd_count exhausted
We do that. If open_fd_count > fds_hard_limit, we return EDELAY in
mdcache_open2() and fsal_reopen_obj().
Daniel
On 06/18/2018 11:20 AM, Malahal Naineni wrote:
The actual number of fds open is 554, at least that is what the
kernel
thinks. If you have open_fd_count as 4055, something is wrong in the
accounting of open files. What is the max files your Ganesha daemon can
open (cat /proc/<PID>/limits should tell you). As far as I remember,
the accounting value "open_fd_count" is only used to close files
aggressively. Can you track code path where ganesha is sending DELAY error?
On Mon, Jun 18, 2018 at 8:03 PM bharat singh <bharat064015(a)gmail.com
<mailto:bharat064015@gmail.com>> wrote:
This is a V3 mount only.
There are a bunch of socket and anonymous fds opened, but that only
554. In current state my setup has 4055 fds opened and it won't make
any progress for days even without any new I/O coming in. I have a
coredump, please let me know what info you need out of it to debug this.
# ls -l /proc/2576/fd | wc -l
554
On Mon, Jun 18, 2018 at 7:12 AM Malahal Naineni <malahal(a)gmail.com
<mailto:malahal@gmail.com>> wrote:
Try to find the open files by doing "ls -l /proc/<PID>/fds".
Are you using NFSv4 or V3? If this is all a V3, then clearly a
bug. NFSv4 may imply some clients opened the files but never
closed for some reason or we ignored client's CLOSE request.
On Mon, Jun 18, 2018 at 7:30 PM bharat singh
<bharat064015(a)gmail.com <mailto:bharat064015@gmail.com>> wrote:
I already have this patch
c2b448b1a079ed66446060a695e4dd06d1c3d1c2 Fix closing global
file descriptors
On Mon, Jun 18, 2018 at 5:41 AM Daniel Gryniewicz
<dang(a)redhat.com <mailto:dang@redhat.com>> wrote:
Try this one:
5c2efa8f077fafa82023f5aec5e2c474c5ed2fdf Fix closing
global file descriptors
Daniel
On 06/15/2018 03:08 PM, bharat singh wrote:
> I have been testing Ganesha 2.5.4 code with default
mdcache settings. It
> starts showing issues after prolonged I/O runs.
> Once it exhausts all the allowed fds, its kind of
gets stuck
> returning ERR_FSAL_DELAY for every client op.
>
> A snapshot of the mdcache
>
> open_fd_count = 4055
> lru_state = {
> entries_hiwat = 100000,
> entries_used = 323,
> chunks_hiwat = 100000,
> chunks_used = 9,
> fds_system_imposed = 4096,
> fds_hard_limit = 4055,
> fds_hiwat = 3686,
> fds_lowat = 2048,
> futility = 109,
> per_lane_work = 50,
> biggest_window = 1638,
> prev_fd_count = 4055,
> prev_time = 1529013538,
> fd_state = 3
> }
>
> [cache_lru] lru_run :INODE LRU :INFO :After work,
open_fd_count:4055
> entries used count:327 fdrate:0 threadwait=9
> [cache_lru] lru_run :INODE LRU :INFO :lru entries:
327 open_fd_count:4055
> [cache_lru] lru_run :INODE LRU :INFO :lru entries:
327open_fd_count:4055
> [cache_lru] lru_run :INODE LRU :INFO :After work,
open_fd_count:4055
> entries used count:327 fdrate:0 threadwait=90
>
> I have killed the NFS clients, so no new I/O is being
received. But even
> after a couple of hours I don't see lru_run making
any progress, thereby
> open_fd_count remains a 4055 and even a single file
open won't be
> served. So basically the server is in stuck state.
>
> I have these changes patched over 2.5.4 code
> e2156ad3feac841487ba89969769bf765457ea6e Replace
cache_fds parameter and
> handling with better logic
> 667083fe395ddbb4aa14b7bbe7e15ffca87e3b0b MDCACHE -
Change and lower
> futility message
> 37732e61985d919e6ca84dfa7b4a84163080abae Move
open_fd_count from MDCACHE
> to FSALs (https://review.gerrithub.io/#/c/391267/)
>
> Any suggestions how to resolve this ?
>
>
>
>
> _______________________________________________
> Devel mailing list -- devel(a)lists.nfs-ganesha.org
<mailto:devel@lists.nfs-ganesha.org>
> To unsubscribe send an email to
devel-leave(a)lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>
>
_______________________________________________
Devel mailing list -- devel(a)lists.nfs-ganesha.org
<mailto:devel@lists.nfs-ganesha.org>
To unsubscribe send an email to
devel-leave(a)lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>
--
-Bharat
_______________________________________________
Devel mailing list -- devel(a)lists.nfs-ganesha.org
<mailto:devel@lists.nfs-ganesha.org>
To unsubscribe send an email to
devel-leave(a)lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>
--
-Bharat
_______________________________________________
Devel mailing list -- devel(a)lists.nfs-ganesha.org
To unsubscribe send an email to devel-leave(a)lists.nfs-ganesha.org
w
11:13 a.m.
New subject: [Nfs-ganesha-devel] Re: V2.5.4: lru_run won't progress, open_fd_count exhausted
# cat /proc/14459/limits
Limit Soft Limit Hard Limit Units
Max open files 4096 4096 files
I suspect a leak in lru_run_lane, but I might be wrong here
static inline size_t lru_run_lane(size_t lane, uint64_t *const totalclosed)
{
...
/* check refcnt in range */
if (unlikely(refcnt > 2)) {
/* This unref is ok to be done without a valid op_ctx
* because we always map a new entry to an export before
* we could possibly release references in
* mdcache_new_entry.
*/
QUNLOCK(qlane);
mdcache_lru_unref(entry); >>>>>> won don'e have a
fsal_close
for this mdcache_lru_unref
goto next_lru;
}
...
/* Make sure any FSAL global file descriptor is closed. */
status = fsal_close(&entry->obj_handle);
if (not_support_ex) {
/* Release the content lock. */
PTHREAD_RWLOCK_unlock(&entry->content_lock);
}
if (FSAL_IS_ERROR(status)) {
LogCrit(COMPONENT_CACHE_INODE_LRU,
"Error closing file in LRU thread.");
} else {
++(*totalclosed);
++closed;
}
mdcache_lru_unref(entry);
}
On Mon, Jun 18, 2018 at 8:56 AM Daniel Gryniewicz <dang(a)redhat.com> wrote:
We do that. If open_fd_count > fds_hard_limit, we return EDELAY
in
mdcache_open2() and fsal_reopen_obj().
Daniel
On 06/18/2018 11:20 AM, Malahal Naineni wrote:
> The actual number of fds open is 554, at least that is what the kernel
> thinks. If you have open_fd_count as 4055, something is wrong in the
> accounting of open files. What is the max files your Ganesha daemon can
> open (cat /proc/<PID>/limits should tell you). As far as I remember,
> the accounting value "open_fd_count" is only used to close files
> aggressively. Can you track code path where ganesha is sending DELAY
error?
>
> On Mon, Jun 18, 2018 at 8:03 PM bharat singh <bharat064015(a)gmail.com
> <mailto:bharat064015@gmail.com>> wrote:
>
> This is a V3 mount only.
> There are a bunch of socket and anonymous fds opened, but that only
> 554. In current state my setup has 4055 fds opened and it won't make
> any progress for days even without any new I/O coming in. I have a
> coredump, please let me know what info you need out of it to debug
this.
>
> # ls -l /proc/2576/fd | wc -l
> 554
>
> On Mon, Jun 18, 2018 at 7:12 AM Malahal Naineni <malahal(a)gmail.com
> <mailto:malahal@gmail.com>> wrote:
>
> Try to find the open files by doing "ls -l
/proc/<PID>/fds".
> Are you using NFSv4 or V3? If this is all a V3, then clearly a
> bug. NFSv4 may imply some clients opened the files but never
> closed for some reason or we ignored client's CLOSE request.
>
> On Mon, Jun 18, 2018 at 7:30 PM bharat singh
> <bharat064015(a)gmail.com <mailto:bharat064015@gmail.com>> wrote:
>
> I already have this patch
> c2b448b1a079ed66446060a695e4dd06d1c3d1c2 Fix closing global
> file descriptors
>
>
>
> On Mon, Jun 18, 2018 at 5:41 AM Daniel Gryniewicz
> <dang(a)redhat.com <mailto:dang@redhat.com>> wrote:
>
> Try this one:
>
> 5c2efa8f077fafa82023f5aec5e2c474c5ed2fdf Fix closing
> global file descriptors
>
> Daniel
>
>
> On 06/15/2018 03:08 PM, bharat singh wrote:
> > I have been testing Ganesha 2.5.4 code with default
> mdcache settings. It
> > starts showing issues after prolonged I/O runs.
> > Once it exhausts all the allowed fds, its kind of
> gets stuck
> > returning ERR_FSAL_DELAY for every client op.
> >
> > A snapshot of the mdcache
> >
> > open_fd_count = 4055
> > lru_state = {
> > entries_hiwat = 100000,
> > entries_used = 323,
> > chunks_hiwat = 100000,
> > chunks_used = 9,
> > fds_system_imposed = 4096,
> > fds_hard_limit = 4055,
> > fds_hiwat = 3686,
> > fds_lowat = 2048,
> > futility = 109,
> > per_lane_work = 50,
> > biggest_window = 1638,
> > prev_fd_count = 4055,
> > prev_time = 1529013538,
> > fd_state = 3
> > }
> >
> > [cache_lru] lru_run :INODE LRU :INFO :After work,
> open_fd_count:4055
> > entries used count:327 fdrate:0 threadwait=9
> > [cache_lru] lru_run :INODE LRU :INFO :lru entries:
> 327 open_fd_count:4055
> > [cache_lru] lru_run :INODE LRU :INFO :lru entries:
> 327open_fd_count:4055
> > [cache_lru] lru_run :INODE LRU :INFO :After work,
> open_fd_count:4055
> > entries used count:327 fdrate:0 threadwait=90
> >
> > I have killed the NFS clients, so no new I/O is being
> received. But even
> > after a couple of hours I don't see lru_run making
> any progress, thereby
> > open_fd_count remains a 4055 and even a single file
> open won't be
> > served. So basically the server is in stuck state.
> >
> > I have these changes patched over 2.5.4 code
> > e2156ad3feac841487ba89969769bf765457ea6e Replace
> cache_fds parameter and
> > handling with better logic
> > 667083fe395ddbb4aa14b7bbe7e15ffca87e3b0b MDCACHE -
> Change and lower
> > futility message
> > 37732e61985d919e6ca84dfa7b4a84163080abae Move
> open_fd_count from MDCACHE
> > to FSALs (https://review.gerrithub.io/#/c/391267/)
> >
> > Any suggestions how to resolve this ?
> >
> >
> >
> >
> > _______________________________________________
> > Devel mailing list -- devel(a)lists.nfs-ganesha.org
> <mailto:devel@lists.nfs-ganesha.org>
> > To unsubscribe send an email to
> devel-leave(a)lists.nfs-ganesha.org
> <mailto:devel-leave@lists.nfs-ganesha.org>
> >
> _______________________________________________
> Devel mailing list -- devel(a)lists.nfs-ganesha.org
> <mailto:devel@lists.nfs-ganesha.org>
> To unsubscribe send an email to
> devel-leave(a)lists.nfs-ganesha.org
> <mailto:devel-leave@lists.nfs-ganesha.org>
>
>
>
> --
> -Bharat
>
>
> _______________________________________________
> Devel mailing list -- devel(a)lists.nfs-ganesha.org
> <mailto:devel@lists.nfs-ganesha.org>
> To unsubscribe send an email to
> devel-leave(a)lists.nfs-ganesha.org
> <mailto:devel-leave@lists.nfs-ganesha.org>
>
>
>
> --
> -Bharat
>
>
>
>
> _______________________________________________
> Devel mailing list -- devel(a)lists.nfs-ganesha.org
> To unsubscribe send an email to devel-leave(a)lists.nfs-ganesha.org
>
w
_______________________________________________
Devel mailing list -- devel(a)lists.nfs-ganesha.org
To unsubscribe send an email to devel-leave(a)lists.nfs-ganesha.org
--
-Bharat
12:02 p.m.
New subject: [Nfs-ganesha-devel] Re: V2.5.4: lru_run won't progress, open_fd_count exhausted
No, that one's okay. That check means the entry is in use (something
has an active recfount on it), so it's just skipped, and the next entry
is considered.
Eventually, when that entry is no longer in use, it will be closed.
Daniel
On 06/18/2018 12:13 PM, bharat singh wrote:
# cat /proc/14459/limits
Limit Soft Limit Hard Limit Units
Max open files 4096 4096 files
I suspect a leak in lru_run_lane, but I might be wrong here
static inline size_t lru_run_lane(size_t lane, uint64_t *const totalclosed)
{
...
/* check refcnt in range */
if (unlikely(refcnt > 2)) {
/* This unref is ok to be done without a valid op_ctx
* because we always map a new entry to an export before
* we could possibly release references in
* mdcache_new_entry.
*/
QUNLOCK(qlane);
mdcache_lru_unref(entry); >>>>>> won don'e have a
fsal_close for this mdcache_lru_unref
goto next_lru;
}
...
/* Make sure any FSAL global file descriptor is closed. */
status = fsal_close(&entry->obj_handle);
if (not_support_ex) {
/* Release the content lock. */
PTHREAD_RWLOCK_unlock(&entry->content_lock);
}
if (FSAL_IS_ERROR(status)) {
LogCrit(COMPONENT_CACHE_INODE_LRU,
"Error closing file in LRU thread.");
} else {
++(*totalclosed);
++closed;
}
mdcache_lru_unref(entry);
}
On Mon, Jun 18, 2018 at 8:56 AM Daniel Gryniewicz <dang(a)redhat.com
<mailto:dang@redhat.com>> wrote:
We do that. If open_fd_count > fds_hard_limit, we return EDELAY in
mdcache_open2() and fsal_reopen_obj().
Daniel
On 06/18/2018 11:20 AM, Malahal Naineni wrote:
> The actual number of fds open is 554, at least that is what the
kernel
> thinks. If you have open_fd_count as 4055, something is wrong in the
> accounting of open files. What is the max files your Ganesha
daemon can
> open (cat /proc/<PID>/limits should tell you). As far as I
remember,
> the accounting value "open_fd_count" is only used to close files
> aggressively. Can you track code path where ganesha is sending
DELAY error?
>
> On Mon, Jun 18, 2018 at 8:03 PM bharat singh
<bharat064015(a)gmail.com <mailto:bharat064015@gmail.com>
> <mailto:bharat064015@gmail.com
<mailto:bharat064015@gmail.com>>>
wrote:
>
> This is a V3 mount only.
> There are a bunch of socket and anonymous fds opened, but
that only
> 554. In current state my setup has 4055 fds opened and it
won't make
> any progress for days even without any new I/O coming in. I
have a
> coredump, please let me know what info you need out of it to
debug this.
>
> # ls -l /proc/2576/fd | wc -l
> 554
>
> On Mon, Jun 18, 2018 at 7:12 AM Malahal Naineni
<malahal(a)gmail.com <mailto:malahal@gmail.com>
> <mailto:malahal@gmail.com <mailto:malahal@gmail.com>>>
wrote:
>
> Try to find the open files by doing "ls -l
/proc/<PID>/fds".
> Are you using NFSv4 or V3? If this is all a V3, then
clearly a
> bug. NFSv4 may imply some clients opened the files but never
> closed for some reason or we ignored client's CLOSE request.
>
> On Mon, Jun 18, 2018 at 7:30 PM bharat singh
> <bharat064015(a)gmail.com <mailto:bharat064015@gmail.com>
<mailto:bharat064015@gmail.com <mailto:bharat064015@gmail.com>>>
wrote:
>
> I already have this patch
> c2b448b1a079ed66446060a695e4dd06d1c3d1c2 Fix closing
global
> file descriptors
>
>
>
> On Mon, Jun 18, 2018 at 5:41 AM Daniel Gryniewicz
> <dang(a)redhat.com <mailto:dang@redhat.com>
<mailto:dang@redhat.com <mailto:dang@redhat.com>>> wrote:
>
> Try this one:
>
> 5c2efa8f077fafa82023f5aec5e2c474c5ed2fdf Fix closing
> global file descriptors
>
> Daniel
>
>
> On 06/15/2018 03:08 PM, bharat singh wrote:
> > I have been testing Ganesha 2.5.4 code with
default
> mdcache settings. It
> > starts showing issues after prolonged I/O runs.
> > Once it exhausts all the allowed fds, its kind of
> gets stuck
> > returning ERR_FSAL_DELAY for every client op.
> >
> > A snapshot of the mdcache
> >
> > open_fd_count = 4055
> > lru_state = {
> > entries_hiwat = 100000,
> > entries_used = 323,
> > chunks_hiwat = 100000,
> > chunks_used = 9,
> > fds_system_imposed = 4096,
> > fds_hard_limit = 4055,
> > fds_hiwat = 3686,
> > fds_lowat = 2048,
> > futility = 109,
> > per_lane_work = 50,
> > biggest_window = 1638,
> > prev_fd_count = 4055,
> > prev_time = 1529013538,
> > fd_state = 3
> > }
> >
> > [cache_lru] lru_run :INODE LRU :INFO :After work,
> open_fd_count:4055
> > entries used count:327 fdrate:0 threadwait=9
> > [cache_lru] lru_run :INODE LRU :INFO :lru entries:
> 327 open_fd_count:4055
> > [cache_lru] lru_run :INODE LRU :INFO :lru entries:
> 327open_fd_count:4055
> > [cache_lru] lru_run :INODE LRU :INFO :After work,
> open_fd_count:4055
> > entries used count:327 fdrate:0 threadwait=90
> >
> > I have killed the NFS clients, so no new I/O
is being
> received. But even
> > after a couple of hours I don't see lru_run making
> any progress, thereby
> > open_fd_count remains a 4055 and even a single
file
> open won't be
> > served. So basically the server is in stuck state.
> >
> > I have these changes patched over 2.5.4 code
> > e2156ad3feac841487ba89969769bf765457ea6e Replace
> cache_fds parameter and
> > handling with better logic
> > 667083fe395ddbb4aa14b7bbe7e15ffca87e3b0b MDCACHE -
> Change and lower
> > futility message
> > 37732e61985d919e6ca84dfa7b4a84163080abae Move
> open_fd_count from MDCACHE
> > to FSALs (https://review.gerrithub.io/#/c/391267/)
> >
> > Any suggestions how to resolve this ?
> >
> >
> >
> >
> > _______________________________________________
> > Devel mailing list --
devel(a)lists.nfs-ganesha.org <mailto:devel@lists.nfs-ganesha.org>
> <mailto:devel@lists.nfs-ganesha.org
<mailto:devel@lists.nfs-ganesha.org>>
> > To unsubscribe send an email to
> devel-leave(a)lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>
> <mailto:devel-leave@lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>>
> >
> _______________________________________________
> Devel mailing list -- devel(a)lists.nfs-ganesha.org
<mailto:devel@lists.nfs-ganesha.org>
> <mailto:devel@lists.nfs-ganesha.org
<mailto:devel@lists.nfs-ganesha.org>>
> To unsubscribe send an email to
> devel-leave(a)lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>
> <mailto:devel-leave@lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>>
>
>
>
> --
> -Bharat
>
>
> _______________________________________________
> Devel mailing list -- devel(a)lists.nfs-ganesha.org
<mailto:devel@lists.nfs-ganesha.org>
> <mailto:devel@lists.nfs-ganesha.org
<mailto:devel@lists.nfs-ganesha.org>>
> To unsubscribe send an email to
> devel-leave(a)lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>
> <mailto:devel-leave@lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>>
>
>
>
> --
> -Bharat
>
>
>
>
> _______________________________________________
> Devel mailing list -- devel(a)lists.nfs-ganesha.org
<mailto:devel@lists.nfs-ganesha.org>
> To unsubscribe send an email to devel-leave(a)lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>
>
w
_______________________________________________
Devel mailing list -- devel(a)lists.nfs-ganesha.org
<mailto:devel@lists.nfs-ganesha.org>
To unsubscribe send an email to devel-leave(a)lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>
--
-Bharat
7:16 p.m.
New subject: [Nfs-ganesha-devel] Re: V2.5.4: lru_run won't progress, open_fd_count exhausted
I do see these message frequently, but still their occurrences won't add up
to 4055.
[work-77] fsal_rdwr :FSAL :EVENT :fsal_rdwr_plus: close = File/directory
not opened
[work-167] fsal_rdwr :FSAL :EVENT :fsal_rdwr_plus: close = File/directory
not opened
On Mon, Jun 18, 2018 at 10:02 AM Daniel Gryniewicz <dang(a)redhat.com> wrote:
No, that one's okay. That check means the entry is in use
(something
has an active recfount on it), so it's just skipped, and the next entry
is considered.
Eventually, when that entry is no longer in use, it will be closed.
Daniel
On 06/18/2018 12:13 PM, bharat singh wrote:
> # cat /proc/14459/limits
> Limit Soft Limit Hard Limit Units
> Max open files 4096 4096 files
>
> I suspect a leak in lru_run_lane, but I might be wrong here
>
> static inline size_t lru_run_lane(size_t lane, uint64_t *const
totalclosed)
> {
> ...
> /* check refcnt in range */
> if (unlikely(refcnt > 2)) {
> /* This unref is ok to be done without a valid op_ctx
> * because we always map a new entry to an export before
> * we could possibly release references in
> * mdcache_new_entry.
> */
> QUNLOCK(qlane);
> mdcache_lru_unref(entry); >>>>>> won don'e have
a
> fsal_close for this mdcache_lru_unref
> goto next_lru;
> }
> ...
> /* Make sure any FSAL global file descriptor is closed. */
> status = fsal_close(&entry->obj_handle);
>
> if (not_support_ex) {
> /* Release the content lock. */
> PTHREAD_RWLOCK_unlock(&entry->content_lock);
> }
>
> if (FSAL_IS_ERROR(status)) {
> LogCrit(COMPONENT_CACHE_INODE_LRU,
> "Error closing file in LRU thread.");
> } else {
> ++(*totalclosed);
> ++closed;
> }
>
> mdcache_lru_unref(entry);
> }
>
> On Mon, Jun 18, 2018 at 8:56 AM Daniel Gryniewicz <dang(a)redhat.com
> <mailto:dang@redhat.com>> wrote:
>
> We do that. If open_fd_count > fds_hard_limit, we return EDELAY in
> mdcache_open2() and fsal_reopen_obj().
>
> Daniel
>
> On 06/18/2018 11:20 AM, Malahal Naineni wrote:
> > The actual number of fds open is 554, at least that is what the
> kernel
> > thinks. If you have open_fd_count as 4055, something is wrong in
the
> > accounting of open files. What is the max files your Ganesha
> daemon can
> > open (cat /proc/<PID>/limits should tell you). As far as I
> remember,
> > the accounting value "open_fd_count" is only used to close
files
> > aggressively. Can you track code path where ganesha is sending
> DELAY error?
> >
> > On Mon, Jun 18, 2018 at 8:03 PM bharat singh
> <bharat064015(a)gmail.com <mailto:bharat064015@gmail.com>
> > <mailto:bharat064015@gmail.com
<mailto:bharat064015@gmail.com>>>
> wrote:
> >
> > This is a V3 mount only.
> > There are a bunch of socket and anonymous fds opened, but
> that only
> > 554. In current state my setup has 4055 fds opened and it
> won't make
> > any progress for days even without any new I/O coming in. I
> have a
> > coredump, please let me know what info you need out of it to
> debug this.
> >
> > # ls -l /proc/2576/fd | wc -l
> > 554
> >
> > On Mon, Jun 18, 2018 at 7:12 AM Malahal Naineni
> <malahal(a)gmail.com <mailto:malahal@gmail.com>
> > <mailto:malahal@gmail.com <mailto:malahal@gmail.com>>>
wrote:
> >
> > Try to find the open files by doing "ls -l
> /proc/<PID>/fds".
> > Are you using NFSv4 or V3? If this is all a V3, then
> clearly a
> > bug. NFSv4 may imply some clients opened the files but
never
> > closed for some reason or we ignored client's CLOSE
request.
> >
> > On Mon, Jun 18, 2018 at 7:30 PM bharat singh
> > <bharat064015(a)gmail.com <mailto:bharat064015@gmail.com>
> <mailto:bharat064015@gmail.com <mailto:bharat064015@gmail.com>>>
wrote:
> >
> > I already have this patch
> > c2b448b1a079ed66446060a695e4dd06d1c3d1c2 Fix closing
> global
> > file descriptors
> >
> >
> >
> > On Mon, Jun 18, 2018 at 5:41 AM Daniel Gryniewicz
> > <dang(a)redhat.com <mailto:dang@redhat.com>
> <mailto:dang@redhat.com <mailto:dang@redhat.com>>> wrote:
> >
> > Try this one:
> >
> > 5c2efa8f077fafa82023f5aec5e2c474c5ed2fdf Fix
closing
> > global file descriptors
> >
> > Daniel
> >
> >
> > On 06/15/2018 03:08 PM, bharat singh wrote:
> > > I have been testing Ganesha 2.5.4 code with
> default
> > mdcache settings. It
> > > starts showing issues after prolonged I/O runs.
> > > Once it exhausts all the allowed fds, its kind
of
> > gets stuck
> > > returning ERR_FSAL_DELAY for every client op.
> > >
> > > A snapshot of the mdcache
> > >
> > > open_fd_count = 4055
> > > lru_state = {
> > > entries_hiwat = 100000,
> > > entries_used = 323,
> > > chunks_hiwat = 100000,
> > > chunks_used = 9,
> > > fds_system_imposed = 4096,
> > > fds_hard_limit = 4055,
> > > fds_hiwat = 3686,
> > > fds_lowat = 2048,
> > > futility = 109,
> > > per_lane_work = 50,
> > > biggest_window = 1638,
> > > prev_fd_count = 4055,
> > > prev_time = 1529013538,
> > > fd_state = 3
> > > }
> > >
> > > [cache_lru] lru_run :INODE LRU :INFO :After
work,
> > open_fd_count:4055
> > > entries used count:327 fdrate:0 threadwait=9
> > > [cache_lru] lru_run :INODE LRU :INFO :lru
entries:
> > 327 open_fd_count:4055
> > > [cache_lru] lru_run :INODE LRU :INFO :lru
entries:
> > 327open_fd_count:4055
> > > [cache_lru] lru_run :INODE LRU :INFO :After
work,
> > open_fd_count:4055
> > > entries used count:327 fdrate:0 threadwait=90
> > >
> > > I have killed the NFS clients, so no new I/O
> is being
> > received. But even
> > > after a couple of hours I don't see lru_run
making
> > any progress, thereby
> > > open_fd_count remains a 4055 and even a single
> file
> > open won't be
> > > served. So basically the server is in stuck
state.
> > >
> > > I have these changes patched over 2.5.4 code
> > > e2156ad3feac841487ba89969769bf765457ea6e
Replace
> > cache_fds parameter and
> > > handling with better logic
> > > 667083fe395ddbb4aa14b7bbe7e15ffca87e3b0b
MDCACHE -
> > Change and lower
> > > futility message
> > > 37732e61985d919e6ca84dfa7b4a84163080abae Move
> > open_fd_count from MDCACHE
> > > to FSALs (
https://review.gerrithub.io/#/c/391267/)
> > >
> > > Any suggestions how to resolve this ?
> > >
> > >
> > >
> > >
> > > _______________________________________________
> > > Devel mailing list --
> devel(a)lists.nfs-ganesha.org <mailto:devel@lists.nfs-ganesha.org>
> > <mailto:devel@lists.nfs-ganesha.org
> <mailto:devel@lists.nfs-ganesha.org>>
> > > To unsubscribe send an email to
> > devel-leave(a)lists.nfs-ganesha.org
> <mailto:devel-leave@lists.nfs-ganesha.org>
> > <mailto:devel-leave@lists.nfs-ganesha.org
> <mailto:devel-leave@lists.nfs-ganesha.org>>
> > >
> > _______________________________________________
> > Devel mailing list -- devel(a)lists.nfs-ganesha.org
> <mailto:devel@lists.nfs-ganesha.org>
> > <mailto:devel@lists.nfs-ganesha.org
> <mailto:devel@lists.nfs-ganesha.org>>
> > To unsubscribe send an email to
> > devel-leave(a)lists.nfs-ganesha.org
> <mailto:devel-leave@lists.nfs-ganesha.org>
> > <mailto:devel-leave@lists.nfs-ganesha.org
> <mailto:devel-leave@lists.nfs-ganesha.org>>
> >
> >
> >
> > --
> > -Bharat
> >
> >
> > _______________________________________________
> > Devel mailing list -- devel(a)lists.nfs-ganesha.org
> <mailto:devel@lists.nfs-ganesha.org>
> > <mailto:devel@lists.nfs-ganesha.org
> <mailto:devel@lists.nfs-ganesha.org>>
> > To unsubscribe send an email to
> > devel-leave(a)lists.nfs-ganesha.org
> <mailto:devel-leave@lists.nfs-ganesha.org>
> > <mailto:devel-leave@lists.nfs-ganesha.org
> <mailto:devel-leave@lists.nfs-ganesha.org>>
> >
> >
> >
> > --
> > -Bharat
> >
> >
> >
> >
> > _______________________________________________
> > Devel mailing list -- devel(a)lists.nfs-ganesha.org
> <mailto:devel@lists.nfs-ganesha.org>
> > To unsubscribe send an email to devel-leave(a)lists.nfs-ganesha.org
> <mailto:devel-leave@lists.nfs-ganesha.org>
> >
> w
> _______________________________________________
> Devel mailing list -- devel(a)lists.nfs-ganesha.org
> <mailto:devel@lists.nfs-ganesha.org>
> To unsubscribe send an email to devel-leave(a)lists.nfs-ganesha.org
> <mailto:devel-leave@lists.nfs-ganesha.org>
>
>
>
> --
> -Bharat
>
>
--
-Bharat
7:26 a.m.
New subject: [Nfs-ganesha-devel] Re: V2.5.4: lru_run won't progress, open_fd_count exhausted
Oh, so this is a non-support_ex() FSAL? That may be an issue, I'm not
sure that the non-support_ex() codepaths are correct, since there are no
in-tree FSALs that use them, and they've been completely removed from
later versions of Ganesha.
One thing you can do is to add LTTng tracepoint at every inc and dec of
open_fd_count, and then run with just that tracepoint on. It should be
low enough overhead to avoid interfering with normal operation.
Daniel
On 06/18/2018 08:16 PM, bharat singh wrote:
I do see these message frequently, but still their occurrences
won't add
up to 4055.
[work-77] fsal_rdwr :FSAL :EVENT :fsal_rdwr_plus: close = File/directory
not opened
[work-167] fsal_rdwr :FSAL :EVENT :fsal_rdwr_plus: close =
File/directory not opened
On Mon, Jun 18, 2018 at 10:02 AM Daniel Gryniewicz <dang(a)redhat.com
<mailto:dang@redhat.com>> wrote:
No, that one's okay. That check means the entry is in use (something
has an active recfount on it), so it's just skipped, and the next entry
is considered.
Eventually, when that entry is no longer in use, it will be closed.
Daniel
On 06/18/2018 12:13 PM, bharat singh wrote:
> # cat /proc/14459/limits
> Limit Soft Limit Hard Limit
Units
> Max open files 4096 4096
files
>
> I suspect a leak in lru_run_lane, but I might be wrong here
>
> static inline size_t lru_run_lane(size_t lane, uint64_t *const
totalclosed)
> {
> ...
> /* check refcnt in range */
> if (unlikely(refcnt > 2)) {
> /* This unref is ok to be done without a valid op_ctx
> * because we always map a new entry to an export before
> * we could possibly release references in
> * mdcache_new_entry.
> */
> QUNLOCK(qlane);
> mdcache_lru_unref(entry); >>>>>> won don'e
have a
> fsal_close for this mdcache_lru_unref
> goto next_lru;
> }
> ...
> /* Make sure any FSAL global file descriptor is closed. */
> status = fsal_close(&entry->obj_handle);
>
> if (not_support_ex) {
> /* Release the content lock. */
> PTHREAD_RWLOCK_unlock(&entry->content_lock);
> }
>
> if (FSAL_IS_ERROR(status)) {
> LogCrit(COMPONENT_CACHE_INODE_LRU,
> "Error closing file in LRU thread.");
> } else {
> ++(*totalclosed);
> ++closed;
> }
>
> mdcache_lru_unref(entry);
> }
>
> On Mon, Jun 18, 2018 at 8:56 AM Daniel Gryniewicz
<dang(a)redhat.com <mailto:dang@redhat.com>
> <mailto:dang@redhat.com <mailto:dang@redhat.com>>> wrote:
>
> We do that. If open_fd_count > fds_hard_limit, we return
EDELAY in
> mdcache_open2() and fsal_reopen_obj().
>
> Daniel
>
> On 06/18/2018 11:20 AM, Malahal Naineni wrote:
> > The actual number of fds open is 554, at least that is
what the
> kernel
> > thinks. If you have open_fd_count as 4055, something is
wrong in the
> > accounting of open files. What is the max files your Ganesha
> daemon can
> > open (cat /proc/<PID>/limits should tell you). As far as I
> remember,
> > the accounting value "open_fd_count" is only used to close
files
> > aggressively. Can you track code path where ganesha is sending
> DELAY error?
> >
> > On Mon, Jun 18, 2018 at 8:03 PM bharat singh
> <bharat064015(a)gmail.com <mailto:bharat064015@gmail.com>
<mailto:bharat064015@gmail.com <mailto:bharat064015@gmail.com>>
> > <mailto:bharat064015@gmail.com
<mailto:bharat064015@gmail.com> <mailto:bharat064015@gmail.com
<mailto:bharat064015@gmail.com>>>>
> wrote:
> >
> > This is a V3 mount only.
> > There are a bunch of socket and anonymous fds opened, but
> that only
> > 554. In current state my setup has 4055 fds opened and it
> won't make
> > any progress for days even without any new I/O coming
in. I
> have a
> > coredump, please let me know what info you need out of
it to
> debug this.
> >
> > # ls -l /proc/2576/fd | wc -l
> > 554
> >
> > On Mon, Jun 18, 2018 at 7:12 AM Malahal Naineni
> <malahal(a)gmail.com <mailto:malahal@gmail.com>
<mailto:malahal@gmail.com <mailto:malahal@gmail.com>>
> > <mailto:malahal@gmail.com <mailto:malahal@gmail.com>
<mailto:malahal@gmail.com <mailto:malahal@gmail.com>>>> wrote:
> >
> > Try to find the open files by doing "ls -l
> /proc/<PID>/fds".
> > Are you using NFSv4 or V3? If this is all a V3, then
> clearly a
> > bug. NFSv4 may imply some clients opened the files
but never
> > closed for some reason or we ignored client's
CLOSE request.
> >
> > On Mon, Jun 18, 2018 at 7:30 PM bharat singh
> > <bharat064015(a)gmail.com
<mailto:bharat064015@gmail.com> <mailto:bharat064015@gmail.com
<mailto:bharat064015@gmail.com>>
> <mailto:bharat064015@gmail.com
<mailto:bharat064015@gmail.com> <mailto:bharat064015@gmail.com
<mailto:bharat064015@gmail.com>>>> wrote:
> >
> > I already have this patch
> > c2b448b1a079ed66446060a695e4dd06d1c3d1c2 Fix
closing
> global
> > file descriptors
> >
> >
> >
> > On Mon, Jun 18, 2018 at 5:41 AM Daniel Gryniewicz
> > <dang(a)redhat.com <mailto:dang@redhat.com>
<mailto:dang@redhat.com <mailto:dang@redhat.com>>
> <mailto:dang@redhat.com <mailto:dang@redhat.com>
<mailto:dang@redhat.com <mailto:dang@redhat.com>>>> wrote:
> >
> > Try this one:
> >
> > 5c2efa8f077fafa82023f5aec5e2c474c5ed2fdf
Fix closing
> > global file descriptors
> >
> > Daniel
> >
> >
> > On 06/15/2018 03:08 PM, bharat singh wrote:
> > > I have been testing Ganesha 2.5.4 code with
> default
> > mdcache settings. It
> > > starts showing issues after prolonged
I/O runs.
> > > Once it exhausts all the allowed fds,
its kind of
> > gets stuck
> > > returning ERR_FSAL_DELAY for every
client op.
> > >
> > > A snapshot of the mdcache
> > >
> > > open_fd_count = 4055
> > > lru_state = {
> > > entries_hiwat = 100000,
> > > entries_used = 323,
> > > chunks_hiwat = 100000,
> > > chunks_used = 9,
> > > fds_system_imposed = 4096,
> > > fds_hard_limit = 4055,
> > > fds_hiwat = 3686,
> > > fds_lowat = 2048,
> > > futility = 109,
> > > per_lane_work = 50,
> > > biggest_window = 1638,
> > > prev_fd_count = 4055,
> > > prev_time = 1529013538,
> > > fd_state = 3
> > > }
> > >
> > > [cache_lru] lru_run :INODE LRU :INFO
:After work,
> > open_fd_count:4055
> > > entries used count:327 fdrate:0
threadwait=9
> > > [cache_lru] lru_run :INODE LRU :INFO
:lru entries:
> > 327 open_fd_count:4055
> > > [cache_lru] lru_run :INODE LRU :INFO
:lru entries:
> > 327open_fd_count:4055
> > > [cache_lru] lru_run :INODE LRU :INFO
:After work,
> > open_fd_count:4055
> > > entries used count:327 fdrate:0
threadwait=90
> > >
> > > I have killed the NFS clients, so no
new I/O
> is being
> > received. But even
> > > after a couple of hours I don't see
lru_run making
> > any progress, thereby
> > > open_fd_count remains a 4055 and even a
single
> file
> > open won't be
> > > served. So basically the server is in
stuck state.
> > >
> > > I have these changes patched over 2.5.4
code
> > >
e2156ad3feac841487ba89969769bf765457ea6e Replace
> > cache_fds parameter and
> > > handling with better logic
> > >
667083fe395ddbb4aa14b7bbe7e15ffca87e3b0b MDCACHE -
> > Change and lower
> > > futility message
> > >
37732e61985d919e6ca84dfa7b4a84163080abae Move
> > open_fd_count from MDCACHE
> > > to FSALs
(https://review.gerrithub.io/#/c/391267/)
> > >
> > > Any suggestions how to resolve this ?
> > >
> > >
> > >
> > >
> > >
_______________________________________________
> > > Devel mailing list --
> devel(a)lists.nfs-ganesha.org <mailto:devel@lists.nfs-ganesha.org>
<mailto:devel@lists.nfs-ganesha.org
<mailto:devel@lists.nfs-ganesha.org>>
> > <mailto:devel@lists.nfs-ganesha.org
<mailto:devel@lists.nfs-ganesha.org>
> <mailto:devel@lists.nfs-ganesha.org
<mailto:devel@lists.nfs-ganesha.org>>>
> > > To unsubscribe send an email to
> > devel-leave(a)lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>
> <mailto:devel-leave@lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>>
> > <mailto:devel-leave@lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>
> <mailto:devel-leave@lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>>>
> > >
> >
_______________________________________________
> > Devel mailing list --
devel(a)lists.nfs-ganesha.org <mailto:devel@lists.nfs-ganesha.org>
> <mailto:devel@lists.nfs-ganesha.org
<mailto:devel@lists.nfs-ganesha.org>>
> > <mailto:devel@lists.nfs-ganesha.org
<mailto:devel@lists.nfs-ganesha.org>
> <mailto:devel@lists.nfs-ganesha.org
<mailto:devel@lists.nfs-ganesha.org>>>
> > To unsubscribe send an email to
> > devel-leave(a)lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>
> <mailto:devel-leave@lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>>
> > <mailto:devel-leave@lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>
> <mailto:devel-leave@lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>>>
> >
> >
> >
> > --
> > -Bharat
> >
> >
> > _______________________________________________
> > Devel mailing list --
devel(a)lists.nfs-ganesha.org <mailto:devel@lists.nfs-ganesha.org>
> <mailto:devel@lists.nfs-ganesha.org
<mailto:devel@lists.nfs-ganesha.org>>
> > <mailto:devel@lists.nfs-ganesha.org
<mailto:devel@lists.nfs-ganesha.org>
> <mailto:devel@lists.nfs-ganesha.org
<mailto:devel@lists.nfs-ganesha.org>>>
> > To unsubscribe send an email to
> > devel-leave(a)lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>
> <mailto:devel-leave@lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>>
> > <mailto:devel-leave@lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>
> <mailto:devel-leave@lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>>>
> >
> >
> >
> > --
> > -Bharat
> >
> >
> >
> >
> > _______________________________________________
> > Devel mailing list -- devel(a)lists.nfs-ganesha.org
<mailto:devel@lists.nfs-ganesha.org>
> <mailto:devel@lists.nfs-ganesha.org
<mailto:devel@lists.nfs-ganesha.org>>
> > To unsubscribe send an email to
devel-leave(a)lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>
> <mailto:devel-leave@lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>>
> >
> w
> _______________________________________________
> Devel mailing list -- devel(a)lists.nfs-ganesha.org
<mailto:devel@lists.nfs-ganesha.org>
> <mailto:devel@lists.nfs-ganesha.org
<mailto:devel@lists.nfs-ganesha.org>>
> To unsubscribe send an email to
devel-leave(a)lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>
> <mailto:devel-leave@lists.nfs-ganesha.org
<mailto:devel-leave@lists.nfs-ganesha.org>>
>
>
>
> --
> -Bharat
>
>
--
-Bharat
2140
days inactive
2144
days old
11 comments
3 participants
participants (3)
-
bharat singh -
Daniel Gryniewicz -
Malahal Naineni