[Nfs-ganesha-devel] Change in ffilz/nfs-ganesha[next]: MDCACHE: Replace chunk accounting with dirent accounting

From Frank Filz <ffilzlnx(a)mindspring.com&gt;: Frank Filz has uploaded this change for review. ( https://review.gerrithub.io/414889 Change subject: MDCACHE: Replace chunk accounting with dirent accounting ...................................................................... MDCACHE: Replace chunk accounting with dirent accounting Things may not go well if there are lots of dirents cached without corresponding cached handles and attributes. One solution would have been to change the default for chunks_hwmark to entries_hwmark / avl_chunk, but that would be 750, which seems awfully small if there are lots of small directories. So instead of having two config params, we just count dirents and limit them to entries_hwmark. If we are trying to get a new chunk, we try and reserve avl_chunk number of entries from dirents_used. If that goes over entries_hwmark, then we keep reaping chunks until we are in limit. That may overreap if we are in fact filling a small chunk, but that shouldn't be too much of an issue. When we add detached dirents, we try and reap a detached dirent from the same directory first, and only if there are none do we reap a chunk to free up dirents. When adding dirents to chunks for FSALs that support that, and we aren't goint to split the chunk and we go over, we again reap a chunk. Change-Id: I94f4666a903f8246705745160b8186b6cc10c2d2 Signed-off-by: Frank S. Filz <ffilzlnx(a)mindspring.com&gt; --- M src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_ext.h M src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_helpers.c M src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_lru.c M src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_lru.h M src/FSAL/Stackable_FSALs/FSAL_MDCACHE/mdcache_read_conf.c 5 files changed, 149 insertions(+), 38 deletions(-) git pull ssh://review.gerrithub.io:29418/ffilz/nfs-ganesha refs/changes/89/414889/1 -- To view, visit https://review.gerrithub.io/414889 To unsubscribe, or for help writing mail filters, visit https://review.gerrithub.io/settings Gerrit-Project: ffilz/nfs-ganesha Gerrit-Branch: next Gerrit-MessageType: newchange Gerrit-Change-Id: I94f4666a903f8246705745160b8186b6cc10c2d2 Gerrit-Change-Number: 414889 Gerrit-PatchSet: 1 Gerrit-Owner: Frank Filz <ffilzlnx(a)mindspring.com&gt;