Rojin George has uploaded this change for review. ( https://review.gerrithub.io/c/ffilz/nfs-ganesha/+/1193683?usp=email ) Change subject: Handle parallel delegation recalls for the same fsal_objs ...................................................................... Handle parallel delegation recalls for the same fsal_objs There were multiple delegation recalls happening for the same obj. The first thread enters with state lock to recall, once found that it could expire off the client which has gone inactive, we were releasing the state lock and setting DELEG_GRANTED for the state->state_data.deleg.sd_state, before actually expiring the client. This opens up window to the contending async task to acquire the same state lock and crash off, as it started dereferencing the clientid related structures which would have gone stale, as part of the first threads client expire path. This CR avoids such contenders by just cleaning the conflciting state off the expired client to revoke the delegation and if lease reservation fails then we set the state to DELEG_GRANTED so that reaper would be able to clean up the states associated with the expired clients properly. Change-Id: Id3c11ac12f24cc777b2ef95e89e99dc10a5ab958 Signed-off-by: Rojin George <itsmerojin(a)gmail.com&gt; --- M src/FSAL_UP/fsal_up_top.c 1 file changed, 32 insertions(+), 21 deletions(-) git pull ssh://review.gerrithub.io:29418/ffilz/nfs-ganesha refs/changes/83/1193683/1 -- To view, visit https://review.gerrithub.io/c/ffilz/nfs-ganesha/+/1193683?usp=email To unsubscribe, or for help writing mail filters, visit https://review.gerrithub.io/settings?usp=email Gerrit-MessageType: newchange Gerrit-Project: ffilz/nfs-ganesha Gerrit-Branch: next Gerrit-Change-Id: Id3c11ac12f24cc777b2ef95e89e99dc10a5ab958 Gerrit-Change-Number: 1193683 Gerrit-PatchSet: 1 Gerrit-Owner: Rojin George <itsmerojin(a)gmail.com&gt;