This repository has been archived by the owner on Feb 26, 2020. It is now read-only.
Don't allow shrinking a PF_FSTRANS context #446
Closed
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Avoid deadlocks when entering the shrinker from a PF_FSTRANS context. This patch also reverts commit d0d5dd7 which added MUTEX_FSTRANS. Its use has been deprecated within ZFS as it was an ineffective mechanism to eliminate deadlocks. Among other things, it introduced the need for strict ordering of mutex locking and unlocking in order that the PF_FSTRANS flag wouldn't set incorrectly.
|
This is an adjunct to openzfs/zfs#3225. |
kernelOfTruth
pushed a commit
to kernelOfTruth/spl
that referenced
this pull request
Apr 4, 2015
Avoid deadlocks when entering the shrinker from a PF_FSTRANS context. This patch also reverts commit d0d5dd7 which added MUTEX_FSTRANS. Its use has been deprecated within ZFS as it was an ineffective mechanism to eliminate deadlocks. Among other things, it introduced the need for strict ordering of mutex locking and unlocking in order that the PF_FSTRANS flag wouldn't set incorrectly. Signed-off-by: Tim Chase <tim@chase2k.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes openzfs#446
Sign up for free
to subscribe to this conversation on GitHub.
Already have an account?
Sign in.
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Avoid deadlocks when entering the shrinker from a PF_FSTRANS context.
This patch also reverts commit d0d5dd7
which added MUTEX_FSTRANS. Its use has been deprecated within ZFS as it
was an ineffective mechanism to eliminate deadlocks. Among other things,
it introduced the need for strict ordering of mutex locking and unlocking
in order that the PF_FSTRANS flag wouldn't set incorrectly.