Hello Alex, or anyone else affected, Accepted zfs-linux into eoan-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/zfs- linux/0.8.1-1ubuntu14.4 in a few hours, and then in the -proposed repository.
Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users. If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed- eoan to verification-done-eoan. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification- failed-eoan. In either case, without details of your testing we will not be able to proceed. Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping! N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days. ** Changed in: zfs-linux (Ubuntu Eoan) Status: New => Fix Committed -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to zfs-linux in Ubuntu. https://bugs.launchpad.net/bugs/1847832 Title: Backport ZoL pull request 9203 into the official packages. Status in zfs-linux package in Ubuntu: In Progress Status in zfs-linux source package in Eoan: Fix Committed Bug description: == SRU Justification, EOAN == ZFS can deadlock, this can be sometimes triggered with a zfs rollback - "the zfs_resume_fs() code path may cause zfs to spawn new threads as it reinstantiates the suspended fs's zil. When a new thread is spawned, the kernel may attempt to free memory for that thread by freeing some unreferenced inodes. If it happens to select inodes that are a a part of the suspended fs a deadlock will occur because freeing inodes requires holding the fs's z_teardown_inactive_lock which is still held from the suspend." == The Fix == Backport of ZFS upstream commit e7a2fa70c3b0d8c8cee2b484038bb5623c7c1ea9 ("Fix deadlock in 'zfs rollback'") The backport is relatively simple context wiggle. == Test Case == This is hard to trigger so testing is non-trivial. To check for regressions we run the entire Ubuntu ZFS regression test suite. Without the fix rollbacks can very occasionally trip this issue. With the test, it's not possible. == Regression Potential == The fix adds in an extra z_suspended flag to track suspended state and adds an extra reference to stop the kernel from free'ing inodes on a suspected file system. The changes are small and are well-used in upstream ZFS so I believe if a regression was to have occurred it would have been found by the regression testing. --------------------- Original Bug Report Below ------------------- Hopefully this is the correct bug tracker to report this on. Recently, I ran into a bug in ZFS as shipped in Ubuntu 19.10 that caused the kernel to deadlock and the system to eventually hang. I was advised by a ZFS on Linux project maintainer that this was a bug that was fixed in 0.8.2. The relevant pull request is here: https://github.com/zfsonlinux/zfs/pull/9203 It would probably be a good idea to backport that pull request into 19.10's build of ZFS. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1847832/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
