Including 2.2.2-0ubuntu10.debdiff for updates.
** Also affects: zfs-linux (Ubuntu Noble)
Importance: Undecided
Status: New
** Description changed:
+ SRU Justification
+
+ [Impact]
+
+ * High load averages when activating autotrim. Logs included below SRU
+ justification
+
+ [Fix]
+
+ * Cherry-pick a0aa7a2ee3b5: "Autotrim High Load Average Fix"
+
+ [Test Plan]
+
+ * Compile tested
+ * Run through autopkgtest regression tests
+
+ [Regression potential]
+
+ * Changes isolated, minimal regression risk. Changes already in upstream
+ ZFS
+
When activating the autotrim feature on any ZFS version starting from
2.2.0 this will lead to a permanent increase of the load average (as
diplayed in top) due to an uninterruptible vdev_autotrim thread for each
vdev capable of TRIM.
This issue has been reported
(https://github.com/openzfs/zfs/issues/15453) as well as fixed
(https://github.com/openzfs/zfs/pull/15781) upstream but the fix is not
yet backported to Ubuntu.
Since this bug was introduced with version 2.2.0 both mantic as well as
noble are affected.
How to reproduce:
1. Create a pool with at least one TRIM-capable device
2. run "zpool set autotrim=on <pool>"
3. watch the output of "top" or "runtime" and see how the load average
increases permanently even when the system is idle by one per vdev
4. running "ps aux | grep -w D" will show the broken threads:
[root@test ~]# ps aux | grep -w D\<
root 7193 0.0 0.0 0 0 ? D< 13:07 0:00
[vdev_autotrim]
** Patch added: "2.2.2-0ubuntu10.debdiff"
https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/2057693/+attachment/5841548/+files/2.2.2-0ubuntu10.debdiff
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https://bugs.launchpad.net/bugs/2057693
Title:
Activating autotrim results in high load average due to
uninterruptible threads
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