xfs_btree_cur leak
Bug #1327360 reported by
Michael S. Fischer
This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
In Progress
|
Medium
|
Unassigned | ||
Precise |
Fix Released
|
Medium
|
Joseph Salisbury |
Bug Description
There appears to be a kernel memory leak of xfs_btree_cur in recent Precise kernels (3.2.0-45 and -63 are affected, for sure). The slab can grow unbounded; we've seen it grow larger than 32GB via slabtop. The affected hosts have XFS mounted on / (root filesystem).
We have another host running 3.2.0-38 in which we do not see this problem (it has a 37TB XFS filesystem mounted, but not on root).
Upgrading to the latest 3.8.0-41 kernel via linux-generic-
Changed in linux (Ubuntu): | |
importance: | Undecided → Medium |
tags: | added: kernel-da-key precise |
Changed in linux (Ubuntu): | |
status: | In Progress → Incomplete |
Changed in linux (Ubuntu Precise): | |
status: | New → In Progress |
importance: | Undecided → Medium |
assignee: | nobody → Joseph Salisbury (jsalisbury) |
Changed in linux (Ubuntu): | |
assignee: | Joseph Salisbury (jsalisbury) → nobody |
status: | Incomplete → In Progress |
Changed in linux (Ubuntu Precise): | |
status: | Fix Committed → Fix Released |
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$ uname -a
Linux REDACTED 3.2.0-45-generic #70-Ubuntu SMP Wed May 29 20:12:06 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
$ sudo grep xfs_btree_cur /proc/slabinfo
xfs_btree_cur 26695461 26695461 208 39 2 : tunables 0 0 0 : slabdata 684499 684499 0
--
$ uname -a
Linux REDACTED 3.8.0-41-generic #60~precise1-Ubuntu SMP Fri May 16 00:18:00 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
$ sudo grep xfs_btree_cur /proc/slabinfo
xfs_btree_cur 936 936 208 39 2 : tunables 0 0 0 : slabdata 24 24 0