From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 107301] system hang during ext4 xattr operation
Date: Thu, 05 Nov 2015 17:02:57 +0000
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https://bugzilla.kernel.org/show_bug.cgi?id=107301
Jan Kara changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |NEEDINFO
--- Comment #1 from Jan Kara ---
Hum, from the stack traces in the log it seems mb_cache_entry_alloc() is racing
with other operations on the LRU and restarting all the time. Another
possibility is that there are lots of entries in the LRU and it takes a long
time to scan (if I remember right ceph is a heavy user of xattrs).
The first problem would be easily fixed by adding cond_resched() at appropriate
place, the second problem would require more intrusive changes in how LRU is
handled.
Can you reproduce the issue?
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