From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 62751] INFO: rcu_sched detected stalls on CPUs/tasks: { 3}
(detected by 2, t=15107 jiffies, g=270766, c=270765, q=0)
Date: Wed, 09 Oct 2013 20:53:49 +0000
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https://bugzilla.kernel.org/show_bug.cgi?id=62751
Jan Kara changed:
What |Removed |Added
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CC| |jack@suse.cz
--- Comment #3 from Jan Kara ---
Thanks. This looks like a problem in the shrinker for ext4 extent cache.
Apparently we burn too much time (the longest stall is over 2 seconds)
searching and freeing extents without giving CPU a break. Ideally we should
make the shrinker more efficient (since I don't believe it was called with so
many entries to free) but if that won't work out easily, we should at least
sprinkle some cond_resched() into the shrinker code as a band aid. I'll see
what we can do.
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