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Message-ID: <bug-62751-13602-2unXrZLIn4@https.bugzilla.kernel.org/> Date: Wed, 09 Oct 2013 20:53:49 +0000 From: bugzilla-daemon@...zilla.kernel.org To: linux-ext4@...r.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) https://bugzilla.kernel.org/show_bug.cgi?id=62751 Jan Kara <jack@...e.cz> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jack@...e.cz --- Comment #3 from Jan Kara <jack@...e.cz> --- 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. -- You are receiving this mail because: You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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