linux-kernel - Re: Why is kslowd accumulating so much CPU time?

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Message-ID: <21934.1276109812@redhat.com>
Date:	Wed, 09 Jun 2010 19:56:52 +0100
From:	David Howells <dhowells@...hat.com>
To:	"Theodore Ts'o" <tytso@....edu>
Cc:	dhowells@...hat.com, Dave Airlie <airlied@...hat.com>,
	linux-kernel@...r.kernel.org
Subject: Re: Why is kslowd accumulating so much CPU time?

Theodore Ts'o <tytso@....edu> wrote:

> Is there any way to easily see what is scheduling themselves to use the
> slow workqueue?

Slow work has debugging.  Turn on:

	CONFIG_SLOW_WORK_DEBUG=y

then do:

	watch -n0 cat /sys/kernel/debug/slow_work/runqueue

David
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