linux-kernel - Re: [regression] Crash in wb_clear_pending() (was: Linux 2.6.35-rc4)

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Message-ID: <20100705182003.GA12332@infradead.org>
Date:	Mon, 5 Jul 2010 14:20:03 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Christoph Hellwig <hch@...radead.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Jens Axboe <axboe@...nel.dk>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: [regression] Crash in wb_clear_pending() (was: Linux 2.6.35-rc4)

On Mon, Jul 05, 2010 at 07:14:20PM +0200, Ingo Molnar wrote:
> Nor does it apply to v2.6.35-rc4:

It's indeed missing the two previous patches to the writeback code that
I thought Jens sent to Linus aswell [1].  The race was initially found using
a distro kernel with the patches backported, and in the meantime we've
done a lot of testing with this patch (and the two previous that also
were backported).  I'd prefer to get this full stack that's been in
-next for a while and got large machine testing, but if Jens prefers it
I can aim for a smaller variant.  Jens, what version do you prefer?

[1] thee patches are:

 "writeback: remove writeback_inodes_wbc"	a73dd720f081cd160e3843d531eff2195036e442
 "writeback: split writeback_inodes_wb"		9f98c0faa41ae334d894762f556195c8a7fb352f
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