linux-kernel - Re: [PATCH] mm: fix page_mkclean_one (was: 2.6.19 file content corruption on ext3)

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Date:	Thu, 21 Dec 2006 02:17:05 -0700
From:	"Gordon Farquharson" <gordonfarquharson@...il.com>
To:	"Linus Torvalds" <torvalds@...l.org>
Cc:	"Martin Michlmayr" <tbm@...ius.com>,
	"Peter Zijlstra" <a.p.zijlstra@...llo.nl>,
	"Hugh Dickins" <hugh@...itas.com>,
	"Nick Piggin" <nickpiggin@...oo.com.au>,
	"Arjan van de Ven" <arjan@...radead.org>,
	"Andrei Popa" <andrei.popa@...eo.ro>,
	"Andrew Morton" <akpm@...l.org>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	"Florian Weimer" <fw@...eb.enyo.de>,
	"Marc Haber" <mh+linux-kernel@...schlus.de>,
	"Martin Schwidefsky" <schwidefsky@...ibm.com>,
	"Heiko Carstens" <heiko.carstens@...ibm.com>,
	"Arnd Bergmann" <arnd.bergmann@...ibm.com>
Subject: Re: [PATCH] mm: fix page_mkclean_one (was: 2.6.19 file content corruption on ext3)

On 12/21/06, Linus Torvalds <torvalds@...l.org> wrote:

> That said, I think the patch I sent out should actually work on top of
> plain 2.6.19 too. I don't think things have changed in this area that
> much. IOW, you don't _need_ latest -git to test it, you just need a broken
> kernel ;)

I created a version of your patch that applied to 2.6.19, but it
doesn't compile:

mm/built-in.o: In function `cancel_dirty_page':
slab.c:(.text+0x8964): undefined reference to `task_io_account_cancelled_write'
make[3]: *** [.tmp_vmlinux1] Error 1

It looks like task_io_account_cancelled_write() was added in

http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=7c3ab7381e79dfc7db14a67c6f4f3285664e1ec2

Can the call to task_io_account_cancelled_write() simply be removed
from cancel_dirty_page() for testing the patch with 2.6.19 (since
2.6.19 doesn't seem to have the task I/O accounting) ?

Gordon

-- 
Gordon Farquharson
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