linux-kernel - Re: 2.6.19 file content corruption on ext3

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Message-Id: <20061218134342.1ae02f75.akpm@osdl.org>
Date:	Mon, 18 Dec 2006 13:43:42 -0800
From:	Andrew Morton <akpm@...l.org>
To:	Linus Torvalds <torvalds@...l.org>
Cc:	Andrei Popa <andrei.popa@...eo.ro>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Hugh Dickins <hugh@...itas.com>,
	Florian Weimer <fw@...eb.enyo.de>,
	Marc Haber <mh+linux-kernel@...schlus.de>,
	Martin Michlmayr <tbm@...ius.com>
Subject: Re: 2.6.19 file content corruption on ext3

On Mon, 18 Dec 2006 12:14:35 -0800 (PST)
Linus Torvalds <torvalds@...l.org> wrote:

> OR:
> 
>  - page_mkclean_one() is simply buggy.
> 
> And I'm starting to wonder about the second case. But it all LOOKS really 
> fine - I can't see anything wrong there (it uses the extremely 
> conservative "ptep_get_and_clear()", and seems to flush everything right 
> too, through "ptep_establish()").

What does the call to page_check_address() in there do?

It'd be good to have a printk in there to see if it's triggering.

Is this all correct for non-linear VMAs?  (rtorrent doesn't use
MAP_NONLINEAR though).
-
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