linux-kernel - Re: XFS filesystem corruption on the arm(el) architecture

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Message-ID: <20081019090702.GA1925@infradead.org>
Date:	Sun, 19 Oct 2008 05:07:02 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Eric Sandeen <sandeen@...deen.net>
Cc:	Martin Michlmayr <tbm@...ius.com>, Tobias Frost <tobi@...dtobi.de>,
	linux-kernel@...r.kernel.org, debian-arm@...ts.debian.org,
	xfs@....sgi.com, kernel@...tstofly.org,
	Hiroki KUMAGAI <hiroki.kumagai@...hiba.co.jp>
Subject: Re: XFS filesystem corruption on the arm(el) architecture

On Sat, Oct 18, 2008 at 10:06:45PM -0500, Eric Sandeen wrote:
> This is probably the vmap cache aliasing problem that we paid a bit of
> attention to a few months ago, no?

Shouldn't the cachepolicy switch take care of that?  But yes, there
are various problems with I/O on vmap regions with virtually indexed
caches, see:

	http://www.spinics.net/lists/linux-arch/msg04301.html

	http://tree.celinuxforum.org/CelfPubWiki/JapanTechnicalJamboree21?action=AttachFile&do=get&target=celf_discussions.pdf

Actually, looking again at the second document it shows exactly the
symptoms you're seeing.


> 
> -Eric
> 
> 
---end quoted text---
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