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

To: Eric Sandeen <sandeen@xxxxxxxxxxx>
Subject: Re: XFS filesystem corruption on the arm(el) architecture
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Sun, 19 Oct 2008 05:07:02 -0400
Cc: Martin Michlmayr <tbm@xxxxxxxxxx>, Tobias Frost <tobi@xxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, debian-arm@xxxxxxxxxxxxxxxx, xfs@xxxxxxxxxxx, kernel@xxxxxxxxxxxxxx, Hiroki KUMAGAI <hiroki.kumagai@xxxxxxxxxxxxx>
In-reply-to: <48FAA445.9050800@xxxxxxxxxxx>
References: <1222893502.5020.40.camel@moria> <20081002004556.GB30001@disturbed> <48E4213E.9090508@xxxxxxxxxxx> <20081016212500.GA27228@xxxxxxxxxxxxxxxxxxxxxx> <48F7BC9F.4080909@xxxxxxxxxxx> <20081017070109.GA30726@xxxxxxxxxxxxxxxxxxxxxx> <48F89E0F.6030307@xxxxxxxxxxx> <20081018085752.GS25834@xxxxxxxxxxxxxxxxxxxxxx> <20081019014830.GI31761@disturbed> <48FAA445.9050800@xxxxxxxxxxx>
User-agent: Mutt/1.5.18 (2008-05-17)
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:



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

> -Eric
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