From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Andi Kleen <andi@firstfloor.org>
Cc: David Miller <davem@davemloft.net>,
byron.bbradley@gmail.com, linux-kernel@vger.kernel.org
Subject: Re: XFS Fails Quality Assurance Tests on ARM
Date: Fri, 28 Sep 2007 07:40:48 +1000 [thread overview]
Message-ID: <200709280740.48723.nickpiggin@yahoo.com.au> (raw)
In-Reply-To: <p73ps12vxrl.fsf@bingen.suse.de>
On Sunday 02 September 2007 08:14, Andi Kleen wrote:
> David Miller <davem@davemloft.net> writes:
> > From: Byron Bradley <byron.bbradley@gmail.com>
> > Date: Fri, 31 Aug 2007 03:12:46 +0000 (UTC)
> >
> > > Anybody got any ideas of how we fix this?
> >
> > I don't know how much testing XFS gets on ARM, but one thing that some
> > ARM chips have is D-cache aliasing problems and one thing XFS uses a
> > lot is virtual remapping of various data structures via vmap().
> >
> > This might be what is causing the problems.
>
> AFAIK XFS uses vmap() mainly during log replay. If David's theory
> was true then the failures must be seen during tests that do
> this.
I think it can also do vmap for directory lookups, and it crashed
in some directory lookup AFAIKS.
One way to verify would be to create the XFS filesystem with PAGE_SIZE
directory blocks (mkfs.xfs -nsize=PAGE_SIZE) I believe. Dave will correct
me if I'm wrong.
next prev parent reply other threads:[~2007-09-28 14:12 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-31 3:12 Byron Bradley
2007-08-31 4:39 ` David Miller
2007-09-01 22:14 ` Andi Kleen
2007-09-27 21:40 ` Nick Piggin [this message]
2007-10-02 7:38 ` David Chinner
2007-10-30 5:47 ` Eric Sandeen
2007-10-30 17:54 ` Christoph Hellwig
2007-10-30 18:14 ` Eric Sandeen
2007-10-30 21:38 ` David Miller
2008-03-18 3:41 ` Eric Sandeen
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