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[xfs-masters] Re: Interaction between Xen and XFS: stray RW mappings

To: David Chinner <dgc@xxxxxxx>
Subject: [xfs-masters] Re: Interaction between Xen and XFS: stray RW mappings
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Sun, 14 Oct 2007 21:18:17 -0700
Cc: Nick Piggin <nickpiggin@xxxxxxxxxxxx>, xfs@xxxxxxxxxxx, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Mark Williamson <mark.williamson@xxxxxxxxxxxx>, Morten Bøgeskov <xen-users@xxxxxxxxxxxxxxxxxx>, xfs-masters@xxxxxxxxxxx
In-reply-to: <20071015041133.GH995458@sgi.com>
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David Chinner wrote:
> With defaults - little effect as vmap should never be used. It's
> only when you start using larger block sizes for metadata that this
> becomes an issue. The CONFIG_XEN workaround should be fine until we
> get a proper vmap cache....

Hm, well I saw the problem with a filesystem made with mkfs.xfs with no
options, so there must be at least *some* vmapping going on there.

    J


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