linux-kernel - Re: Interaction between Xen and XFS: stray RW mappings

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Date:	Sun, 14 Oct 2007 21:18:17 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	David Chinner <dgc@....com>
CC:	Nick Piggin <nickpiggin@...oo.com.au>, xfs@....sgi.com,
	Xen-devel <xen-devel@...ts.xensource.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Mark Williamson <mark.williamson@...cam.ac.uk>,
	Morten Bøgeskov <xen-users@...ten.bogeskov.dk>,
	xfs-masters@....sgi.com
Subject: Re: Interaction between Xen and XFS: stray RW mappings

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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