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

To: dean gaudet <dean@xxxxxxxxxx>
Subject: [Xen-devel] Re: Interaction between Xen and XFS: stray RW mappings
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Mon, 22 Oct 2007 11:32:57 -0700
Cc: Nick Piggin <nickpiggin@xxxxxxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Morten , David Chinner <dgc@xxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Bøgeskov <xen-users@xxxxxxxxxxxxxxxxxx>, xfs@xxxxxxxxxxx, xfs-masters@xxxxxxxxxxx, Mark Williamson <mark.williamson@xxxxxxxxxxxx>
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dean gaudet wrote:
> sounds like a bug in xen to me :)
>   

I explained at the head of this thread how and why Xen works in this
manner.  It's certainly a change from native execution; whether you
consider it to be a bug is a different matter.

But it turns out that leaving stray mappings around on pages which get
later used in special ways is a bad idea, and can manifest in all kinds
of random unpleasant ways.  Getting a clear error out of Xen is probably
nicest way to discover and debug this problem.

    J

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