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From: Jeremy Fitzhardinge <jeremy@goop.org>
To: dean gaudet <dean@arctic.org>
Cc: "Nick Piggin" <nickpiggin@yahoo.com.au>,
	"David Chinner" <dgc@sgi.com>,
	xfs@oss.sgi.com, Xen-devel <xen-devel@lists.xensource.com>,
	"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
	"Mark Williamson" <mark.williamson@cl.cam.ac.uk>,
	"Morten Bøgeskov" <xen-users@morten.bogeskov.dk>,
	xfs-masters@oss.sgi.com
Subject: Re: Interaction between Xen and XFS: stray RW mappings
Date: Mon, 22 Oct 2007 11:32:57 -0700	[thread overview]
Message-ID: <471CECD9.3010409@goop.org> (raw)
In-Reply-To: <alpine.DEB.0.9999.0710212128180.2320@twinlark.arctic.org>

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

  parent reply	other threads:[~2007-10-22 18:33 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-10-12 16:58 Interaction between Xen and XFS: stray RW mappings Jeremy Fitzhardinge
2007-10-12 17:08 ` Jeremy Fitzhardinge
2007-10-14 22:56 ` David Chinner
2007-10-14 23:12   ` Jeremy Fitzhardinge
2007-10-14 23:33     ` David Chinner
2007-10-15  4:15     ` Nick Piggin
2007-10-15  0:57       ` Jeremy Fitzhardinge
2007-10-15  7:26         ` Nick Piggin
2007-10-15  3:42           ` Jeremy Fitzhardinge
2007-10-15  4:11             ` David Chinner
2007-10-15  4:18               ` Jeremy Fitzhardinge
2007-10-15  4:25                 ` David Chinner
2007-10-15  8:31                   ` [xfs-masters] " Christoph Hellwig
2007-10-22  3:18       ` dean gaudet
2007-10-22  3:34         ` Jeremy Fitzhardinge
2007-10-22  4:28           ` dean gaudet
2007-10-22  4:39             ` Nick Piggin
2007-10-22 18:37               ` Jeremy Fitzhardinge
2007-10-22 18:32             ` Jeremy Fitzhardinge [this message]
2007-10-22 13:47           ` Andi Kleen
2007-10-22 18:40             ` Jeremy Fitzhardinge
2007-10-22 19:07               ` Andi Kleen
2007-10-22 19:11                 ` Jeremy Fitzhardinge
2007-10-22 22:32                 ` David Chinner
2007-10-22 23:35                   ` Andi Kleen
2007-10-23  0:16                     ` Zachary Amsden
2007-10-23  0:36                     ` David Chinner
2007-10-23  7:04                       ` [patch] " David Chinner
2007-10-23  9:30                         ` Andi Kleen
2007-10-23 12:41                           ` David Chinner
2007-10-23 14:33                             ` Jeremy Fitzhardinge
2007-10-24  4:36                           ` [PATCH] Allow lazy unmapping by taking extra page references V2 David Chinner
2007-10-24  5:08                             ` Jeremy Fitzhardinge
2007-10-24 21:48                               ` [PATCH] Allow lazy unmapping by taking extra page references V3 David Chinner
2007-10-24 22:46                                 ` Jeremy Fitzhardinge
2007-10-24 23:21                                   ` David Chinner
2007-10-23  9:28                       ` Interaction between Xen and XFS: stray RW mappings Andi Kleen
2007-10-15  9:36   ` Andi Kleen
2007-10-15 14:56     ` Nick Piggin
2007-10-15 11:07       ` Andi Kleen
2007-10-15 11:28         ` Nick Piggin
2007-10-15 12:54           ` Andi Kleen
2007-10-21 12:17             ` Dave Airlie
2007-10-21 22:16         ` Benjamin Herrenschmidt
2007-10-22  9:49           ` Andi Kleen

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