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Re: [Xen-devel] [xen-4.0-testing test] 2032: regressions - FAIL

To: Keir Fraser <Keir.Fraser@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] [xen-4.0-testing test] 2032: regressions - FAIL
From: Ian Campbell <Ian.Campbell@xxxxxxxxxx>
Date: Fri, 20 Aug 2010 08:58:34 +0100
Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
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On Thu, 2010-08-19 at 09:00 +0100, Ian Campbell wrote:
> e73f4 is the merge of, e6b9b is the merge of,
> there are no proper xen.git changesets between the two -- only the
> contents of, which does include some Xen save/restore
> "fixes". has a known issue relating to the new stack guard page which
has prompted a quick with only a couple of patches.

The issue is supposedly PAE and/or HIGHPTE specific but I wonder if it
also has an impact under Xen in other configurations?

The save/restore issue we are seeing seems to relate to an inability to
lock memory for a hypercall and d7824370e26325c881b665350ce64fb0a4fde24a
(the second fix in specifically mentions fixing up a
user-visible mlock change relating to mlock.

I'll try and confirm that, if I can ever manage to get a consistent


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