As additional info, here is the git commit:
commit 7f015072348a14f16d548be557ee58c5c55df0aa
Author: Jeremy Fitzhardinge <[EMAIL PROTECTED]>
Date: Wed Oct 17 13:55:03 2007 +1000
[XFS] eagerly remove vmap mappings to avoid upsetting Xen
XFS leaves stray mappings around when it vmaps memory to make it virtually
contigious. This upsets Xen if one of those pages is being recycled into a
pagetable, since it finds an extra writable mapping of the page.
This patch solves the problem in a brute force way, by making XFS always
eagerly unmap its mappings.
SGI-PV: 971902
SGI-Modid: xfs-linux-melb:xfs-kern:29886a
Signed-off-by: Jeremy Fitzhardinge <[EMAIL PROTECTED]>
Signed-off-by: David Chinner <[EMAIL PROTECTED]>
Signed-off-by: Tim Shimmin <[EMAIL PROTECTED]>
--
stray mappings left behind by xfs make xen kernels crash.
https://bugs.launchpad.net/bugs/164904
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