From: Rusty Russell <rusty@rustcorp.com.au>
Date: Tue, 31 Mar 2009 03:55:23 +0000 (-0600)
Subject: lguest: wire up pte_update/pte_update_defer
X-Git-Tag: v2.6.30-rc1~605^2~3
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b7ff99ea53cd16de8f6166c0e98f19a7c6ca67ee;p=pandora-kernel.git

lguest: wire up pte_update/pte_update_defer

Impact: intermittent guest segv/crash fix

I've been seeing random guest bad address crashes and segmentation faults:
bisect led to 4f98a2fee8 (vmscan: split LRU lists into anon & file sets),
but that's a red herring.

It turns out that lguest never hooked up the pte_update/pte_update_defer
calls, so our ptes were not always in sync.  After the vmscan commit, the
bug became reproducible; now a fsck in a 64MB guest causes reproducible
pagetable corruption.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: jeremy@xensource.com
Cc: virtualization@lists.osdl.org
Cc: stable@kernel.org
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