tree fed5a3cf8fc8061967e60b5bbf32e81f3c742822
parent 6afbdd059c27330eccbd85943354f94c2b83a7fe
author Rusty Russell <rusty@rustcorp.com.au> 1238471723 -0600
committer Rusty Russell <rusty@rustcorp.com.au> 1238412324 +1030

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