From: Zachary Amsden <zach@vmware.com>
Date: Sun, 6 May 2007 21:49:20 +0000 (-0700)
Subject: i386: use pte_update_defer in ptep_test_and_clear_{dirty,young}
X-Git-Tag: v2.6.22-rc1~982
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0013572b2ae535bfd6314f22d9aef53725ea00d8;p=pandora-kernel.git

i386: use pte_update_defer in ptep_test_and_clear_{dirty,young}

If you actually clear the bit, you need to:

+         pte_update_defer(vma->vm_mm, addr, ptep);

The reason is, when updating PTEs, the hypervisor must be notified.  Using
atomic operations to do this is fine for all hypervisors I am aware of.
However, for hypervisors which shadow page tables, if these PTE
modifications are not trapped, you need a post-modification call to fulfill
the update of the shadow page table.

Acked-by: Zachary Amsden <zach@vmware.com>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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