From: Doug Doan <dougd@cray.com>
Date: Tue, 10 Aug 2010 00:18:30 +0000 (-0700)
Subject: hugetlb: call mmu notifiers on hugepage cow
X-Git-Tag: v2.6.36-rc1~475
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3edd4fc9537d95e460d502987c63a90d6b9a7a82;p=pandora-kernel.git

hugetlb: call mmu notifiers on hugepage cow

When a copy-on-write occurs, we take one of two paths in handle_mm_fault:
through handle_pte_fault for normal pages, or through hugetlb_fault for
huge pages.

In the normal page case, we eventually get to do_wp_page and call mmu
notifiers via ptep_clear_flush_notify.  There is no callout to the mmmu
notifiers in the huge page case.  This patch fixes that.

Signed-off-by: Doug Doan <dougd@cray.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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