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authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>2007-10-16 01:25:43 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-16 09:42:59 -0700
commit97ee052461446526e1de7236497e6f1b1ffedf8c (patch)
tree7c91270577191ed32de22d8183695c1354d555c8
parent4106f83a9f86afc423557d0d92ebf4b3f36728c1 (diff)
downloadop-kernel-dev-97ee052461446526e1de7236497e6f1b1ffedf8c.zip
op-kernel-dev-97ee052461446526e1de7236497e6f1b1ffedf8c.tar.gz
flush cache before installing new page at migraton
In migration, a new page should be cache flushed before set_pte() in some archs which have virtually-tagged cache. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Christoph Lameter <clameter@sgi.com> Cc: Hugh Dickins <hugh@veritas.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--mm/migrate.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/migrate.c b/mm/migrate.c
index 71c38b4..ea11ddb 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -171,6 +171,7 @@ static void remove_migration_pte(struct vm_area_struct *vma,
pte = pte_mkold(mk_pte(new, vma->vm_page_prot));
if (is_write_migration_entry(entry))
pte = pte_mkwrite(pte);
+ flush_cache_page(vma, addr, pte_pfn(pte));
set_pte_at(mm, addr, ptep, pte);
if (PageAnon(new))
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