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[PATCH] More page migration: do not inc/dec rss counters

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If we install a migration entry then the rss not really decreases since the
page is just moved somewhere else.  We can save ourselves the work of
decrementing and later incrementing which will just eventually cause cacheline
bouncing.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Christoph Lameter
2006-06-23 02:03:38 -07:00
committed by Linus Torvalds
parent 6c5240ae7f
commit 442c9137de
2 changed files with 1 additions and 2 deletions
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1
mm/migrate.c
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@@ -164,7 +164,6 @@ static void remove_migration_pte(struct vm_area_struct *vma, unsigned long addr,
if (!is_migration_entry(entry) || migration_entry_to_page(entry) != old)
goto out;
inc_mm_counter(mm, anon_rss);
get_page(new);
pte = pte_mkold(mk_pte(new, vma->vm_page_prot));
if (is_write_migration_entry(entry))