+ mm-do-not-drain-pagevecs-for-mlockallmcl_future.patch added to -mm tree

[akpm@xxxxxxxxxx]

The patch titled
     Subject: mm: do not drain pagevecs for mlockall(MCL_FUTURE)
has been added to the -mm tree.  Its filename is
     mm-do-not-drain-pagevecs-for-mlockallmcl_future.patch

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------------------------------------------------------
From: Christoph Lameter <cl@xxxxxxxxxx>
Subject: mm: do not drain pagevecs for mlockall(MCL_FUTURE)

MCL_FUTURE does not move pages between lru list and draining the LRU per
cpu pagevecs is a nasty activity.  Avoid doing it unecessarily.

Signed-off-by: Christoph Lameter <cl@xxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Reviewed-by: Minchan Kim <minchan.kim@xxxxxxxxx>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Cc: Mel Gorman <mel@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxx>
---

 mm/mlock.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff -puN mm/mlock.c~mm-do-not-drain-pagevecs-for-mlockallmcl_future mm/mlock.c
--- a/mm/mlock.c~mm-do-not-drain-pagevecs-for-mlockallmcl_future
+++ a/mm/mlock.c
@@ -549,7 +549,8 @@ SYSCALL_DEFINE1(mlockall, int, flags)
 	if (!can_do_mlock())
 		goto out;
 
-	lru_add_drain_all();	/* flush pagevec */
+	if (flags & MCL_CURRENT)
+		lru_add_drain_all();	/* flush pagevec */
 
 	down_write(&current->mm->mmap_sem);
 
_
Subject: Subject: mm: do not drain pagevecs for mlockall(MCL_FUTURE)

Patches currently in -mm which might be from cl@xxxxxxxxxx are

origin.patch
linux-next.patch
mm-do-not-drain-pagevecs-for-mlockallmcl_future.patch

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