The patch titled
Subject: mm/zbud: init user ops only when it is needed
has been added to the -mm tree. Its filename is
mm-zbud-init-user-ops-only-when-it-is-needed.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-zbud-init-user-ops-only-when-it-is-needed.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-zbud-init-user-ops-only-when-it-is-needed.patch
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From: Heesub Shin <heesub.shin@xxxxxxxxxxx>
Subject: mm/zbud: init user ops only when it is needed
When zbud is initialized through the zpool wrapper, pool->ops which
points to user-defined operations is always set regardless of whether it
is specified from the upper layer. This causes zbud_reclaim_page() to
iterate its loop for evicting pool pages out without any gain.
This patch sets the user-defined ops only when it is needed, so that
zbud_reclaim_page() can bail out the reclamation loop earlier if there
is no user-defined operations specified.
Signed-off-by: Heesub Shin <heesub.shin@xxxxxxxxxxx>
Cc: Dan Streetman <ddstreet@xxxxxxxx>
Cc: Seth Jennings <sjennings@xxxxxxxxxxxxxx>
Cc: Sunae Seo <sunae.seo@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/zbud.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/zbud.c~mm-zbud-init-user-ops-only-when-it-is-needed mm/zbud.c
--- a/mm/zbud.c~mm-zbud-init-user-ops-only-when-it-is-needed
+++ a/mm/zbud.c
@@ -132,7 +132,7 @@ static struct zbud_ops zbud_zpool_ops =
static void *zbud_zpool_create(gfp_t gfp, struct zpool_ops *zpool_ops)
{
- return zbud_create_pool(gfp, &zbud_zpool_ops);
+ return zbud_create_pool(gfp, zpool_ops ? &zbud_zpool_ops : NULL);
}
static void zbud_zpool_destroy(void *pool)
_
Patches currently in -mm which might be from heesub.shin@xxxxxxxxxxx are
mm-zbud-init-user-ops-only-when-it-is-needed.patch
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