The patch titled
Subject: mm: page_alloc: simplify drain_zone_pages by using min()
has been added to the -mm tree. Its filename is
mm-page_alloc-simplify-drain_zone_pages-by-using-min.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-page_alloc-simplify-drain_zone_pages-by-using-min.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-page_alloc-simplify-drain_zone_pages-by-using-min.patch
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------------------------------------------------------
From: Michal Nazarewicz <mina86@xxxxxxxxxx>
Subject: mm: page_alloc: simplify drain_zone_pages by using min()
Instead of open-coding getting minimal value of two, just use min macro.
That is why it is there for. While changing the function also change type
of batch local variable to match type of per_cpu_pages::batch (which is
int).
Signed-off-by: Michal Nazarewicz <mina86@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)
diff -puN mm/page_alloc.c~mm-page_alloc-simplify-drain_zone_pages-by-using-min mm/page_alloc.c
--- a/mm/page_alloc.c~mm-page_alloc-simplify-drain_zone_pages-by-using-min
+++ a/mm/page_alloc.c
@@ -1245,15 +1245,11 @@ static int rmqueue_bulk(struct zone *zon
void drain_zone_pages(struct zone *zone, struct per_cpu_pages *pcp)
{
unsigned long flags;
- int to_drain;
- unsigned long batch;
+ int to_drain, batch;
local_irq_save(flags);
batch = ACCESS_ONCE(pcp->batch);
- if (pcp->count >= batch)
- to_drain = batch;
- else
- to_drain = pcp->count;
+ to_drain = min(pcp->count, batch);
if (to_drain > 0) {
free_pcppages_bulk(zone, to_drain, pcp);
pcp->count -= to_drain;
_
Patches currently in -mm which might be from mina86@xxxxxxxxxx are
mm-page_alloc-simplify-drain_zone_pages-by-using-min.patch
mm-compactionc-isolate_freepages_block-small-tuneup.patch
debugging-keep-track-of-page-owners.patch
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