page allocator: calculate the migratetype for allocation only once
GFP mask is converted into a migratetype when deciding which pagelist to
take a page from. However, it is happening multiple times per allocation,
at least once per zone traversed. Calculate it once.
Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Dave Hansen <dave@linux.vnet.ibm.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 8fc6d1f..d3be076 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1061,13 +1061,13 @@
* or two.
*/
static struct page *buffered_rmqueue(struct zone *preferred_zone,
- struct zone *zone, int order, gfp_t gfp_flags)
+ struct zone *zone, int order, gfp_t gfp_flags,
+ int migratetype)
{
unsigned long flags;
struct page *page;
int cold = !!(gfp_flags & __GFP_COLD);
int cpu;
- int migratetype = allocflags_to_migratetype(gfp_flags);
again:
cpu = get_cpu();
@@ -1389,7 +1389,7 @@
static struct page *
get_page_from_freelist(gfp_t gfp_mask, nodemask_t *nodemask, unsigned int order,
struct zonelist *zonelist, int high_zoneidx, int alloc_flags,
- struct zone *preferred_zone)
+ struct zone *preferred_zone, int migratetype)
{
struct zoneref *z;
struct page *page = NULL;
@@ -1433,7 +1433,8 @@
}
}
- page = buffered_rmqueue(preferred_zone, zone, order, gfp_mask);
+ page = buffered_rmqueue(preferred_zone, zone, order,
+ gfp_mask, migratetype);
if (page)
break;
this_zone_full:
@@ -1495,7 +1496,8 @@
static inline struct page *
__alloc_pages_may_oom(gfp_t gfp_mask, unsigned int order,
struct zonelist *zonelist, enum zone_type high_zoneidx,
- nodemask_t *nodemask, struct zone *preferred_zone)
+ nodemask_t *nodemask, struct zone *preferred_zone,
+ int migratetype)
{
struct page *page;
@@ -1513,7 +1515,7 @@
page = get_page_from_freelist(gfp_mask|__GFP_HARDWALL, nodemask,
order, zonelist, high_zoneidx,
ALLOC_WMARK_HIGH|ALLOC_CPUSET,
- preferred_zone);
+ preferred_zone, migratetype);
if (page)
goto out;
@@ -1534,7 +1536,7 @@
__alloc_pages_direct_reclaim(gfp_t gfp_mask, unsigned int order,
struct zonelist *zonelist, enum zone_type high_zoneidx,
nodemask_t *nodemask, int alloc_flags, struct zone *preferred_zone,
- unsigned long *did_some_progress)
+ int migratetype, unsigned long *did_some_progress)
{
struct page *page = NULL;
struct reclaim_state reclaim_state;
@@ -1567,7 +1569,8 @@
if (likely(*did_some_progress))
page = get_page_from_freelist(gfp_mask, nodemask, order,
zonelist, high_zoneidx,
- alloc_flags, preferred_zone);
+ alloc_flags, preferred_zone,
+ migratetype);
return page;
}
@@ -1587,14 +1590,15 @@
static inline struct page *
__alloc_pages_high_priority(gfp_t gfp_mask, unsigned int order,
struct zonelist *zonelist, enum zone_type high_zoneidx,
- nodemask_t *nodemask, struct zone *preferred_zone)
+ nodemask_t *nodemask, struct zone *preferred_zone,
+ int migratetype)
{
struct page *page;
do {
page = get_page_from_freelist(gfp_mask, nodemask, order,
zonelist, high_zoneidx, ALLOC_NO_WATERMARKS,
- preferred_zone);
+ preferred_zone, migratetype);
if (!page && gfp_mask & __GFP_NOFAIL)
congestion_wait(WRITE, HZ/50);
@@ -1617,7 +1621,8 @@
static inline struct page *
__alloc_pages_slowpath(gfp_t gfp_mask, unsigned int order,
struct zonelist *zonelist, enum zone_type high_zoneidx,
- nodemask_t *nodemask, struct zone *preferred_zone)
+ nodemask_t *nodemask, struct zone *preferred_zone,
+ int migratetype)
{
const gfp_t wait = gfp_mask & __GFP_WAIT;
struct page *page = NULL;
@@ -1668,7 +1673,8 @@
*/
page = get_page_from_freelist(gfp_mask, nodemask, order, zonelist,
high_zoneidx, alloc_flags,
- preferred_zone);
+ preferred_zone,
+ migratetype);
if (page)
goto got_pg;
@@ -1678,7 +1684,8 @@
/* Do not dip into emergency reserves if specified */
if (!(gfp_mask & __GFP_NOMEMALLOC)) {
page = __alloc_pages_high_priority(gfp_mask, order,
- zonelist, high_zoneidx, nodemask, preferred_zone);
+ zonelist, high_zoneidx, nodemask, preferred_zone,
+ migratetype);
if (page)
goto got_pg;
}
@@ -1696,7 +1703,7 @@
zonelist, high_zoneidx,
nodemask,
alloc_flags, preferred_zone,
- &did_some_progress);
+ migratetype, &did_some_progress);
if (page)
goto got_pg;
@@ -1708,7 +1715,8 @@
if ((gfp_mask & __GFP_FS) && !(gfp_mask & __GFP_NORETRY)) {
page = __alloc_pages_may_oom(gfp_mask, order,
zonelist, high_zoneidx,
- nodemask, preferred_zone);
+ nodemask, preferred_zone,
+ migratetype);
if (page)
goto got_pg;
@@ -1755,6 +1763,7 @@
enum zone_type high_zoneidx = gfp_zone(gfp_mask);
struct zone *preferred_zone;
struct page *page;
+ int migratetype = allocflags_to_migratetype(gfp_mask);
lockdep_trace_alloc(gfp_mask);
@@ -1779,11 +1788,11 @@
/* First allocation attempt */
page = get_page_from_freelist(gfp_mask|__GFP_HARDWALL, nodemask, order,
zonelist, high_zoneidx, ALLOC_WMARK_LOW|ALLOC_CPUSET,
- preferred_zone);
+ preferred_zone, migratetype);
if (unlikely(!page))
page = __alloc_pages_slowpath(gfp_mask, order,
zonelist, high_zoneidx, nodemask,
- preferred_zone);
+ preferred_zone, migratetype);
return page;
}