The patch titled
page allocator: calculate the migratetype for allocation only once
has been removed from the -mm tree. Its filename was
page-allocator-calculate-the-migratetype-for-allocation-only-once.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: page allocator: calculate the migratetype for allocation only once
From: Mel Gorman <mel@xxxxxxxxx>
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@xxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxxxxxxxxxxxxx>
Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Nick Piggin <nickpiggin@xxxxxxxxxxxx>
Cc: Dave Hansen <dave@xxxxxxxxxxxxxxxxxx>
Cc: Lee Schermerhorn <Lee.Schermerhorn@xxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 43 ++++++++++++++++++++++++++-----------------
1 file changed, 26 insertions(+), 17 deletions(-)
diff -puN mm/page_alloc.c~page-allocator-calculate-the-migratetype-for-allocation-only-once mm/page_alloc.c
--- a/mm/page_alloc.c~page-allocator-calculate-the-migratetype-for-allocation-only-once
+++ a/mm/page_alloc.c
@@ -1061,13 +1061,13 @@ void split_page(struct page *page, unsig
* 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 void zlc_mark_zone_full(struct zo
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 @@ zonelist_scan:
}
}
- 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 @@ should_alloc_retry(gfp_t gfp_mask, unsig
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 @@ __alloc_pages_may_oom(gfp_t gfp_mask, un
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 @@ static inline struct page *
__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 @@ __alloc_pages_direct_reclaim(gfp_t gfp_m
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 @@ is_allocation_high_priority(struct task_
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 @@ void wake_all_kswapd(unsigned int order,
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 @@ restart:
*/
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 @@ rebalance:
/* 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 @@ rebalance:
zonelist, high_zoneidx,
nodemask,
alloc_flags, preferred_zone,
- &did_some_progress);
+ migratetype, &did_some_progress);
if (page)
goto got_pg;
@@ -1708,7 +1715,8 @@ rebalance:
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 @@ __alloc_pages_nodemask(gfp_t gfp_mask, u
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 @@ __alloc_pages_nodemask(gfp_t gfp_mask, u
/* 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;
}
_
Patches currently in -mm which might be from mel@xxxxxxxxx are
origin.patch
linux-next.patch
page_alloc-oops-when-setting-percpu_pagelist_fraction.patch
memcg-fix-lru-rotation-in-isolate_pages.patch
add-debugging-aid-for-memory-initialisation-problems.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
