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author | Ingo Molnar <mingo@elte.hu> | 2010-10-08 07:14:51 (GMT) |
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committer | Ingo Molnar <mingo@elte.hu> | 2010-10-08 07:15:00 (GMT) |
commit | 153db80f8cf74e8700cac96305b6c0b92918f17c (patch) | |
tree | c2afb28e7b3f4fbf0aacd9edd39d7f895321ca0c /mm/page_alloc.c | |
parent | 5fd03ddab7fdbc44bfb2d183a4531c26a8dbca5a (diff) | |
parent | cb655d0f3d57c23db51b981648e452988c0223f9 (diff) | |
download | linux-153db80f8cf74e8700cac96305b6c0b92918f17c.tar.xz |
Merge commit 'v2.6.36-rc7' into core/memblock
Merge reason: Update from -rc3 to -rc7.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'mm/page_alloc.c')
-rw-r--r-- | mm/page_alloc.c | 33 |
1 files changed, 23 insertions, 10 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 768ea48..9536017 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -589,13 +589,13 @@ static void free_pcppages_bulk(struct zone *zone, int count, { int migratetype = 0; int batch_free = 0; + int to_free = count; spin_lock(&zone->lock); zone->all_unreclaimable = 0; zone->pages_scanned = 0; - __mod_zone_page_state(zone, NR_FREE_PAGES, count); - while (count) { + while (to_free) { struct page *page; struct list_head *list; @@ -620,8 +620,9 @@ static void free_pcppages_bulk(struct zone *zone, int count, /* MIGRATE_MOVABLE list may include MIGRATE_RESERVEs */ __free_one_page(page, zone, 0, page_private(page)); trace_mm_page_pcpu_drain(page, 0, page_private(page)); - } while (--count && --batch_free && !list_empty(list)); + } while (--to_free && --batch_free && !list_empty(list)); } + __mod_zone_page_state(zone, NR_FREE_PAGES, count); spin_unlock(&zone->lock); } @@ -632,8 +633,8 @@ static void free_one_page(struct zone *zone, struct page *page, int order, zone->all_unreclaimable = 0; zone->pages_scanned = 0; - __mod_zone_page_state(zone, NR_FREE_PAGES, 1 << order); __free_one_page(page, zone, order, migratetype); + __mod_zone_page_state(zone, NR_FREE_PAGES, 1 << order); spin_unlock(&zone->lock); } @@ -1462,7 +1463,7 @@ int zone_watermark_ok(struct zone *z, int order, unsigned long mark, { /* free_pages my go negative - that's OK */ long min = mark; - long free_pages = zone_page_state(z, NR_FREE_PAGES) - (1 << order) + 1; + long free_pages = zone_nr_free_pages(z) - (1 << order) + 1; int o; if (alloc_flags & ALLOC_HIGH) @@ -1847,6 +1848,7 @@ __alloc_pages_direct_reclaim(gfp_t gfp_mask, unsigned int order, struct page *page = NULL; struct reclaim_state reclaim_state; struct task_struct *p = current; + bool drained = false; cond_resched(); @@ -1865,14 +1867,25 @@ __alloc_pages_direct_reclaim(gfp_t gfp_mask, unsigned int order, cond_resched(); - if (order != 0) - drain_all_pages(); + if (unlikely(!(*did_some_progress))) + return NULL; - if (likely(*did_some_progress)) - page = get_page_from_freelist(gfp_mask, nodemask, order, +retry: + page = get_page_from_freelist(gfp_mask, nodemask, order, zonelist, high_zoneidx, alloc_flags, preferred_zone, migratetype); + + /* + * If an allocation failed after direct reclaim, it could be because + * pages are pinned on the per-cpu lists. Drain them and try again + */ + if (!page && !drained) { + drain_all_pages(); + drained = true; + goto retry; + } + return page; } @@ -2424,7 +2437,7 @@ void show_free_areas(void) " all_unreclaimable? %s" "\n", zone->name, - K(zone_page_state(zone, NR_FREE_PAGES)), + K(zone_nr_free_pages(zone)), K(min_wmark_pages(zone)), K(low_wmark_pages(zone)), K(high_wmark_pages(zone)), |