On 10/31/2014 08:25 AM, Joonsoo Kim wrote:
All the caller of __free_one_page() has similar freepage counting logic,
so we can move it to __free_one_page(). This reduce line of code and help
future maintenance. This is also preparation step for "mm/page_alloc:
restrict max order of merging on isolated pageblock" which fix the
freepage counting problem on freepage with more than pageblock order.
Changes from v4:
Only freepage counting logic is moved. Others remains as is.
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Looks like most of the cleanup was still possible, especially getting
rid of the skip_counting labels is nice.
Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
---
mm/page_alloc.c | 14 +++-----------
1 file changed, 3 insertions(+), 11 deletions(-)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 6df23fe..2bc7768 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -579,6 +579,8 @@ static inline void __free_one_page(struct page *page,
return;
VM_BUG_ON(migratetype == -1);
+ if (!is_migrate_isolate(migratetype))
+ __mod_zone_freepage_state(zone, 1 << order, migratetype);
page_idx = pfn & ((1 << MAX_ORDER) - 1);
@@ -725,14 +727,9 @@ static void free_pcppages_bulk(struct zone *zone, int count,
/* must delete as __free_one_page list manipulates */
list_del(&page->lru);
mt = get_freepage_migratetype(page);
- if (unlikely(has_isolate_pageblock(zone))) {
+ if (unlikely(has_isolate_pageblock(zone)))
mt = get_pageblock_migratetype(page);
- if (is_migrate_isolate(mt))
- goto skip_counting;
- }
- __mod_zone_freepage_state(zone, 1, mt);
-skip_counting:
/* MIGRATE_MOVABLE list may include MIGRATE_RESERVEs */
__free_one_page(page, page_to_pfn(page), zone, 0, mt);
trace_mm_page_pcpu_drain(page, 0, mt);
@@ -755,12 +752,7 @@ static void free_one_page(struct zone *zone,
if (unlikely(has_isolate_pageblock(zone) ||
is_migrate_isolate(migratetype))) {
migratetype = get_pfnblock_migratetype(page, pfn);
- if (is_migrate_isolate(migratetype))
- goto skip_counting;
}
- __mod_zone_freepage_state(zone, 1 << order, migratetype);
-
-skip_counting:
__free_one_page(page, pfn, zone, order, migratetype);
spin_unlock(&zone->lock);
}
--
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