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mm, memory_hotplug/failure: drain single zone pcplists 

Memory hotplug and failure mechanisms have several places where pcplists
are drained so that pages are returned to the buddy allocator and can be
e.g. prepared for offlining.  This is always done in the context of a
single zone, we can reduce the pcplists drain to the single zone, which
is now possible.

The change should make memory offlining due to hotremove or failure
faster and not disturbing unrelated pcplists anymore.

Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Cc: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Cc: Xishi Qiu <qiuxishi@huawei.com>
Cc: Vladimir Davydov <vdavydov@parallels.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Michal Nazarewicz <mina86@mina86.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Vlastimil Babka 2014-12-10 15:43:10 -08:00 committed by Linus Torvalds
parent 510f550788
commit c05543293e
2 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
mm/memory-failure.c
View File

@ -233,7 +233,7 @@ void shake_page(struct page *p, int access)
lru_add_drain_all();
if (PageLRU(p))
return;
drain_all_pages(NULL);
drain_all_pages(page_zone(p));
if (PageLRU(p) || is_free_buddy_page(p))
return;
}
@ -1661,7 +1661,7 @@ static int __soft_offline_page(struct page *page, int flags)
if (!is_free_buddy_page(page))
lru_add_drain_all();
if (!is_free_buddy_page(page))
drain_all_pages(NULL);
drain_all_pages(page_zone(page));
SetPageHWPoison(page);
if (!is_free_buddy_page(page))
pr_info("soft offline: %#lx: page leaked\n",

4
mm/memory_hotplug.c
View File

@ -1725,7 +1725,7 @@ repeat:
if (drain) {
lru_add_drain_all();
cond_resched();
drain_all_pages(NULL);
drain_all_pages(zone);
}
pfn = scan_movable_pages(start_pfn, end_pfn);
@ -1747,7 +1747,7 @@ repeat:
lru_add_drain_all();
yield();
/* drain pcp pages, this is synchronous. */
drain_all_pages(NULL);
drain_all_pages(zone);
/*
* dissolve free hugepages in the memory block before doing offlining
* actually in order to make hugetlbfs's object counting consistent.