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| author | Shaohua Li <shaohua.li@intel.com> | 2009-09-21 17:01:18 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-22 07:17:26 -0700 |
| commit | 8e7e40d9658cf7b2ae2b76484e235799b3ddaa97 (patch) | |
| tree | 7dfc66d7878d5d4df8f29c56f9195f653626c378 /mm/page_alloc.c | |
| parent | 6fb332fabd7288af9dbe7992394aa6ba97c1a537 (diff) | |
| download | lwn-8e7e40d9658cf7b2ae2b76484e235799b3ddaa97.tar.gz lwn-8e7e40d9658cf7b2ae2b76484e235799b3ddaa97.zip | |
memory hotplug: make pages from movable zone always isolatable
Pages on movable zone have two types, MIGRATE_MOVABLE and MIGRATE_RESERVE,
both them can be movable, because only movable memory allocation can get
pages from movable zone. This makes pages in movable zone always be able
to migrate.
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: Yakui Zhao <yakui.zhao@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 8a8302711725..7b4d4e4ea64f 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -4906,13 +4906,16 @@ int set_migratetype_isolate(struct page *page) struct zone *zone; unsigned long flags; int ret = -EBUSY; + int zone_idx; zone = page_zone(page); + zone_idx = zone_idx(zone); spin_lock_irqsave(&zone->lock, flags); /* * In future, more migrate types will be able to be isolation target. */ - if (get_pageblock_migratetype(page) != MIGRATE_MOVABLE) + if (get_pageblock_migratetype(page) != MIGRATE_MOVABLE && + zone_idx != ZONE_MOVABLE) goto out; set_pageblock_migratetype(page, MIGRATE_ISOLATE); move_freepages_block(zone, page, MIGRATE_ISOLATE); |