The patch titled
memory hotplug: make pages from movable zone always isolatable
has been added to the -mm tree. Its filename is
memory-hotplug-make-pages-from-movable-zone-always-isolatable.patch
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Subject: memory hotplug: make pages from movable zone always isolatable
From: Shaohua Li <shaohua.li@xxxxxxxxx>
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@xxxxxxxxx>
Cc: Mel Gorman <mel@xxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxxxxxxxxxxxxx>
Cc: Yakui Zhao <yakui.zhao@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff -puN mm/page_alloc.c~memory-hotplug-make-pages-from-movable-zone-always-isolatable mm/page_alloc.c
--- a/mm/page_alloc.c~memory-hotplug-make-pages-from-movable-zone-always-isolatable
+++ a/mm/page_alloc.c
@@ -4905,13 +4905,16 @@ int set_migratetype_isolate(struct 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);
_
Patches currently in -mm which might be from shaohua.li@xxxxxxxxx are
linux-next.patch
memory-hotplug-update-zone-pcp-at-memory-online.patch
memory-hotplug-exclude-isolated-page-from-pco-page-alloc.patch
memory-hotplug-make-pages-from-movable-zone-always-isolatable.patch
memory-hotplug-alloc-page-from-other-node-in-memory-online.patch
memory-hotplug-migrate-swap-cache-page.patch
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