diff options
| author | Joonsoo Kim <iamjoonsoo.kim@lge.com> | 2016-07-26 15:23:43 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-07-26 16:19:19 -0700 |
| commit | 83358ece26b70f20c0ba2e0e00dc84b0ee24fe6d (patch) | |
| tree | 17c1a4620b524345a45d90239413e5e87d3e7b5e /mm/page_isolation.c | |
| parent | 66c64223ad4e7a4a9161fcd9606426d9f57227ca (diff) | |
| download | lwn-83358ece26b70f20c0ba2e0e00dc84b0ee24fe6d.tar.gz lwn-83358ece26b70f20c0ba2e0e00dc84b0ee24fe6d.zip | |
mm/page_owner: initialize page owner without holding the zone lock
It's not necessary to initialized page_owner with holding the zone lock.
It would cause more contention on the zone lock although it's not a big
problem since it is just debug feature. But, it is better than before
so do it. This is also preparation step to use stackdepot in page owner
feature. Stackdepot allocates new pages when there is no reserved space
and holding the zone lock in this case will cause deadlock.
Link: http://lkml.kernel.org/r/1464230275-25791-2-git-send-email-iamjoonsoo.kim@lge.com
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Alexander Potapenko <glider@google.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Michal Hocko <mhocko@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_isolation.c')
| -rw-r--r-- | mm/page_isolation.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/mm/page_isolation.c b/mm/page_isolation.c index 612122bf6a42..927f5ee24c87 100644 --- a/mm/page_isolation.c +++ b/mm/page_isolation.c @@ -7,6 +7,7 @@ #include <linux/pageblock-flags.h> #include <linux/memory.h> #include <linux/hugetlb.h> +#include <linux/page_owner.h> #include "internal.h" #define CREATE_TRACE_POINTS @@ -108,8 +109,6 @@ static void unset_migratetype_isolate(struct page *page, unsigned migratetype) if (pfn_valid_within(page_to_pfn(buddy)) && !is_migrate_isolate_page(buddy)) { __isolate_free_page(page, order); - kernel_map_pages(page, (1 << order), 1); - set_page_refcounted(page); isolated_page = page; } } @@ -128,8 +127,12 @@ static void unset_migratetype_isolate(struct page *page, unsigned migratetype) zone->nr_isolate_pageblock--; out: spin_unlock_irqrestore(&zone->lock, flags); - if (isolated_page) + if (isolated_page) { + kernel_map_pages(page, (1 << order), 1); + set_page_refcounted(page); + set_page_owner(page, order, __GFP_MOVABLE); __free_pages(isolated_page, order); + } } static inline struct page * |