diff options
| author | Andrea Arcangeli <aarcange@redhat.com> | 2011-01-14 02:47:16 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-14 04:32:47 +0300 |
| commit | 37c2ac7872a9387542616f658d20ac25f5bdb32e (patch) | |
| tree | d115915db4a61e261012bf0f9c4cf14630243d71 /mm/memcontrol.c | |
| parent | 91600e9e592e48736e630851c83da2ad6bf0e91f (diff) | |
| download | linux-37c2ac7872a9387542616f658d20ac25f5bdb32e.tar.xz | |
thp: compound_trans_order
Read compound_trans_order safe. Noop for CONFIG_TRANSPARENT_HUGEPAGE=n.
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memcontrol.c')
| -rw-r--r-- | mm/memcontrol.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index f4ea3410fb4d..741206ffdace 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1027,10 +1027,6 @@ mem_cgroup_get_reclaim_stat_from_page(struct page *page) { struct page_cgroup *pc; struct mem_cgroup_per_zone *mz; - int page_size = PAGE_SIZE; - - if (PageTransHuge(page)) - page_size <<= compound_order(page); if (mem_cgroup_disabled()) return NULL; @@ -2286,8 +2282,10 @@ static int mem_cgroup_charge_common(struct page *page, struct mm_struct *mm, int ret; int page_size = PAGE_SIZE; - if (PageTransHuge(page)) + if (PageTransHuge(page)) { page_size <<= compound_order(page); + VM_BUG_ON(!PageTransHuge(page)); + } pc = lookup_page_cgroup(page); /* can happen at boot */ @@ -2558,8 +2556,10 @@ __mem_cgroup_uncharge_common(struct page *page, enum charge_type ctype) if (PageSwapCache(page)) return NULL; - if (PageTransHuge(page)) + if (PageTransHuge(page)) { page_size <<= compound_order(page); + VM_BUG_ON(!PageTransHuge(page)); + } count = page_size >> PAGE_SHIFT; /* |