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| author | Li RongQing <roy.qing.li@gmail.com> | 2016-07-26 15:26:53 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-07-26 16:19:19 -0700 |
| commit | 17408d785a2eda374b7e673afe20309687a63f08 (patch) | |
| tree | 58af47c6e3d8969dfeedd8c90f7f70f0a7e2d09b /mm/memcontrol.c | |
| parent | dd4123f324bbaec7618b677b7bce2b11aee9594e (diff) | |
| download | linux-0-day-17408d785a2eda374b7e673afe20309687a63f08.tar.gz linux-0-day-17408d785a2eda374b7e673afe20309687a63f08.tar.xz | |
mm: memcontrol: remove BUG_ON in uncharge_list
When calling uncharge_list, if a page is transparent huge we don't need
to BUG_ON about non-transparent huge, since nobody should be able to see
the page at this stage and this page cannot be raced against with a THP
split.
This check became unneeded after 0a31bc97c80c ("mm: memcontrol: rewrite
uncharge API").
[mhocko@suse.com: changelog enhancements]
Link: http://lkml.kernel.org/r/1465369248-13865-1-git-send-email-roy.qing.li@gmail.com
Signed-off-by: Li RongQing <roy.qing.li@gmail.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Vladimir Davydov <vdavydov@virtuozzo.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 | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 1a1a3093a5c9e..36d6e324fadca 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -5580,7 +5580,6 @@ static void uncharge_list(struct list_head *page_list) if (PageTransHuge(page)) { nr_pages <<= compound_order(page); - VM_BUG_ON_PAGE(!PageTransHuge(page), page); nr_huge += nr_pages; } if (PageAnon(page)) |