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mm: memcontrol: remove BUG_ON in uncharge_list

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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 0a31bc97c8 ("mm: memcontrol: rewrite
uncharge API").

[[email protected]: changelog enhancements]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Li RongQing <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Acked-by: Johannes Weiner <[email protected]>
Cc: Vladimir Davydov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Li RongQing 2016-07-26 15:26:53 -07:00 • committed by Linus Torvalds
commit 17408d785a
1 changed files with 0 additions and 1 deletions
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1
mm/memcontrol.c
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@ -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))