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authorYu Zhao <yuzhao@google.com>2021-02-24 23:08:28 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2021-02-25 00:38:33 +0300
commit875601796267214f286d3581fe74f2805d060fe8 (patch)
treee84a955100ef161a8e854b213ac24b79984e412b /mm/vmscan.c
parent46ae6b2cc2a47904a368d238425531ea91f3a2a5 (diff)
downloadlinux-875601796267214f286d3581fe74f2805d060fe8.tar.xz
mm: add __clear_page_lru_flags() to replace page_off_lru()
Similar to page_off_lru(), the new function does non-atomic clearing of PageLRU() in addition to PageActive() and PageUnevictable(), on a page that has no references left. If PageActive() and PageUnevictable() are both set, refuse to clear either and leave them to bad_page(). This is a behavior change that is meant to help debug. Link: https://lore.kernel.org/linux-mm/20201207220949.830352-7-yuzhao@google.com/ Link: https://lkml.kernel.org/r/20210122220600.906146-7-yuzhao@google.com Signed-off-by: Yu Zhao <yuzhao@google.com> Cc: Alex Shi <alex.shi@linux.alibaba.com> Cc: Hugh Dickins <hughd@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Matthew Wilcox <willy@infradead.org> Cc: Michal Hocko <mhocko@kernel.org> Cc: Roman Gushchin <guro@fb.com> Cc: Vladimir Davydov <vdavydov.dev@gmail.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/vmscan.c')
-rw-r--r--mm/vmscan.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 7c65d47e6612..452dd3818aa3 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1849,8 +1849,7 @@ static unsigned noinline_for_stack move_pages_to_lru(struct lruvec *lruvec,
SetPageLRU(page);
if (unlikely(put_page_testzero(page))) {
- __ClearPageLRU(page);
- __ClearPageActive(page);
+ __clear_page_lru_flags(page);
if (unlikely(PageCompound(page))) {
spin_unlock_irq(&lruvec->lru_lock);