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| author | Shaohua Li <shli@fb.com> | 2017-05-03 14:52:26 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-03 15:52:08 -0700 |
| commit | d44d363f65780f2ac2ec672164555af54896d40d (patch) | |
| tree | bcac8f8737c3c9c2647afe02d904ca4f00c50f24 /mm/rmap.c | |
| parent | a128ca71fb29ed4444b80f38a0148b468826e19b (diff) | |
| download | linux-d44d363f65780f2ac2ec672164555af54896d40d.tar.gz linux-d44d363f65780f2ac2ec672164555af54896d40d.tar.bz2 linux-d44d363f65780f2ac2ec672164555af54896d40d.zip | |
mm: don't assume anonymous pages have SwapBacked flag
There are a few places the code assumes anonymous pages should have
SwapBacked flag set. MADV_FREE pages are anonymous pages but we are
going to add them to LRU_INACTIVE_FILE list and clear SwapBacked flag
for them. The assumption doesn't hold any more, so fix them.
Link: http://lkml.kernel.org/r/3945232c0df3dd6c4ef001976f35a95f18dcb407.1487965799.git.shli@fb.com
Signed-off-by: Shaohua Li <shli@fb.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/rmap.c')
| -rw-r--r-- | mm/rmap.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/mm/rmap.c b/mm/rmap.c index d7b6d780764b..b4084d09dbe8 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -1424,7 +1424,8 @@ static int try_to_unmap_one(struct page *page, struct vm_area_struct *vma, * Store the swap location in the pte. * See handle_pte_fault() ... */ - VM_BUG_ON_PAGE(!PageSwapCache(page), page); + VM_BUG_ON_PAGE(!PageSwapCache(page) && PageSwapBacked(page), + page); if (!PageDirty(page)) { /* It's a freeable page by MADV_FREE */ |