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| author |   Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> | 2018-05-11 16:02:00 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2018-05-11 17:28:45 -0700 |
| commit | 013567be19761e2d14fc2a2676fe7686ac54c9ac (patch) | |
| tree | 828f9278240369148da5b784eb032d3b5b61a1cb /mm/migrate.c | |
| parent | proc/kcore: don't bounds check against address 0 (diff) | |
| download | linux-dev-013567be19761e2d14fc2a2676fe7686ac54c9ac.tar.xz linux-dev-013567be19761e2d14fc2a2676fe7686ac54c9ac.zip | |
mm: migrate: fix double call of radix_tree_replace_slot()
radix_tree_replace_slot() is called twice for head page, it's obviously
a bug. Let's fix it.
Link: http://lkml.kernel.org/r/20180423072101.GA12157@hori1.linux.bs1.fc.nec.co.jp
Fixes: e71769ae5260 ("mm: enable thp migration for shmem thp")
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Reported-by: Matthew Wilcox <willy@infradead.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: Zi Yan <zi.yan@sent.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/migrate.c')
| -rw-r--r-- | mm/migrate.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/mm/migrate.c b/mm/migrate.c index 568433023831..8c0af0f7cab1 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -528,14 +528,12 @@ int migrate_page_move_mapping(struct address_space *mapping, int i; int index = page_index(page); - for (i = 0; i < HPAGE_PMD_NR; i++) { + for (i = 1; i < HPAGE_PMD_NR; i++) { pslot = radix_tree_lookup_slot(&mapping->i_pages, index + i); radix_tree_replace_slot(&mapping->i_pages, pslot, newpage + i); } - } else { - radix_tree_replace_slot(&mapping->i_pages, pslot, newpage); } /* |