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| author | Hugh Dickins <hughd@google.com> | 2014-03-18 17:38:38 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-03-19 16:21:49 -0700 |
| commit | 887843961c4b4681ee993c36d4997bf4b4aa8253 (patch) | |
| tree | edb4f2e829dbabeab258033248a5f29adaf60eb6 /fs/binfmt_em86.c | |
| parent | 7c1cfacca2083db519317f49f31e143d97fd554a (diff) | |
| download | linux-887843961c4b4681ee993c36d4997bf4b4aa8253.tar.gz linux-887843961c4b4681ee993c36d4997bf4b4aa8253.tar.bz2 linux-887843961c4b4681ee993c36d4997bf4b4aa8253.zip | |
mm: fix bad rss-counter if remap_file_pages raced migration
Fix some "Bad rss-counter state" reports on exit, arising from the
interaction between page migration and remap_file_pages(): zap_pte()
must count a migration entry when zapping it.
And yes, it is possible (though very unusual) to find an anon page or
swap entry in a VM_SHARED nonlinear mapping: coming from that horrid
get_user_pages(write, force) case which COWs even in a shared mapping.
Signed-off-by: Hugh Dickins <hughd@google.com>
Tested-by: Sasha Levin sasha.levin@oracle.com>
Tested-by: Dave Jones davej@redhat.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/binfmt_em86.c')
0 files changed, 0 insertions, 0 deletions