diff options
| author | Konstantin Khlebnikov <[email protected]> | 2016-04-28 16:18:32 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2016-04-28 19:34:04 -0700 |
| commit | 3486b85a29c1741db99d0c522211c82d2b7a56d0 (patch) | |
| tree | 4f4cae93c4107744a09445f880fc39a14f85ebec /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | 314e9b75b3f673a61ecbf0bba401830bc7dfe121 (diff) | |
mm/huge_memory: replace VM_NO_THP VM_BUG_ON with actual VMA check
Khugepaged detects own VMAs by checking vm_file and vm_ops but this way
it cannot distinguish private /dev/zero mappings from other special
mappings like /dev/hpet which has no vm_ops and popultes PTEs in mmap.
This fixes false-positive VM_BUG_ON and prevents installing THP where
they are not expected.
Link: http://lkml.kernel.org/r/CACT4Y+ZmuZMV5CjSFOeXviwQdABAgT7T+StKfTqan9YDtgEi5g@mail.gmail.com
Fixes: 78f11a255749 ("mm: thp: fix /dev/zero MAP_PRIVATE and vm_flags cleanups")
Signed-off-by: Konstantin Khlebnikov <[email protected]>
Reported-by: Dmitry Vyukov <[email protected]>
Acked-by: Vlastimil Babka <[email protected]>
Acked-by: Kirill A. Shutemov <[email protected]>
Cc: Dmitry Vyukov <[email protected]>
Cc: Andrea Arcangeli <[email protected]>
Cc: stable <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions