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| author | Yang, Philip <Philip.Yang@amd.com> | 2019-08-15 23:52:56 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2019-08-23 16:22:20 +0300 |
| commit | e3fe8e555dd05cf74168d18555c44320ed50a0e1 (patch) | |
| tree | 93a7d05212b8be9eabffd7ecb0b4358f061c2293 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | c96245148c1ec7af086da322481bf4119d1141d3 (diff) | |
| download | linux-e3fe8e555dd05cf74168d18555c44320ed50a0e1.tar.xz | |
mm/hmm: fix hmm_range_fault()'s handling of swapped out pages
hmm_range_fault() may return NULL pages because some of the pfns are equal
to HMM_PFN_NONE. This happens randomly under memory pressure. The reason
is during the swapped out page pte path, hmm_vma_handle_pte() doesn't
update the fault variable from cpu_flags, so it failed to call
hmm_vam_do_fault() to swap the page in.
The fix is to call hmm_pte_need_fault() to update fault variable.
Fixes: 74eee180b935 ("mm/hmm/mirror: device page fault handler")
Link: https://lore.kernel.org/r/20190815205227.7949-1-Philip.Yang@amd.com
Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: "Jérôme Glisse" <jglisse@redhat.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions