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| author | Qi Zheng <zhengqi.arch@bytedance.com> | 2024-09-26 14:46:20 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-11-05 16:56:27 -0800 |
| commit | 6dfd0d2cb3691040979ddbd6c758956694a3185d (patch) | |
| tree | 86a3d82508709534d9a87023bd02b83e8fcb8f11 /tools/perf/scripts/python/bin | |
| parent | d9c1ddf37b4c287597a4578e70d19ed68d536be8 (diff) | |
mm: khugepaged: collapse_pte_mapped_thp() use pte_offset_map_rw_nolock()
In collapse_pte_mapped_thp(), we may modify the pte and pmd entry after
acquiring the ptl, so convert it to using pte_offset_map_rw_nolock(). At
this time, the pte_same() check is not performed after the PTL held. So
we should get pgt_pmd and do pmd_same() check after the ptl held.
Link: https://lkml.kernel.org/r/055e42db68da00ac8ecab94bd2633c7cd965eb1c.1727332572.git.zhengqi.arch@bytedance.com
Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
Reviewed-by: Muchun Song <muchun.song@linux.dev>
Cc: David Hildenbrand <david@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Mike Rapoport (Microsoft) <rppt@kernel.org>
Cc: Peter Xu <peterx@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'tools/perf/scripts/python/bin')
0 files changed, 0 insertions, 0 deletions