diff options
author | Hugh Dickins <[email protected]> | 2021-07-11 20:10:49 -0700 |
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committer | Linus Torvalds <[email protected]> | 2021-07-12 11:30:56 -0700 |
commit | efdb6720b44b2f016d2a04b2c84e577e57ed84bd (patch) | |
tree | 8839da504223a882c72890dde4d56c9c44d5e6a4 /scripts/gdb/linux | |
parent | e73f0f0ee7541171d89f2e2491130c7771ba58d3 (diff) |
mm/rmap: fix munlocking Anon THP with mlocked ptes
Many thanks to Kirill for reminding that PageDoubleMap cannot be relied on
to warn of pte mappings in the Anon THP case; and a scan of subpages does
not seem appropriate here. Note how follow_trans_huge_pmd() does not even
mark an Anon THP as mlocked when compound_mapcount != 1: multiple mlocking
of Anon THP is avoided, so simply return from page_mlock() in this case.
Link: https://lore.kernel.org/lkml/[email protected]/
Fixes: d9770fcc1c0c ("mm/rmap: fix old bug: munlocking THP missed other mlocks")
Reported-by: Kirill A. Shutemov <[email protected]>
Signed-off-by: Hugh Dickins <[email protected]>
Acked-by: Kirill A. Shutemov <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Alistair Popple <[email protected]>
Cc: Jason Gunthorpe <[email protected]>
Cc: Ralph Campbell <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Yang Shi <[email protected]>
Cc: Shakeel Butt <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'scripts/gdb/linux')
0 files changed, 0 insertions, 0 deletions