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| author | Liam R. Howlett <Liam.Howlett@oracle.com> | 2023-04-14 20:59:19 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-04-18 23:22:14 +0200 |
| commit | 58c5d0d6d522112577c7eeb71d382ea642ed7be4 (patch) | |
| tree | 18e74dcce2826b651093634757906c6b9b55e6a1 /mm/page_alloc.c | |
| parent | maple_tree: fix mas_empty_area() search (diff) | |
| download | linux-58c5d0d6d522112577c7eeb71d382ea642ed7be4.tar.xz linux-58c5d0d6d522112577c7eeb71d382ea642ed7be4.zip | |
mm/mmap: regression fix for unmapped_area{_topdown}
The maple tree limits the gap returned to a window that specifically fits
what was asked. This may not be optimal in the case of switching search
directions or a gap that does not satisfy the requested space for other
reasons. Fix the search by retrying the operation and limiting the search
window in the rare occasion that a conflict occurs.
Link: https://lkml.kernel.org/r/20230414185919.4175572-1-Liam.Howlett@oracle.com
Fixes: 3499a13168da ("mm/mmap: use maple tree for unmapped_area{_topdown}")
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Reported-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions