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| author |   Mel Gorman <mgorman@techsingularity.net> | 2023-05-15 12:33:42 +0100 |
|---|---|---|
| committer |   Andrew Morton <akpm@linux-foundation.org> | 2023-06-09 16:25:20 -0700 |
| commit | 9ecc5fc50a9c75b0af252913163a9f1ac4206b17 (patch) | |
| tree | 32ecaa4dd9fba57a2a34f57023d42e6244c1d88c /mm/fail_page_alloc.c | |
| parent | mm: compaction: ensure rescanning only happens on partially scanned pageblocks (diff) | |
| download | wireguard-linux-9ecc5fc50a9c75b0af252913163a9f1ac4206b17.tar.xz wireguard-linux-9ecc5fc50a9c75b0af252913163a9f1ac4206b17.zip | |
mm: compaction: only force pageblock scan completion when skip hints are obeyed
fast_find_migrateblock relies on skip hints to avoid rescanning a recently
selected pageblock but compact_zone() only forces the pageblock scan
completion to set the skip hint if in direct compaction. While this
prevents direct compaction repeatedly scanning a subset of blocks due to
fast_find_migrateblock(), it does not prevent proactive compaction, node
compaction and kcompactd encountering the same problem described in commit
cfccd2e63e7e ("mm, compaction: finish pageblocks on complete migration
failure").
Force the scan completion of a pageblock to set the skip hint if skip
hints are obeyed to prevent fast_find_migrateblock() repeatedly selecting
a subset of pageblocks.
Link: https://lkml.kernel.org/r/20230515113344.6869-3-mgorman@techsingularity.net
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Suggested-by: Vlastimil Babka <vbabka@suse.cz>
Tested-by: Raghavendra K T <raghavendra.kt@amd.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Chuyi Zhou <zhouchuyi@bytedance.com>
Cc: Jiri Slaby <jirislaby@kernel.org>
Cc: Maxim Levitsky <mlevitsk@redhat.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Pedro Falcato <pedro.falcato@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/fail_page_alloc.c')
0 files changed, 0 insertions, 0 deletions