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| author | Dennis Zhou | 2019-02-25 18:03:50 +0100 |
|---|---|---|
| committer | Dennis Zhou | 2019-03-13 20:25:31 +0100 |
| commit | 8744d859427c6198dce490619809754336954297 (patch) | |
| tree | 4d0a28eaac997430e93821ed4c6b82bb66b9a4f4 /mm/percpu-km.c | |
| parent | percpu: manage chunks based on contig_bits instead of free_bytes (diff) | |
| download | kernel-qcow2-linux-8744d859427c6198dce490619809754336954297.tar.gz kernel-qcow2-linux-8744d859427c6198dce490619809754336954297.tar.xz kernel-qcow2-linux-8744d859427c6198dce490619809754336954297.zip | |
percpu: relegate chunks unusable when failing small allocations
In certain cases, requestors of percpu memory may want specific
alignments. However, it is possible to end up in situations where the
contig_hint matches, but the alignment does not. This causes excess
scanning of chunks that will fail. To prevent this, if a small
allocation fails (< 32B), the chunk is moved to the empty list. Once an
allocation is freed from that chunk, it is placed back into rotation.
Signed-off-by: Dennis Zhou <dennis@kernel.org>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Diffstat (limited to 'mm/percpu-km.c')
0 files changed, 0 insertions, 0 deletions