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| author | Thomas Gleixner <tglx@kernel.org> | 2026-03-10 21:29:09 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2026-03-11 12:01:07 +0100 |
| commit | 192d852129b1b7c4f0ddbab95d0de1efd5ee1405 (patch) | |
| tree | b683e4093b5c8b4366556c818a3fe95ed00015b7 /Documentation/console/git@git.tavy.me:linux.git | |
| parent | 7574ac6e49789ddee1b1be9b2afb42b4a1b4b1f4 (diff) | |
sched/mmcid: Avoid full tasklist walks
Chasing vfork()'ed tasks on a CID ownership mode switch requires a full
task list walk, which is obviously expensive on large systems.
Avoid that by keeping a list of tasks using a mm MMCID entity in mm::mm_cid
and walk this list instead. This removes the proven to be flaky counting
logic and avoids a full task list walk in the case of vfork()'ed tasks.
Fixes: fbd0e71dc370 ("sched/mmcid: Provide CID ownership mode fixup functions")
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/20260310202526.183824481@kernel.org
Diffstat (limited to 'Documentation/console/git@git.tavy.me:linux.git')
0 files changed, 0 insertions, 0 deletions