Re: [PATCH v3 09/14] cpuset: Don't use the cpu_possible_mask as a last resort for cgroup v1
From: Will Deacon <will@kernel.org>
Date: 2020-11-19 11:07:03
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On Thu, Nov 19, 2020 at 09:29:22AM +0000, Quentin Perret wrote:
On Friday 13 Nov 2020 at 09:37:14 (+0000), Will Deacon wrote:quoted
If the scheduler cannot find an allowed CPU for a task, cpuset_cpus_allowed_fallback() will widen the affinity to cpu_possible_mask if cgroup v1 is in use. In preparation for allowing architectures to provide their own fallback mask, just return early if we're not using cgroup v2 and allow select_fallback_rq() to figure out the mask by itself. Cc: Li Zefan <redacted> Cc: Tejun Heo <tj@kernel.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Will Deacon <will@kernel.org>That makes select_fallback_rq() slightly more expensive if you're using cgroup v1, but I don't expect that be really measurable in real-world workloads, so: Reviewed-by: Quentin Perret <redacted>
Cheers! Will _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel