| Date | Tue, 22 Mar 2022 14:01:26 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH v2 2/6] perf/core: Introduce percpu perf_cgroup |
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On Tue, Mar 22, 2022 at 08:08:30PM +0800, Chengming Zhou wrote: > Although we don't have incosistency problem any more, we can > have other problem like: > > CPU1 CPU2 > (in context_switch) (attach running task) > prev->cgroups = cgrp2 > perf_cgroup_sched_switch(prev, next) > cgrp2 == cgrp2 is True >
Again, I'm not following, how can you attach to a running task from another CPU ?
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