Messages in this thread | | | Date | Wed, 13 Oct 2021 16:39:01 +0200 | From | Michal Koutný <> | Subject | Re: [PATCH] sched/fair: Use rq->lock when checking cfs_rq list presence |
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On Mon, Oct 11, 2021 at 08:12:08PM +0100, Odin Ugedal <odin@uged.al> wrote: > To be 100% clear, this can only happen when a control group is > throttled while it has load > (cfs_rq_is_decayed(cfs_rq) is false); and then its unthrottling race > with its deletion? > Is that a correct understanding Michal?
Yes, that's my working hypothesis but Vincent found a loophole in the proposed fix under this assumption.
> Do you agree that that will also solve the problem Michal, > or am I missing something obvious here?
It's not easy for me to verify this with a reproducer and as suggested by your discomfort, let's dismiss this idea for the time being.
Michal
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