Messages in this thread | | | Date | Wed, 27 Jul 2022 12:05:41 -1000 | From | Tejun Heo <> | Subject | Re: [PATCH] sched/schedutil: Fix deadlock between cpuset and cpu hotplug when using schedutil |
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Hello,
On Thu, Jul 28, 2022 at 12:01:35AM +0200, Peter Zijlstra wrote: > On Tue, Jul 12, 2022 at 06:13:46AM -1000, Tejun Heo wrote: > > > But now we're failing user-initiated operations randomly. I have a hard time > > seeing that as an acceptable solution. > > There (sadly) is precedent for that; grep for "cpu_hotplug_disable".
Yeah, there's another one in cpu cgroup controller attach path. We should get better at not doing these. Low frequency arbitrary failures are really difficult to handle reliably downstream.
Thanks.
-- tejun
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