Re: [PATCH] cpuset: fix race between hotplug work and later CPU offline

Peter Zijlstra writes: > On Thu, Oct 29, 2020 at 02:18:45PM -0400, Daniel Jordan wrote: >> rebuild_sched_domains_locked() prevented the race during the cgroup2 >> cpuset series up until the Fixes commit changed its check. Make the >> check more robust so that it can detect an offline CPU in any e

Re: [PATCH] cpuset: fix race between hotplug work and later CPU offline

On Thu, Oct 29, 2020 at 02:18:45PM -0400, Daniel Jordan wrote: > One of our machines keeled over trying to rebuild the scheduler domains. > Mainline produces the same splat: > > BUG: unable to handle page fault for address: 607f820054db > CPU: 2 PID: 149 Comm: kworker/1:1 Not tainted 5.10.