Re: [PATCH 1/2] cpuset: Fix cpuset_cpus_allowed() to not filter offline CPUs

[Waiman Long]

On 2/2/23 15:48, Tejun Heo wrote:
> On Thu, Feb 02, 2023 at 03:46:02PM -0500, Waiman Long wrote:
> > > > I will work on a patchset to do that as a counter offer.
> > > We will need a small and simple patch for /urgent, or I will need to
> > > revert all your patches -- your call.
> > >
> > > I also don't tihnk you fully appreciate the ramifications of
> > > task_cpu_possible_mask(), cpuset currently gets that quite wrong.
> > OK, I don't realize the urgency of that. If it is that urgent, I will have
> > no objection to get it in for now. We can improve it later on. So are you
> > planning to get it into the current 6.2 rc or 6.3?
> >
> > Tejun, are you OK with that as you are the cgroup maintainer?
> Yeah, gotta fix the regression but is there currently a solution which fixes
> the regression but doesn't further break other stuff?

I believe there is a better way to do that, but it will need more time 
to flex out. Since cpuset_cpus_allowed() is only used by 
kernel/sched/core.c, Peter will be responsible if it somehow breaks 
other stuff.

Thanks,
Longman