linux-kernel - Re: [sched_ext/for-6.11]: Issue with BPF Scheduler during CPU Hotplug

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Message-ID: <Zq1NksrG9blyN-KR@slm.duckdns.org>
Date: Fri, 2 Aug 2024 11:20:18 -1000
From: Tejun Heo <tj@...nel.org>
To: Aboorva Devarajan <aboorvad@...ux.ibm.com>
Cc: void@...ifault.com, linux-kernel@...r.kernel.org
Subject: Re: [sched_ext/for-6.11]: Issue with BPF Scheduler during CPU Hotplug

Hello, Aboorva.

On Fri, Jul 12, 2024 at 03:34:59PM +0530, Aboorva Devarajan wrote:
> Hi Tejun,
> 
> On Thu, 2024-07-11 at 17:30 +0530, Aboorva Devarajan wrote:
> 
> > > It could also be specific to ppc64 (e.g. there's something dependingon fork
> > > during CPU hotplug), or at least doesn't happen on x86. I'll probe it a bit
> > > more.
> > 
> > Sure, so far I haven't been able to reproduce the issue on x86, also I'm running
> > some tests for a longer duration to see if it can be recreated on x86 as well
> > inorder to rule out the possiblity of it being a ppc64 specific issue, it could
> > be that the issue occurs much rarer on x86 when compared to ppc64.
> > 
> 
> I have been able to recreate a similar issue on x86 as well, so this
> rules out the possibility of it being ppc64 specific.

Can you please applying the following patchset and see whether the problem
persists?

 http://lkml.kernel.org/r/20240802211850.1211737-1-tj@kernel.org

Thanks.

-- 
tejun