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From: Tejun Heo <tj@kernel.org>
To: Andrea Righi <arighi@nvidia.com>
Cc: David Vernet <void@manifault.com>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH sched_ext/for-6.13] sched_ext: Do not enable LLC/NUMA optimizations when domains overlap
Date: Tue, 5 Nov 2024 15:15:59 -1000	[thread overview]
Message-ID: <ZyrDTzVSQtNBcZ-x@slm.duckdns.org> (raw)
In-Reply-To: <ZyrBcDvFVtSFPhvG@gpd3>

Hello, Andrea.

On Wed, Nov 06, 2024 at 02:08:00AM +0100, Andrea Righi wrote:
...
> I think this is only possible in a virtualized environment, in this case
> LLC should be disabled and NUMA enabled. Maybe it's worth checking also
> for the case where LLC > NUMA...

I think the current code is okay. It just needs a short comment explaining
why it's so. A cleaner alternative may be walking the llc sd's and verify
whether any two llcs share the same node sd as an ancestor.

Thanks.

-- 
tejun

  reply	other threads:[~2024-11-06  1:16 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-10-31  7:34 [PATCH sched_ext/for-6.13] sched_ext: Do not enable LLC/NUMA optimizations when domains overlap Andrea Righi
2024-11-05 23:32 ` Tejun Heo
2024-11-06  0:29   ` Andrea Righi
2024-11-06  0:33     ` Tejun Heo
2024-11-06  1:08       ` Andrea Righi
2024-11-06  1:15         ` Tejun Heo [this message]
2024-11-06  1:25           ` Tejun Heo

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