linux-kernel - Re: [PATCH v3] sched/isolation: add a workqueue parameter onto isolcpus to constrain unbound CPUs

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Message-ID: <ZJn7Fm4OI1ySPHZg@slm.duckdns.org>
Date:   Mon, 26 Jun 2023 10:54:46 -1000
From:   Tejun Heo <tj@...nel.org>
To:     mingo@...hat.com, peterz@...radead.org, juri.lelli@...hat.com,
        vincent.guittot@...aro.org, linux-kernel@...r.kernel.org,
        dietmar.eggemann@....com, rostedt@...dmis.org, bsegall@...gle.com,
        mgorman@...e.de, bristot@...hat.com, vschneid@...hat.com,
        fuyuanli@...iglobal.com, zwp10758@...il.com, zyhtheonly@...il.com,
        zyhtheonly@...h.net
Subject: Re: [PATCH v3] sched/isolation: add a workqueue parameter onto
 isolcpus to constrain unbound CPUs

On Thu, Jun 22, 2023 at 11:22:17AM +0800, tiozhang wrote:
> Motivation of doing this is to better improve boot times for devices when
> we want to prevent our workqueue works from running on some specific CPUs,
> i,e, some CPUs are busy with interrupts.
> 
> Also remove HK_FLAG_WQ from nohz_full to prevent nohz_full overriding
> workqueue's cpu config.
> 
> Suggested-by: Tejun Heo <tj@...nel.org>
> Signed-off-by: tiozhang <tiozhang@...iglobal.com>

Let's just do the workqueue specific parameter. I'll apply the other one to
the workqueue branch after the merge window.

Thanks.

-- 
tejun