linux-kernel - Re: [PATCH v3 08/10] sched/psi: consolidate cgroup

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Message-ID: <YwX7QvIpmPpxEHgI@cmpxchg.org>
Date:   Wed, 24 Aug 2022 06:19:46 -0400
From:   Johannes Weiner <hannes@...xchg.org>
To:     Chengming Zhou <zhouchengming@...edance.com>
Cc:     tj@...nel.org, mkoutny@...e.com, surenb@...gle.com,
        gregkh@...uxfoundation.org, corbet@....net, mingo@...hat.com,
        peterz@...radead.org, songmuchun@...edance.com,
        cgroups@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 08/10] sched/psi: consolidate cgroup_psi()

On Wed, Aug 24, 2022 at 04:18:27PM +0800, Chengming Zhou wrote:
> cgroup_psi() can't return psi_group for root cgroup, so we have many
> open code "psi = cgroup_ino(cgrp) == 1 ? &psi_system : cgrp->psi".
> 
> This patch move cgroup_psi() definition to <linux/psi.h>, in which
> we can return psi_system for root cgroup, so can handle all cgroups.
> 
> Signed-off-by: Chengming Zhou <zhouchengming@...edance.com>

Acked-by: Johannes Weiner <hannes@...xchg.org>