linux-kernel - Re: [PATCH v2 2/6] cgroup/cpuset: Clarify the use of invalid partition root

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Message-ID: <YPH3sF56gK71CxXY@mtj.duckdns.org>
Date:   Fri, 16 Jul 2021 11:18:40 -1000
From:   Tejun Heo <tj@...nel.org>
To:     Waiman Long <llong@...hat.com>
Cc:     Zefan Li <lizefan.x@...edance.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Jonathan Corbet <corbet@....net>,
        Shuah Khan <shuah@...nel.org>, cgroups@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-kselftest@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Roman Gushchin <guro@...com>, Phil Auld <pauld@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>
Subject: Re: [PATCH v2 2/6] cgroup/cpuset: Clarify the use of invalid
 partition root

Hello,

On Fri, Jul 16, 2021 at 05:12:17PM -0400, Waiman Long wrote:
> Are you suggesting that we add a cpuset.cpus.events file that allows
> processes to be notified if an event (e.g. hotplug) that changes a partition
> root to invalid partition happens or when explicit change to a partition
> root fails? Will that be enough to satisfy your requirement?

Yeah, something like that or make the current state file generate events on
state transitions.

Thanks.

-- 
tejun