linux-kernel - Re: [PATCH v2] sched/core: Don't mix isolcpus and housekeeping CPUs

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Message-Id: <20181025182317.GE18466@linux.vnet.ibm.com>
Date:   Thu, 25 Oct 2018 23:53:17 +0530
From:   Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Rik van Riel <riel@...riel.com>,
        Yi Wang <wang.yi59@....com.cn>, zhong.weidong@....com.cn,
        Yi Liu <liu.yi24@....com.cn>,
        Frederic Weisbecker <frederic@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH v2] sched/core: Don't mix isolcpus and housekeeping CPUs

> 
> You can create multiple partitions with cpusets but still have an
> unbound task in the root cgroup. That would suffer the exact same
> problems.
> 

I probably don't understand this. Even if the child cgroups has
cpu_exclusive or sched_load_balance reset, the tasks in root cgroup has
access to all cpus in system. Right?

-- 
Thanks and Regards
Srikar Dronamraju