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Message-ID: <1470043872.5903.5.camel@gmail.com>
Subject: Re: [PATCH 4/4] sched,fair: Fix PELT integrity for new tasks
From: Mike Galbraith <umgwanakikbuti@gmail.com>
To: Wanpeng Li <kernellwp@gmail.com>, Peter Zijlstra <peterz@infradead.org>
Cc: Yuyang Du <yuyang.du@intel.com>, Ingo Molnar <mingo@kernel.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Benjamin Segall <bsegall@google.com>, Paul Turner <pjt@google.com>,
        Morten Rasmussen <morten.rasmussen@arm.com>,
        Dietmar Eggemann <dietmar.eggemann@arm.com>,
        Matt Fleming <matt@codeblueprint.co.uk>,
        Vincent Guittot <vincent.guittot@linaro.org>
Date: Mon, 01 Aug 2016 11:31:12 +0200
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On Mon, 2016-08-01 at 15:30 +0800, Wanpeng Li wrote:

> What's the meaning of "the task is hashed before we call
> wake_up_new_task()"?

See fork.c::copy_process()

        /*
         * Make it visible to the rest of the system, but dont wake it up yet.
         * Need tasklist lock for parent etc handling!
         */
        write_lock_irq(&tasklist_lock);
        ....