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From: Wanpeng Li <kernellwp@gmail.com>
Date: Mon, 1 Aug 2016 17:56:14 +0800
Message-ID: <CANRm+CyCPpV2qbydP76fNWyRxUL-eZvr=i=oRUL1pb74ymPB0Q@mail.gmail.com>
Subject: Re: [PATCH 4/4] sched,fair: Fix PELT integrity for new tasks
To: Mike Galbraith <umgwanakikbuti@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>, 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>
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2016-08-01 17:31 GMT+08:00 Mike Galbraith <umgwanakikbuti@gmail.com>:
> 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);
>         ....

Thanks Mike, so here "is hashed" means that add to list instead of real hashing.

Regards,
Wanpeng Li