linux-kernel - Re: [PATCH] perf-event/cgroup: explicitly init the early

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Message-ID: <CAHz2CGXzN3OhrjNnJhm_2j=h=y-Te_9yH=WQ4_Hzmco2-G895Q@mail.gmail.com>
Date:	Tue, 22 Apr 2014 14:42:16 +0800
From:	Jianyu Zhan <nasa4836@...il.com>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	a.p.zijlstra@...llo.nl, paulus@...ba.org, mingo@...hat.com,
	acme@...nel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] perf-event/cgroup: explicitly init the early_init field

On Tue, Apr 22, 2014 at 2:06 PM, Ingo Molnar <mingo@...nel.org> wrote:
> How can that field ever be nonzero?
>
> I.e. under what exact circumstances does this patch make sense?

Hi, Ingo,

For cpuset subsystem, this filed is nonzero; for other subsystems, this is zero.
Actually none of these subsystem will change this field,  I just
thought that  this is
a little subtle. as the comment in patches says, this is mainly for
document reason
to inform other maintainers that css_alloc implementation should be
taken care of ,
depending on this field is zero or not.

Thanks,
Jianyu Zhan
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