linux-kernel - Re: [PATCH] sched: fix env->src

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Message-ID: <CAKfTPtDprVAA0o6sTugYk8RiaUkGXUmSvd4RJbTEhNkKj7B-5A@mail.gmail.com>
Date:	Wed, 13 Feb 2013 13:08:58 +0100
From:	Vincent Guittot <vincent.guittot@...aro.org>
To:	Damien Wyart <damien.wyart@...il.com>
Cc:	linux-kernel@...r.kernel.org, linaro-dev@...ts.linaro.org,
	peterz@...radead.org, mingo@...nel.org
Subject: Re: [PATCH] sched: fix env->src_cpu for active migration

Damien,

Regarding your sched_domain config and especially the flags field, you
should not be impacted by my patch because
- need_active_balance is the only new place that use env->src_cpu in
the load_balance function
- and your machine will never test the condition: "env->src_cpu >
env->dst_cpu" in need_active_balance because  SD_ASYM_PACKING is not
set in your config

Have you tested the patch with others that could have modified the
load_balance function ?

Vincent

On 13 February 2013 10:21, Damien Wyart <damien.wyart@...il.com> wrote:
> Hi,
>
>> Thanks for the test and the feedback.
>> Could you send me the sched_domain configuration of your machine with
>> the kernel that boots on your machine ?
>> It's available in /proc/sys/kernel/sched_domain/cpu*/
>
> I attach to this mail the sched_domain info, the contents of
> /proc/cpuinfo and my kernel config.
>
> --
> Damien
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