linux-kernel - Re: [-mm patch] sched remove lb

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Message-ID: <20061205153224.GA3204@elte.hu>
Date:	Tue, 5 Dec 2006 16:32:24 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	"Chen, Kenneth W" <kenneth.w.chen@...el.com>
Cc:	"Siddha, Suresh B" <suresh.b.siddha@...el.com>,
	'Andrew Morton' <akpm@...l.org>,
	'Christoph Lameter' <clameter@....com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [-mm patch] sched remove lb_stopbalance counter


* Chen, Kenneth W <kenneth.w.chen@...el.com> wrote:

> in -mm tree: I would like to revert the change on adding 
> lb_stopbalance counter.  This count can be calculated by: lb_balanced 
> - lb_nobusyg - lb_nobusyq.  There is no need to create gazillion 
> counters while we can derive the value.  I'm more of against changing 
> sched-stat format unless it is absolutely necessary as all user land 
> tool parsing /proc/schedstat needs to be updated and it's a real pain 
> trying to keep multiple versions of it.
> 
> Signed-off-by: Ken Chen <kenneth.w.chen@...el.com>

Acked-by: Ingo Molnar <mingo@...e.hu>

but, please:

> -#define SCHEDSTAT_VERSION 13
> +#define SCHEDSTAT_VERSION 12

change this to 14 instead. Versions should only go upwards, even if we 
revert to an earlier output format.

	Ingo
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