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

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Date:	Tue, 5 Dec 2006 07:38:54 -0800
From:	"Chen, Kenneth W" <kenneth.w.chen@...el.com>
To:	"'Ingo Molnar'" <mingo@...e.hu>
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

Ingo Molnar wrote on Tuesday, December 05, 2006 7:32 AM
> * 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.

Really?  sched-decrease-number-of-load-balances.patch has not yet hit the
mainline and I think it's in -mm for only a couple of weeks.  I'm trying
to back out the change after brief reviewing the patch.

- Ken
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