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Date: Tue, 8 Sep 2009 13:53:00 +0200
From: Jens Axboe <jens.axboe@oracle.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: mingo@redhat.com, hpa@zytor.com, linux-kernel@vger.kernel.org,
       a.p.zijlstra@chello.nl, efault@gmx.de, tglx@linutronix.de,
       linux-tip-commits@vger.kernel.org
Subject: Re: [tip:sched/core] sched: Ensure that a child can't gain time
	over it's parent after fork()
Message-ID: <20090908115300.GW18599@kernel.dk>
References: <tip-b5d9d734a53e0204aab0089079cbde2a1285a38f@git.kernel.org> <20090908114927.GA1649@elte.hu>
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On Tue, Sep 08 2009, Ingo Molnar wrote:
> 
> * tip-bot for Mike Galbraith <efault@gmx.de> wrote:
> 
> > Commit-ID:  b5d9d734a53e0204aab0089079cbde2a1285a38f
> > Gitweb:     http://git.kernel.org/tip/b5d9d734a53e0204aab0089079cbde2a1285a38f
> > Author:     Mike Galbraith <efault@gmx.de>
> > AuthorDate: Tue, 8 Sep 2009 11:12:28 +0200
> > Committer:  Ingo Molnar <mingo@elte.hu>
> > CommitDate: Tue, 8 Sep 2009 13:15:34 +0200
> > 
> > sched: Ensure that a child can't gain time over it's parent after fork()
> 
> > This improves latencies of make -j<n> kernel build workloads.
> > 
> > Reported-by: Jens Axboe <jens.axboe@oracle.com>
> 
> Jens, mind trying this patch (or latest tip:master) with your make 
> -j4 workload, does it improve in any way?

Already booted it, makes no real difference... I'm trying with NO_HZ
disabled now to see if that changes the picture.

-- 
Jens Axboe