linux-kernel - Re: [URGENT rfc patch 0/3] tsc clocksource bug fix

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Message-ID: <51D61D97.8060904@intel.com>
Date:	Fri, 05 Jul 2013 09:12:55 +0800
From:	Alex Shi <alex.shi@...el.com>
To:	Thomas Gleixner <tglx@...utronix.de>
CC:	Davidlohr Bueso <davidlohr.bueso@...com>, hpa@...ux.intel.com,
	tim.c.chen@...ux.intel.com, linux-kernel@...r.kernel.org,
	andi.kleen@...el.com, a.p.zijlstra@...llo.nl, mingo@...e.hu
Subject: Re: [URGENT rfc patch 0/3] tsc clocksource bug fix

On 07/05/2013 04:27 AM, Thomas Gleixner wrote:
>>>> We find some benchmarks drop a lot on tip/sched/core on many Intel boxes,
> And that branch does NOT have that commit included. So how can you see
> a regression on a branch caused by a commit NOT included into that
> branch?
> 
> The offending commit is in tip timers/core and not in tip
> sched/core. What I'm wanted to say is, that we need a proper
> description of problems and not some random association.
> 
> It tricked you to assume, that I'm not able to figure it out myself :)
> 
> See? These things are complex and subtle, so we need precise
> descriptions and not some sloppy semi correct data.
> 
> I'm well aware of the issue and with Peters help I got a reasonable
> explanation for it. A proper fix is about to be sent out.
> 

Ingo had merged your branch into sched/core. :)

commit f9bed7021710a3e45c331f7d7781de914cc1b939
Merge: 7e76057 67dd331
Author: Ingo Molnar <mingo@...nel.org>
Date:   Wed May 29 11:21:59 2013 +0200

    Merge branch 'timers/urgent'

...

commit 7d194f78bde64ec813c1ed8291181bdd61515e78
Merge: 0298bf7 1eaff67
Author: Ingo Molnar <mingo@...nel.org>
Date:   Tue May 28 09:53:41 2013 +0200

    Merge branch 'timers/core'

commit 0298bf70644d7334bec16ae47f3aa58f4f883b59
Merge: cc662fa 2938d27
Author: Ingo Molnar <mingo@...nel.org>
Date:   Tue May 28 09:49:51 2013 +0200

    Merge branch 'timers/urgent'

-- 
Thanks
    Alex
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