linux-kernel - Re: [PATCH 2/2] s390/topology: add drawer scheduling domain level

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Message-ID: <20160613113301.GX30909@twins.programming.kicks-ass.net>
Date:	Mon, 13 Jun 2016 13:33:01 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Heiko Carstens <heiko.carstens@...ibm.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] s390/topology: add drawer scheduling domain level

On Mon, Jun 13, 2016 at 01:25:53PM +0200, Heiko Carstens wrote:
> On Mon, Jun 13, 2016 at 01:06:21PM +0200, Peter Zijlstra wrote:
> > On Wed, Jun 08, 2016 at 11:09:16AM +0200, Heiko Carstens wrote:
> > > The z13 machine added a fourth level to the cpu topology
> > > information. The new top level is called drawer.
> > > 
> > > A drawer contains two books, which used to be the top level.
> > > 
> > > Adding this additional scheduling domain did show performance
> > > improvements for some workloads of up to 8%, while there don't
> > > seem to be any workloads impacted in a negative way.
> > 
> > Right; so no objection.
> > 
> > Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>
> 
> May I add your ACK also to the sysfs patch?

Not really my area, nor something I've ever looked hard at, but the
patch seems to have the right shape, so sure ;-)