linux-kernel - Re: [patch 3/8] mm, mempolicy: remove per-process flag

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Message-ID: <alpine.DEB.2.02.1312051550390.7717@chino.kir.corp.google.com>
Date:	Thu, 5 Dec 2013 15:53:35 -0800 (PST)
From:	David Rientjes <rientjes@...gle.com>
To:	Christoph Lameter <cl@...ux.com>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Michal Hocko <mhocko@...e.cz>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Mel Gorman <mgorman@...e.de>, Rik van Riel <riel@...hat.com>,
	Pekka Enberg <penberg@...nel.org>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	cgroups@...r.kernel.org
Subject: Re: [patch 3/8] mm, mempolicy: remove per-process flag

On Thu, 5 Dec 2013, Christoph Lameter wrote:

> Specjbb? What does Java have to do with this?
> Can you run the synthetic in kernel slab benchmark.
> 
> Like this one https://lkml.org/lkml/2009/10/13/459
> 

We actually carry that in our production kernel and have updated it to 
build on 3.11, I'll run it and netperf TCP_RR as well, thanks.

> However, SLAB is still the allocator in use for RHEL which puts some
> importance on still supporting SLAB.
> 

Google also uses it exclusively so I'm definitely not saying that since 
it's not default that we can ignore it.  I haven't seen any performance 
regression in removing it, but I'll post the numbers on the slab benchmark 
and netperf TCP_RR when I have them.
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