linux-kernel - Re: [RFC][PATCH 6/8] mm: handle_speculative

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Message-ID: <87my0omo3n.fsf@basil.nowhere.org>
Date:	Fri, 08 Jan 2010 19:46:20 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Christoph Lameter <cl@...ux-foundation.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Minchan Kim <minchan.kim@...il.com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"hugh.dickins" <hugh.dickins@...cali.co.uk>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [RFC][PATCH 6/8] mm: handle_speculative_fault()

Christoph Lameter <cl@...ux-foundation.org> writes:

> Can we at least consider a typical standard business server, dual quad
> core hyperthreaded with 16 "cpus"? Cacheline contention will increase
> significantly there.

This year's standard server will be more like 24-64 "cpus"

Cheating with locks usually doesn't work anymore at these sizes.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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