linux-kernel - Re: [GIT PATCH] x86,percpu: fix pageattr handling with remap allocator

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Message-ID: <4A14B2D2.1090008@novell.com>
Date:	Thu, 21 May 2009 10:48:02 +0900
From:	Tejun Heo <teheo@...ell.com>
To:	suresh.b.siddha@...el.com
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	"JBeulich@...ell.com" <JBeulich@...ell.com>,
	"andi@...stfloor.org" <andi@...stfloor.org>,
	"mingo@...e.hu" <mingo@...e.hu>,
	"linux-kernel-owner@...r.kernel.org" 
	<linux-kernel-owner@...r.kernel.org>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [GIT PATCH] x86,percpu: fix pageattr handling with remap allocator

Tejun Heo wrote:
> On NUMA, both remap and 4k add some level of TLB pressure.  remap will
> waste one more PMD TLB entry (dup) while 4k adds a bunch of 4k ones
> (non-dup but what used to be accessed by PMD TLB is now accessed with
> PTE TLB).

Correction: 4k TLBs are dups too.

Thanks.

-- 
tejun
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