linux-kernel - Re: [PATCH 1/5] x86: mm: Account for TLB flushes only when debugging

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Message-ID: <52CEFBFD.3080800@redhat.com>
Date:	Thu, 09 Jan 2014 14:43:57 -0500
From:	Rik van Riel <riel@...hat.com>
To:	Mel Gorman <mgorman@...e.de>, Alex Shi <alex.shi@...aro.org>,
	Ingo Molnar <mingo@...nel.org>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Fengguang Wu <fengguang.wu@...el.com>,
	H Peter Anvin <hpa@...or.com>, Linux-X86 <x86@...nel.org>,
	Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/5] x86: mm: Account for TLB flushes only when debugging

On 01/09/2014 09:34 AM, Mel Gorman wrote:
> Bisection between 3.11 and 3.12 fingered commit 9824cf97 (mm: vmstats:
> tlb flush counters).  The counters are undeniably useful but how often
> do we really need to debug TLB flush related issues? It does not justify
> taking the penalty everywhere so make it a debugging option.
>
> Signed-off-by: Mel Gorman <mgorman@...e.de>

Reviewed-by: Rik van Riel <riel@...hat.com>

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