linux-kernel - Re: [PATCH] perf: Better fit max unprivileged mlock pages for tools needs

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Message-ID: <1301049130.2250.185.camel@laptop>
Date:	Fri, 25 Mar 2011 11:32:10 +0100
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Han Pingtian <phan@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Ingo Molnar <mingo@...e.hu>,
	Stephane Eranian <eranian@...gle.com>,
	Stable <stable@...nel.org>
Subject: Re: [PATCH] perf: Better fit max unprivileged mlock pages for
 tools needs

On Wed, 2011-03-23 at 19:29 +0100, Frederic Weisbecker wrote:

> -int sysctl_perf_event_mlock __read_mostly = 512; /* 'free' kb per user */
> +/* Minimum for 128 pages + 1 for the user control page */
> +int sysctl_perf_event_mlock __read_mostly = 516; /* 'free' kb per user */

This assumes PAGE_SIZE = 4k..

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