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Date: Wed, 25 Mar 2009 13:18:11 +0100
From: Ingo Molnar <mingo@elte.hu>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: linux-kernel@vger.kernel.org, Paul Mackerras <paulus@samba.org>,
       Mike Galbraith <efault@gmx.de>, Arjan van de Ven <arjan@infradead.org>,
       Wu Fengguang <fengguang.wu@intel.com>
Subject: Re: [PATCH 5/6] perf_counter: kerneltop: mmap_pages argument
Message-ID: <20090325121811.GC11571@elte.hu>
References: <20090325113021.781490788@chello.nl> <20090325113317.104545398@chello.nl>
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* Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:

> provide a knob to set the number of mmap data pages.

> +	" -m pages  --mmap_pages=<pages> # number of mmap data pages\n"

Btw., we really want this to be auto-tuning to a large degree. If 
the kernel observes missed events, it should create a 
PERF_EVENT_OVERFLOW==0x3 record, with the number of missed events - 
or something like that.

	Ingo
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