linux-kernel - Re: [PATCH] perf_events: improve DS/BTS/PEBS buffer allocation

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Message-ID: <1284399361.2275.388.camel@laptop>
Date:	Mon, 13 Sep 2010 19:36:01 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	linux-kernel@...r.kernel.org, mingo@...e.hu, paulus@...ba.org,
	davem@...emloft.net, perfmon2-devel@...ts.sf.net,
	eranian@...il.com, robert.richter@....com,
	"markus.t.metzger" <markus.t.metzger@...el.com>
Subject: Re: [PATCH] perf_events: improve DS/BTS/PEBS buffer allocation

On Mon, 2010-09-13 at 19:24 +0200, Stephane Eranian wrote:
> Based on this comment, I assume that the only reason the allocation
> of the sampling buffer in perf_buffer_alloc() is immune to this is because
> you are allocating each page individually (order 0). Right? 

Right, and I software stitch the bits together.
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