linux-kernel - Re: [patch] x86, bts: use atomic memory allocation

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Message-ID: <20090319161141.GA12144@elte.hu>
Date:	Thu, 19 Mar 2009 17:11:41 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Markus Metzger <markus.t.metzger@...el.com>
Cc:	linux-kernel@...r.kernel.org, tglx@...utronix.de, hpa@...or.com,
	markus.t.metzger@...il.com, roland@...hat.com,
	eranian@...glemail.com, oleg@...hat.com, juan.villacis@...el.com,
	ak@...ux.jf.intel.com
Subject: Re: [patch] x86, bts: use atomic memory allocation


* Markus Metzger <markus.t.metzger@...el.com> wrote:

> Ds_request_bts() needs to allocate memory. It uses GFP_KERNEL.
> 
> Hw-branch-tracer calls ds_request_bts() within on_each_cpu().
> 
> Use atomic memory allocation to allow it to be used in that context.

the hw-branch-tracer still crashes during bootup. Have you tried the 
config i sent to you, and have you tried to reproduce it? I've 
attached another config that crashes.

	Ingo

View attachment "config" of type "text/plain" (62080 bytes)

View attachment "crash.log" of type "text/plain" (59845 bytes)