RE: [patch 0/2] x86, ptrace: support for branch trace store(BTS)

From: "Metzger, Markus T" <markus.t.metzger@intel.com>
To: "Ingo Molnar" <mingo@elte.hu>,
	"Andrew Morton" <akpm@linux-foundation.org>
Cc: <linux-kernel@vger.kernel.org>, <hpa@zytor.com>,
	<tglx@linutronix.de>, <ak@suse.de>,
	"Siddha, Suresh B" <suresh.b.siddha@intel.com>,
	"Michael Kerrisk" <mtk-manpages@gmx.net>,
	"Metzger, Markus T" <markus.t.metzger@intel.com>,
	<markus.t.metzger@gmail.com>
Subject: RE: [patch 0/2] x86, ptrace:  support for branch trace store(BTS)
Date: Fri, 30 Nov 2007 15:48:21 -0000	[thread overview]
Message-ID: <029E5BE7F699594398CA44E3DDF5544401052377@swsmsx413.ger.corp.intel.com> (raw)
In-Reply-To: <20071130105450.GE9941@elte.hu>

>yep, i already tried to check how well it integrates to x86.git:

I ported it to scm/linux/kernel/git/x86/linux-2.6-x86.git mm.
I will send out the patch and then look at the below discussion.

>the code does not seem to be layered correctly: i'd suggest to 
>read the 
>discussion between Roland McGrath and Alan Stern on lkml, about kwatch 
>-> hw_breakpoint, to see how a more general debugging framework 
>can/should be built. These things shouldnt be limited to user-space 
>alone, the kernel could probably use hardware tracing even more than 
>user-space could. (because it's a much harder to debug environment)

regards,
markus.
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