linux-kernel - Re: [patch 0/2] x86, ptrace: support for branch trace store(BTS)

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Message-ID: <20071130105450.GE9941@elte.hu>
Date:	Fri, 30 Nov 2007 11:54:50 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	"Metzger, Markus T" <markus.t.metzger@...el.com>,
	linux-kernel@...r.kernel.org, hpa@...or.com, tglx@...utronix.de,
	ak@...e.de, suresh.b.siddha@...el.com,
	Michael Kerrisk <mtk-manpages@....net>
Subject: Re: [patch 0/2] x86, ptrace:  support for branch trace store(BTS)


* Andrew Morton <akpm@...ux-foundation.org> wrote:

> The patches were horridly wordwrapped.

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

 http://lkml.org/lkml/2007/11/29/93

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)

	Ingo
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