linux-kernel - [RFC Patch 0/4] Enhance perf-events to profile memory accesses using hw-breakpoints

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Message-ID: <20091026211637.GA15529@in.ibm.com>
Date:	Tue, 27 Oct 2009 02:46:37 +0530
From:	"K.Prasad" <prasad@...ux.vnet.ibm.com>
To:	Ingo Molnar <mingo@...e.hu>,
	Frederic Weisbecker <fweisbec@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Alan Stern <stern@...land.harvard.edu>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [RFC Patch 0/4] Enhance perf-events to profile memory accesses
	using hw-breakpoints

Hi All,
	Please review a set of patches that enhance the
perf-events infrastructure to use hw-breakpoints layer to monitor accesses over
kernel-space addresses/symbols, apart from bringing a few related enhancements
to the hw-breakpoint layer.

These patches are still under development and is based off -tip tree
(commit 77a088cd30a7bd2c700bf57544732fff6971305e) and are known to have a few
issues (listed in patch 3/3).

Patch 1/4: Allow per-cpu kernel-space Hardware Breakpoint requests
(originally posted here http://lkml.org/lkml/2009/8/17/172)
Patch 2/4: Allow breakpoints to be enabled/disabled on the fly (without yielding
them to other contenders).
Patch 3/4: Bugfix HW-BKPT: Fix traceback seen when resuming after suspend-to-ram
Patch 4/4: Enhance perf-events to profile memory accesses over kernel symbols

Comments on the same will be appreciated!

Thanks,
K.Prasad

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