linux-kernel - Re: [PATCH] x86: add the debugfs interface for the sysprof tool

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Message-ID: <84144f020802230351o24b11282vbb1cecf518d91825@mail.gmail.com>
Date:	Sat, 23 Feb 2008 13:51:34 +0200
From:	"Pekka Enberg" <penberg@...helsinki.fi>
To:	"Andrew Morton" <akpm@...ux-foundation.org>
Cc:	"Arjan van de Ven" <arjan@...radead.org>,
	linux-kernel@...r.kernel.org, mingo@...e.hu, sandmann@...hat.com,
	tglx@...x.de, hpa@...or.com
Subject: Re: [PATCH] x86: add the debugfs interface for the sysprof tool

On Sat, Feb 23, 2008 at 10:11 AM, Andrew Morton
<akpm@...ux-foundation.org> wrote:
>  Seems a poor idea to me.  Sure, oprofile is "hard to set up", but not if
>  your distributor already did it for you.

Have you tried sysprof? It's really nice to setup and use compared to
oprofile when profiling user-space.

On Sat, Feb 23, 2008 at 10:11 AM, Andrew Morton
<akpm@...ux-foundation.org> wrote:
>  This code adds a new kernel->userspace interface which is not even
>  documented in code comments.  It appears to use a pollable debugfs file in
>  /proc somewhere, carrying an unspecified payload.

Hmm, it does include <linux/proc_fs.h> but seems to set up a regular
debugfs directory (usually mounted in /sys/debug) and not proc. Arjan?
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