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From: "Frank Ch. Eigler" <fche@redhat.com>
To: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Roland McGrath <roland@redhat.com>,
	"Frank Ch. Eigler" <fche@redhat.com>,
	Denys Vlasenko <vda.linux@googlemail.com>,
	systemtap@sources.redhat.com,
	Christoph Hellwig <hch@infradead.org>,
	Rusty Russell <rusty@rustcorp.com.au>,
	akpm@linux-foundation.org, linux-kernel@vger.kernel.org
Subject: Re: [patch 1/4] Linux Kernel Markers - Architecture Independent Code
Date: Fri, 26 Oct 2007 10:28:10 -0400	[thread overview]
Message-ID: <20071026142810.GA14814@redhat.com> (raw)
In-Reply-To: <20071025191722.GA6114@Krystal>

Hi -

On Thu, Oct 25, 2007 at 03:17:22PM -0400, Mathieu Desnoyers wrote:
> [...]
> Since gcc is required to build the systemtap probes on the development
> marchine, I don't see why it would be much harder to also require prople
> to install drawf ? Or maybe the "crash" tool ?

The crash tool requires the dwarf data to work.  The dwarf data for an
entire kernel (including all the modules) is on the order of hundreds
of megabytes.  The symbol & marker list would be one thousandth the
size.  You can see the deployment attractiveness of the latter.

> I guess you must already need to extract the symbols for your kprobes.
> Do you use kallsyms for this? 

Nope.  /proc/kallsyms is a another run-time-only source of data, and
so is not applicable for off-line (ahead-of-time) mapping.

> I would rather prefer not to implement superfluous built-time data
> extraction in the kernel build system just to make userspace
> simpler. [...]

It is not superfluous, as it would solve a real distribution problem.


- FChE

  reply	other threads:[~2007-10-26 14:30 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-09-18 21:13 [patch 0/4] Linux Kernel Markers for 2.6.23-rc6-mm1 Mathieu Desnoyers
2007-09-18 21:13 ` [patch 1/4] Linux Kernel Markers - Architecture Independent Code Mathieu Desnoyers
2007-09-19 11:37   ` Mathieu Desnoyers
2007-09-19 13:53     ` Frank Ch. Eigler
2007-09-19 20:32       ` Denys Vlasenko
2007-09-21 12:58         ` Mathieu Desnoyers
2007-09-21 13:07           ` Christoph Hellwig
2007-09-21 13:30           ` Frank Ch. Eigler
2007-09-21 13:38             ` Mathieu Desnoyers
2007-10-15 19:41               ` Frank Ch. Eigler
2007-10-15 23:12                 ` Mathieu Desnoyers
2007-10-15 23:50                   ` Roland McGrath
2007-10-25 19:17                     ` Mathieu Desnoyers
2007-10-26 14:28                       ` Frank Ch. Eigler [this message]
2007-11-01  1:06                         ` [PATCH] markers: modpost Roland McGrath
2007-11-01  2:46                           ` Mathieu Desnoyers
2007-11-01  9:37                             ` Roland McGrath
2007-11-01 11:24                               ` Mathieu Desnoyers
2007-11-08 19:31                                 ` David Smith
2007-11-08 19:36                                   ` Mathieu Desnoyers
2007-11-08 19:45                                     ` David Smith
2007-11-09 16:36                                     ` David Smith
2007-11-11 23:24                                       ` Mathieu Desnoyers
2007-09-19 17:32     ` [patch 1/4] Linux Kernel Markers - Architecture Independent Code Denys Vlasenko
2007-09-19 18:46       ` Mathieu Desnoyers
2007-09-19 18:50         ` Mathieu Desnoyers
2007-09-21  0:58   ` Steven Rostedt
2007-09-21 13:45     ` Mathieu Desnoyers
2007-09-18 21:13 ` [patch 2/4] Linux Kernel Markers - Use instrumentation kconfig menu Mathieu Desnoyers
2007-09-18 21:13 ` [patch 3/4] Linux Kernel Markers - Documentation Mathieu Desnoyers
2007-09-18 23:22   ` Randy Dunlap
2007-09-19 11:18     ` Mathieu Desnoyers
2007-09-18 21:13 ` [patch 4/4] Port of blktrace to the Linux Kernel Markers Mathieu Desnoyers
2007-09-21  1:03   ` Steven Rostedt
2007-09-21 13:46     ` Mathieu Desnoyers
  -- strict thread matches above, loose matches on Subject: below --
2007-09-17 18:46 [patch 0/4] " Mathieu Desnoyers
2007-09-17 18:46 ` [patch 1/4] Linux Kernel Markers - Architecture Independent Code Mathieu Desnoyers
2007-08-27 16:05 [patch 0/4] Linux Kernel Markers Mathieu Desnoyers
2007-08-27 16:05 ` [patch 1/4] Linux Kernel Markers - Architecture Independent Code Mathieu Desnoyers
2007-08-20 20:27 [patch 0/4] Linux Kernel Markers Mathieu Desnoyers
2007-08-20 20:27 ` [patch 1/4] Linux Kernel Markers - Architecture Independent Code Mathieu Desnoyers
2007-08-21  0:43   ` Rusty Russell
2007-08-24 16:26     ` Mathieu Desnoyers
2007-08-25 20:49       ` Rusty Russell
2007-08-25 21:26         ` Mathieu Desnoyers
2007-08-12 15:10 [patch 0/4] Linux Kernel Markers Mathieu Desnoyers
2007-08-12 15:10 ` [patch 1/4] Linux Kernel Markers - Architecture Independent Code Mathieu Desnoyers

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