From: fche@redhat.com (Frank Ch. Eigler)
To: Martin Bligh <mbligh@google.com>
Cc: Ingo Molnar <mingo@elte.hu>,
Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>,
Paul Mundt <lethal@linux-sh.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
Jes Sorensen <jes@sgi.com>, Andrew Morton <akpm@osdl.org>,
Tom Zanussi <zanussi@us.ibm.com>,
Richard J Moore <richardj_moore@uk.ibm.com>,
Michel Dagenais <michel.dagenais@polymtl.ca>,
Christoph Hellwig <hch@infradead.org>,
Greg Kroah-Hartman <gregkh@suse.de>,
Thomas Gleixner <tglx@linutronix.de>,
William Cohen <wcohen@redhat.com>,
ltt-dev@shafik.org, systemtap@sources.redhat.com,
Alan Cox <alan@lxorguk.ukuu.org.uk>
Subject: Re: [PATCH] Linux Kernel Markers
Date: 19 Sep 2006 12:49:20 -0400 [thread overview]
Message-ID: <y0m8xkfer8v.fsf@ton.toronto.redhat.com> (raw)
In-Reply-To: <4510151B.5070304@google.com>
Martin Bligh <mbligh@google.com> writes:
> [...] "compiled anew from original sources after deployment" seems
> the most practical to do to me. From second hand info on using
> systemtap, you seem to need the same compiler and source tree to
> work from anyway [...]
Not quite. Systemtap does not look at sources, only object code and
its embedded debugging information. (How many distributions keep
around compilable source trees?)
> [...] It seems like all we'd need to do is "list all references to
> function, freeze kernel, update all references, continue", [...]
One additional problem are external references made *by* the function.
Those too would all have to be relocated to the live data.
Live code patching is theoretically useful for all kinds of things,
but I've never heard it described as relatively simple before! :-)
- FChE
next prev parent reply other threads:[~2006-09-19 16:50 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-18 23:45 Mathieu Desnoyers
2006-09-19 0:41 ` Alan Cox
2006-09-19 1:10 ` Dave Jones
2006-09-19 8:11 ` Ingo Molnar
2006-09-19 8:13 ` Ingo Molnar
2006-09-19 15:11 ` Martin J. Bligh
2006-09-19 15:31 ` Ingo Molnar
2006-09-20 11:19 ` Andi Kleen
2006-09-19 15:46 ` Frank Ch. Eigler
2006-09-19 16:04 ` Martin Bligh
2006-09-19 16:39 ` Andrew Morton
2006-09-19 16:41 ` Martin Bligh
2006-09-19 6:38 ` S. P. Prasanna
2006-09-19 17:17 ` Martin Bligh
2006-09-19 7:05 ` S. P. Prasanna
2006-09-19 18:02 ` Martin Bligh
2006-09-19 21:04 ` Karim Yaghmour
2006-09-20 13:27 ` Masami Hiramatsu
2006-09-20 17:21 ` Karim Yaghmour
2006-09-20 17:15 ` Mathieu Desnoyers
2006-09-20 17:35 ` Karim Yaghmour
2006-09-20 18:08 ` Frank Ch. Eigler
2006-09-20 18:22 ` Martin Bligh
2006-09-20 18:50 ` Karim Yaghmour
2006-09-20 19:22 ` Martin Bligh
2006-09-20 19:43 ` Karim Yaghmour
2006-09-20 19:40 ` Martin Bligh
2006-09-20 19:58 ` Karim Yaghmour
2006-09-20 18:25 ` Karim Yaghmour
2006-09-20 17:41 ` Karim Yaghmour
2006-09-19 17:54 ` Mathieu Desnoyers
2006-09-19 18:01 ` Martin Bligh
2006-09-19 18:11 ` Mathieu Desnoyers
2006-09-20 0:08 ` Alan Cox
2006-09-20 0:52 ` Karim Yaghmour
2006-09-20 10:44 ` Alan Cox
2006-09-20 23:00 ` Richard J Moore
2006-09-23 15:34 ` score-boarding [was Re: [PATCH] Linux Kernel Markers] Hugh Dickins
2006-09-26 8:43 ` Richard J Moore
2006-09-20 1:08 ` [PATCH] Linux Kernel Markers S. P. Prasanna
2006-09-20 8:18 ` Richard J Moore
2006-09-20 10:32 ` Alan Cox
2006-09-20 11:50 ` Andi Kleen
2006-09-20 13:45 ` Richard J Moore
2006-09-22 12:33 ` Pavel Machek
2006-09-20 1:09 ` Mathieu Desnoyers
2006-09-19 19:13 ` Vara Prasad
2006-09-19 19:16 ` Mathieu Desnoyers
2006-09-19 19:24 ` Martin Bligh
2006-09-19 22:27 ` Satoshi Oshima
2006-09-19 19:26 ` Martin Bligh
2006-09-19 9:30 ` S. P. Prasanna
2006-09-19 20:12 ` Mathieu Desnoyers
2006-09-20 11:00 ` Masami Hiramatsu
2006-09-20 9:39 ` Helge Hafting
2006-09-20 10:30 ` Alan Cox
2006-09-20 13:23 ` Masami Hiramatsu
2006-09-19 16:36 ` Ingo Molnar
2006-09-19 16:41 ` Richard J Moore
2006-09-19 16:49 ` Frank Ch. Eigler [this message]
2006-09-19 16:52 ` Martin Bligh
2006-09-19 17:02 ` Frank Ch. Eigler
2006-09-19 16:06 ` Vara Prasad
2006-09-19 16:14 ` Martin Bligh
2006-09-19 17:43 ` Mathieu Desnoyers
2006-09-19 16:23 ` Karim Yaghmour
2006-09-19 16:17 ` Martin Bligh
2006-09-19 16:29 ` Karim Yaghmour
2006-09-19 16:55 ` Karim Yaghmour
2006-09-19 17:41 ` Mathieu Desnoyers
2006-09-20 17:33 ` Karim Yaghmour
2006-09-19 15:21 ` Frank Ch. Eigler
2006-09-20 13:20 ` Masami Hiramatsu
2006-09-20 13:32 ` Mathieu Desnoyers
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