From: Karim Yaghmour <karim@opersys.com>
To: Martin Bligh <mbligh@google.com>
Cc: "Frank Ch. Eigler" <fche@redhat.com>,
Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>,
prasanna@in.ibm.com, Andrew Morton <akpm@osdl.org>,
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>, 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>,
Michael Davidson <md@google.com>
Subject: Re: [PATCH] Linux Kernel Markers
Date: Wed, 20 Sep 2006 15:58:01 -0400 [thread overview]
Message-ID: <45119D49.2040607@opersys.com> (raw)
In-Reply-To: <45119934.8080001@google.com>
Martin Bligh wrote:
> You mean using the jump-over thing that was posted earlier?
> I thought the CPU erratas prevented doing that atomically
> properly. From my understanding of the last 24 hours discussion,
> it seemed like the ONLY thing we could do safely atomically was
> insert an int3. Which sucks, frankly, but still.
No. djprobes already does safely insert other stuff than just
int3, that's the whole point.
Here are the relevant postings by Hiramatsu-san:
http://marc.theaimsgroup.com/?l=linux-kernel&m=115875912510827&w=2
http://marc.theaimsgroup.com/?l=linux-kernel&m=115875867519302&w=2
Unless there's something *I* fundamentally misunderstood from
Hiramatsu-san's implementation and input, djprobes can replace
the 5-byte filler with a 5-byte unconditional jump. IOW your
mechanism works, no int3s involved.
Karim
next prev parent reply other threads:[~2006-09-20 19:48 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-18 23:45 [PATCH] Linux Kernel Markers 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 [this message]
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
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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