From: "Frank Ch. Eigler" <fche@redhat.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>,
Peter Zijlstra <peterz@infradead.org>,
Fr??d??ric Weisbecker <fweisbec@gmail.com>,
LKML <linux-kernel@vger.kernel.org>,
Steven Rostedt <rostedt@goodmis.org>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
linux-next@vger.kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
utrace-devel@redhat.com, Linus <torvalds@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: Re: linux-next: add utrace tree
Date: Thu, 21 Jan 2010 20:25:16 -0500 [thread overview]
Message-ID: <20100122012516.GE22003@redhat.com> (raw)
In-Reply-To: <20100121170541.7425ff10.akpm@linux-foundation.org>
Hi -
On Thu, Jan 21, 2010 at 05:05:41PM -0800, Andrew Morton wrote:
> [...] ptrace is a nasty, complex part of the kernel which has a
> long history of problems, but it's all been pretty quiet in there
> for the the past few years. This leads one to expect that a
> rip-out-n-rewrite is a high-risk prospect. So, quite reasonably,
> one looks for a good reason for taking such risk. [...]
To the extent the discussion is colored by risk avoidance, then the
answer to that would consist of code reviews, and of course a look at
the actual historical reliability of this code. While some might
enjoy reminding us about the brief kerneloops incident in 2008, let's
keep in mind that versions of this code has been deployed in fedora
and rhel for several *years*, with millions of users. It's not some
rickety experiment.
To the extent the discussion is colored by the new features enabled
from this refactoring, well, there is Oleg's list which may or may not
have mentioned enabling systemtap's user-space probing. More details
can be furnished on demand. Several of the use examples were
constructed in good faith upon request from the kernel community
asking for more and more. But what's enough? Who knows, really?
- FChE
next prev parent reply other threads:[~2010-01-22 1:25 UTC|newest]
Thread overview: 125+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20100119211646.GF16096@redhat.com>
2010-01-20 0:12 ` linux-next: add utrace tree Stephen Rothwell
2010-01-20 5:49 ` Ingo Molnar
2010-01-20 6:15 ` Ananth N Mavinakayanahalli
2010-01-20 6:28 ` Ingo Molnar
2010-01-20 6:40 ` Ananth N Mavinakayanahalli
2010-01-20 10:43 ` Frederic Weisbecker
2010-01-20 6:59 ` Stephen Rothwell
2010-01-20 13:24 ` Frank Ch. Eigler
2010-01-20 7:29 ` Ingo Molnar
2010-01-20 14:38 ` Stephen Rothwell
2010-01-21 1:22 ` Roland McGrath
2010-01-22 0:17 ` Stephen Rothwell
2010-01-22 0:30 ` Andrew Morton
2010-01-22 0:31 ` Andrew Morton
2010-01-22 0:51 ` Frank Ch. Eigler
2010-01-22 1:05 ` Andrew Morton
2010-01-22 1:25 ` Frank Ch. Eigler [this message]
2010-01-22 1:32 ` Linus Torvalds
2010-01-22 2:22 ` Frank Ch. Eigler
2010-01-22 2:35 ` Linus Torvalds
2010-01-22 20:51 ` Oleg Nesterov
2010-01-23 6:04 ` Ingo Molnar
2010-01-23 12:03 ` Frank Ch. Eigler
2010-01-24 16:36 ` Thomas Gleixner
2010-01-22 1:28 ` Linus Torvalds
2010-01-22 5:21 ` Ananth N Mavinakayanahalli
2010-01-22 13:43 ` Valdis.Kletnieks
2010-01-22 19:39 ` Oleg Nesterov
2010-01-26 13:58 ` Pavel Machek
2010-01-22 18:28 ` Oleg Nesterov
2010-01-22 20:01 ` Frank Ch. Eigler
2010-01-22 20:16 ` Peter Zijlstra
2010-01-22 21:44 ` Frank Ch. Eigler
2010-01-22 21:59 ` Linus Torvalds
2010-01-22 22:13 ` Frank Ch. Eigler
2010-01-23 0:11 ` Linus Torvalds
2010-01-23 0:22 ` Linus Torvalds
2010-01-23 6:20 ` Kyle Moffett
2010-01-23 11:01 ` Alan Cox
2010-01-23 11:51 ` Frank Ch. Eigler
2010-01-23 15:57 ` Arnaldo Carvalho de Melo
2010-01-23 11:23 ` Ingo Molnar
2010-01-23 11:47 ` Frank Ch. Eigler
2010-01-23 19:48 ` tytso
2010-01-24 18:01 ` Frank Ch. Eigler
2010-01-25 1:42 ` Kyle Moffett
2010-01-25 4:55 ` tytso
2010-01-25 16:52 ` Linus Torvalds
2010-01-25 17:02 ` Frank Ch. Eigler
2010-01-25 17:36 ` Linus Torvalds
2010-01-25 17:45 ` Linus Torvalds
2010-01-25 17:54 ` Steven Rostedt
2010-01-25 18:03 ` Alan Cox
2010-01-25 18:12 ` Linus Torvalds
2010-01-25 18:30 ` Steven Rostedt
2010-01-25 18:45 ` Thomas Gleixner
2010-01-25 20:34 ` Ingo Molnar
2010-01-25 20:30 ` Mark Wielaard
2010-01-25 20:42 ` Linus Torvalds
2010-01-26 0:02 ` Renzo Davoli
2010-01-26 0:07 ` Linus Torvalds
2010-01-26 16:08 ` Johannes Stezenbach
2010-01-26 16:28 ` Linus Torvalds
2010-01-26 16:34 ` Christoph Hellwig
2010-01-28 23:53 ` Benjamin Herrenschmidt
2010-01-29 0:21 ` Linus Torvalds
2010-01-25 4:59 ` Ananth N Mavinakayanahalli
2010-01-25 10:13 ` Peter Zijlstra
2010-01-24 5:04 ` Linus Torvalds
2010-01-24 10:25 ` tytso
2010-01-24 13:20 ` Frank Ch. Eigler
2010-01-25 21:05 ` Tom Tromey
2010-01-25 21:41 ` Linus Torvalds
2010-01-26 14:21 ` Ananth N Mavinakayanahalli
2010-01-26 23:20 ` Tom Tromey
2010-01-26 23:37 ` Linus Torvalds
2010-01-27 6:52 ` Peter Zijlstra
2010-01-27 8:54 ` Ingo Molnar
2010-01-28 1:52 ` Jim Keniston
2010-01-28 8:55 ` Ingo Molnar
2010-01-29 0:59 ` Jim Keniston
2010-01-29 7:39 ` Ingo Molnar
2010-01-29 7:52 ` Ananth N Mavinakayanahalli
2010-01-29 7:55 ` Ananth N Mavinakayanahalli
2010-01-29 9:16 ` Ingo Molnar
2010-01-29 9:11 ` Ingo Molnar
2010-01-29 9:31 ` Ananth N Mavinakayanahalli
2010-01-29 9:51 ` Ingo Molnar
2010-01-29 18:13 ` Frank Ch. Eigler
2010-01-29 4:55 ` Ananth N Mavinakayanahalli
2010-01-29 7:42 ` Ingo Molnar
2010-01-30 17:49 ` Steven Rostedt
2010-01-30 17:59 ` Linus Torvalds
2010-02-02 6:47 ` Masami Hiramatsu
2010-01-27 10:43 ` Linus Torvalds
2010-01-27 10:55 ` Peter Zijlstra
2010-01-27 10:58 ` Peter Zijlstra
2010-01-27 11:04 ` Linus Torvalds
2010-01-27 16:01 ` Frederic Weisbecker
2010-01-27 11:05 ` Ananth N Mavinakayanahalli
2010-01-27 11:08 ` Peter Zijlstra
2010-01-27 11:20 ` Ananth N Mavinakayanahalli
2010-02-08 10:09 ` Avi Kivity
2010-01-27 11:07 ` Srikar Dronamraju
2010-01-27 13:59 ` Steven Rostedt
2010-01-27 17:42 ` H. Peter Anvin
2010-01-27 18:53 ` Steven Rostedt
2010-02-08 6:54 ` Pavel Machek
2010-02-08 9:30 ` H. Peter Anvin
2010-02-08 9:53 ` Arjan van de Ven
2010-01-27 19:18 ` H. Peter Anvin
2010-01-27 0:38 ` Frank Ch. Eigler
2010-01-26 15:00 ` Frank Ch. Eigler
2010-01-26 17:33 ` Andi Kleen
2010-01-26 18:46 ` Linus Torvalds
2010-01-26 21:02 ` Andi Kleen
2010-01-26 21:53 ` Oleg Nesterov
2010-01-26 22:03 ` Andi Kleen
2010-01-26 23:32 ` Oleg Nesterov
2010-01-26 21:30 ` Oleg Nesterov
2010-01-26 23:27 ` Tom Tromey
2010-01-23 8:05 ` Alexey Dobriyan
2010-01-22 17:45 ` Oleg Nesterov
2010-01-20 8:52 ` Peter Zijlstra
2010-01-20 13:01 ` Frank Ch. Eigler
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