linux-kernel - Re: linux-next: add utrace tree

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 29 Jan 2010 13:25:29 +0530
From:	Ananth N Mavinakayanahalli <ananth@...ibm.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Jim Keniston <jkenisto@...ibm.com>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	Kyle Moffett <kyle@...fetthome.net>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Fr??d??ric Weisbecker <fweisbec@...il.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Tom Tromey <tromey@...hat.com>,
	"Frank Ch. Eigler" <fche@...hat.com>, linux-next@...r.kernel.org,
	"H. Peter Anvin" <hpa@...or.com>, utrace-devel@...hat.com,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: linux-next: add utrace tree

On Fri, Jan 29, 2010 at 01:22:40PM +0530, Ananth N Mavinakayanahalli wrote:
> On Fri, Jan 29, 2010 at 08:39:07AM +0100, Ingo Molnar wrote:
> 
> ...
> 
> > When we merged kprobes ~10 years ago we made the (rather bad) mistake of 
> > merging a raw, opaque facility and leaving 'the rest' up to some other entity. 
> > IBM kprobes hackers vanished the day the original kprobes code went upstream 
> > and the high level entity never truly materialized in-kernel, for nearly a 
> > decade!
> 
> I don't know what you are referring to here... Kprobes was merged in
> 2.6.9 (~August 2004 -- less than 6 years ago). Since then, we did work
> on ports to powerpc and s390. We implemented kretprobes. We made it much
> scalable using RCU; we did the powerpc booster to skip single-step when
> possible, not to mention various bug fixes over the years.
> 
> Yes, we did not do the perf integration, but perf did not exist then, either.
> 
> Its simply wrong to say people 'vanished'.

Oh, and the x86 instruction decoder was initially implemented by us.
Masami has done a great job making it more complete.

Ananth
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/