linux-kernel - Re: [RFC git tree] Userspace RCU (urcu) for Linux (repost)

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Message-ID: <20090206130640.GB10918@linux.vnet.ibm.com>
Date:	Fri, 6 Feb 2009 05:06:40 -0800
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Mathieu Desnoyers <compudj@...stal.dyndns.org>
Cc:	ltt-dev@...ts.casi.polymtl.ca, linux-kernel@...r.kernel.org,
	Robert Wisniewski <bob@...son.ibm.com>
Subject: Re: [RFC git tree] Userspace RCU (urcu) for Linux (repost)

On Thu, Feb 05, 2009 at 11:58:41PM -0500, Mathieu Desnoyers wrote:
> (sorry for repost, I got the ltt-dev email wrong in the previous one)
> 
> Hi Paul,
> 
> I figured out I needed some userspace RCU for the userspace tracing part
> of LTTng (for quick read access to the control variables) to trace
> userspace pthread applications. So I've done a quick-and-dirty userspace
> RCU implementation.
> 
> It works so far, but I have not gone through any formal verification
> phase. It seems to work on paper, and the tests are also OK (so far),
> but I offer no guarantee for this 300-lines-ish 1-day hack. :-) If you
> want to comment on it, it would be welcome. It's a userland-only
> library. It's also currently x86-only, but only a few basic definitions
> must be adapted in urcu.h to port it.
> 
> Here is the link to my git tree :
> 
> git://lttng.org/userspace-rcu.git
> 
> http://lttng.org/cgi-bin/gitweb.cgi?p=userspace-rcu.git;a=summary

Very cool!!!  I will take a look!

I will also point you at a few that I have put together:

git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/perfbook.git

(In the CodeSamples/defer directory.)

							Thanx, Paul
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