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

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Message-ID: <20090206113600.GA21377@Krystal>
Date:	Fri, 6 Feb 2009 06:36:00 -0500
From:	Mathieu Desnoyers <compudj@...stal.dyndns.org>
To:	Bert Wesarg <bert.wesarg@...glemail.com>
Cc:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	ltt-dev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC git tree] Userspace RCU (urcu) for Linux

* Bert Wesarg (bert.wesarg@...glemail.com) wrote:
> On Fri, Feb 6, 2009 at 04:05, Mathieu Desnoyers
> <compudj@...stal.dyndns.org> wrote:
> > 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
> >
> Really interesting, thanks.
> 
> But you should use pthread_equal() for you equality test of pthread_t.
> 

It's merged, thanks !

Mathieu

> Regards,
> Bert
> 
> > Thanks,
> >
> > Mathieu
> 

-- 
Mathieu Desnoyers
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68
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