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Date: Wed, 1 Oct 2008 09:23:00 +0200
From: Ingo Molnar <mingo@elte.hu>
To: =?iso-8859-1?Q?Fr=E9d=E9ric?= Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>, linux-kernel@vger.kernel.org,
       Thomas Gleixner <tglx@linutronix.de>,
       Peter Zijlstra <peterz@infradead.org>,
       Andrew Morton <akpm@linux-foundation.org>,
       Linus Torvalds <torvalds@linux-foundation.org>,
       Mathieu Desnoyers <compudj@krystal.dyndns.org>,
       Pekka Paalanen <pq@iki.fi>, Martin Bligh <mbligh@google.com>
Subject: Re: [PATCH 0/2] ring_buffer: updates for linux-tip
Message-ID: <20081001072300.GD9366@elte.hu>
References: <20081001042951.412019606@goodmis.org> <c62985530810010020u1f3f44e1l6b8fb2f31c35d215@mail.gmail.com>
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* Frédéric Weisbecker <fweisbec@gmail.com> wrote:

> 2008/10/1 Steven Rostedt <rostedt@goodmis.org>:
> > The first patch is just a lockdep clean up of the ring buffer.
> >
> > The next patch is a new locking design. It is not lockless (yet) but
> > the locking is a bit cleaner than the original. The basic idea is
> > that the reader now has its own page to read from that is not in
> > the ring buffer. When the reader (a consumer) finishes a page, it
> > then grabs a lock to pull out a new page from the ring buffer and
> > replace it with the one that it just finished reading.
> 
> Good idea! Sounds a real saner approach.

are the tracer problems you've reported yesterday fixed in latest 
tip/master?

	Ingo