linux-kernel - Re: [PATCH v6 1/3] trace: Make removal of ring buffer pages atomic

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Message-ID: <CAL26m8KgvuUGhK_T91fM2dNtFt4+KSOb5-C8yNiZ888BZW1PEg@mail.gmail.com>
Date:	Wed, 2 May 2012 23:40:06 -0700
From:	Vaibhav Nagarnaik <vnagarnaik@...gle.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>,
	Laurent Chavey <chavey@...gle.com>,
	Justin Teravest <teravest@...gle.com>,
	David Sharp <dhsharp@...gle.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 1/3] trace: Make removal of ring buffer pages atomic

On Wed, May 2, 2012 at 6:55 PM, Steven Rostedt <rostedt@...dmis.org> wrote:
> Hmm, something in this patch breaks buffers_size_kb and friends.

I checked and I guess you are referring to the initial state of the
buffer_size_kb, which returns:
0 (expanded: 1408)
instead of:
7 (expanded: 1408)

I found this got in with the earlier patch which added per-cpu
buffer_size_kb. I will send a small fix-up patch for it.

After expanding the ring buffer to various sizes, I couldn't find any
other breakage. Is there any other behavior that you saw as odd?



Vaibhav Nagarnaik
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