linux-kernel - Re: [PATCH 1/2] mmiotrace: fix buffer overrun detection

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Date:	Mon, 24 Nov 2008 21:30:24 +0100
From:	"Frédéric Weisbecker" <fweisbec@...il.com>
To:	"Pekka Paalanen" <pq@....fi>
Cc:	"Ingo Molnar" <mingo@...e.hu>,
	"Steven Rostedt" <rostedt@...dmis.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] mmiotrace: fix buffer overrun detection

2008/11/24 Pekka Paalanen <pq@....fi>:
> On Sun, 23 Nov 2008 20:34:13 +0100
> Ingo Molnar <mingo@...e.hu> wrote:
>
>> Sure - applied them to tip/tracing/urgent:
>>
>>   fb91ee6: tracing, doc: update mmiotrace documentation
>>   7ee1768: x86, mmiotrace: fix buffer overrun detection
>>
>> Does this make mmiotrace fully functional in .28 ?
>
> Oh right, the busylooping bug when echoing into trace_marker,
> I already forgot about that, since I couldn't reproduce it.
> I guess there's nothing to do, until someone finds a way to
> reproduce it.


Hi Pekka.

Are you talking about this old bug that broke the pipe?
If so, you fixed it yourself partially with a patch that corrected
tracing_read_pipe.
Another origin was the none tracer that set tracer_enabled to 0.
But i has been fixed with the nop tracer.

Perhaps you are talking of something else?
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