Subject: Re: Warning from ring buffer code (Was: Re: linux-next: tip tree 
 build warning)
From: Peter Zijlstra <peterz@infradead.org>
To: Steven Rostedt <srostedt@redhat.com>
Cc: Christopher Li <sparse@chrisli.org>,
       Jaswinder Singh Rajput <jaswinder@kernel.org>,
       Ingo Molnar <mingo@elte.hu>, Stephen Rothwell <sfr@canb.auug.org.au>,
       Thomas Gleixner <tglx@linutronix.de>, "H. Peter Anvin" <hpa@zytor.com>,
       linux-next@vger.kernel.org, linux-kernel@vger.kernel.org,
       linux-sparse@vger.kernel.org, Josh Triplett <josh@freedesktop.org>,
       Frederic Weisbecker <fweisbec@gmail.com>
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Date: Mon, 14 Sep 2009 20:23:41 +0200
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On Mon, 2009-09-14 at 14:17 -0400, Steven Rostedt wrote:
> Frederic, how big can one of those events get. The ring buffer (and
> TRACE_EVENT) allow up to almost a page size, which is very hefty for the
> stack. This code needs to either be rewritten or we need to set a limit
> to the size of a profile entry.

Yeah, that needs to get a re-write.. I've complained about this when it
went in.
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