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From: Steven Rostedt <srostedt@redhat.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>,
	Frederic Weisbecker <fweisbec@gmail.com>,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] ring_buffer: enlarge RB_MAX_SMALL_DATA
Date: Wed, 15 Apr 2009 10:23:40 -0400	[thread overview]
Message-ID: <1239805420.21121.72.camel@localhost.localdomain> (raw)
In-Reply-To: <20090415141221.GE12760@elte.hu>


On Wed, 2009-04-15 at 16:12 +0200, Ingo Molnar wrote:
> * Steven Rostedt <srostedt@redhat.com> wrote:

> Yeah - format specifications are always good. They weaken ABI 
> bindings and allow more flexibility both on the tool and the kernel 
> side.
> 
> > We could ask Linus to pull this into 30 because it is a API 
> > change.
> 
> Apps could assume if the format file is not there it's the .30 
> format.

My fear is that they are written before the change, and will not know
about a format file existing. Then those apps will break on 31.

But this is still new, and the only user I know of at the moment is the
University student doing the ftrace GUI. I'll keep him informed.

Thanks,

-- Steve



      reply	other threads:[~2009-04-15 14:24 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-04-13  3:00 Lai Jiangshan
2009-04-13 14:43 ` Steven Rostedt
2009-04-15  9:14   ` Lai Jiangshan
2009-04-15 10:32     ` Ingo Molnar
2009-04-15 13:45     ` Steven Rostedt
2009-04-15 14:12       ` Ingo Molnar
2009-04-15 14:23         ` Steven Rostedt [this message]

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