Date: Mon, 4 Aug 2008 15:25:32 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: prasad@linux.vnet.ibm.com
Cc: linux-kernel@vger.kernel.org, dwilder@us.ibm.com, hch@infradead.org,
       Steven Rostedt <rostedt@goodmis.org>
Subject: Re: [Patch 0/2] Renaming 'trace' to 'relay' and enhancements to
 'relay'
Message-Id: <20080804152532.9367abff.akpm@linux-foundation.org>
In-Reply-To: <20080804040439.GA6415@in.ibm.com>
References: <20080804040439.GA6415@in.ibm.com>
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On Mon, 4 Aug 2008 09:34:39 +0530
"K.Prasad" <prasad@linux.vnet.ibm.com> wrote:

> Hi Andrew,
> 	Please find the patches that enhance the 'trace' infrastructure
> (available in the -mm tree) and which introduce two new APIs
> relay_dump() and relay_printk().
> 
> These patches were submitted earlier as enhancements to trace, but were
> renamed and merged with 'relay' based on your suggestion
> (http://lkml.org/lkml/2008/5/28/207).
> 
> The patches apply on 2.6.27-rc1-mm1 and have been tested on an x86
> machine. Kindly accept them.
> 

I'm a bit perplexed by these trace patches
(http://userweb.kernel.org/~akpm/mmotm/broken-out/trace-code-and-documentation.patch).
 Is it useful?  Will it be useful?  Has anyone expressed
interest/intent to use it, etc?  I haven't heard much noise about it
and I'm struggling to justify merging it.

Also, it's starting to look somewhat similar to ftrace, which also
provides sort of high-bandwidth per-cpu channels into userspace for
tracing purposes.
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