linux-kernel - Re: [PATCH] tracing: Export key trace event symbols

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Message-ID: <20150422114451.298d8184@gandalf.local.home>
Date:	Wed, 22 Apr 2015 11:44:51 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Ron Rechenmacher <ron@...l.gov>
Cc:	David Ahern <dsahern@...il.com>,
	Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>,
	Christoph Hellwig <hch@...radead.org>,
	linux-kernel@...r.kernel.org,
	Arjan van de Ven <arjan@...ux.intel.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH] tracing: Export key trace event symbols

On Wed, 22 Apr 2015 09:36:20 -0600
David Ahern <dsahern@...il.com> wrote:

> One of the key requirements is a common time basis (e.g., 
> CLOCK_MONOTONIC or PERF_CLOCK) to be able to merge the events properly. 
> I have a kernel module that exports perf_clock to userspace via 
> clock_gettime; the 4.1 kernel should have the code that allows the clock 
> id to be specified providing a solution to this problem.

Ron,

I should have warned you. This is normal Linux kernel development.
Someone posts a simple patch to make something of there's work better,
and it ends up becoming a massive undertaking to come up with a solution
that makes Linux in general a better operating system ;-)

-- Steve
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