linux-kernel - [Question] perf header: Why the HEADER_EVENT

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Message-ID: <87txx1qsgz.fsf@kernel.org>
Date:	Sat, 21 Jul 2012 20:11:24 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [Question] perf header: Why the HEADER_EVENT_DESC is needed?

Hi Stephane,

I wonder why we need to save the event descriptions in the feature area
of file header. Since the perf_event_attr, its ids and the event name
are already saved in the header, it seems a duplicate work to do that.
For printing the information, we might reuse those info or evlist
directly IMHO.

Am I missing something?

Thanks,
Namhyung
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