linux-kernel - Re: [PATCH] perf/trace: use read() instead of lseek() in trace_event

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Message-ID: <20100514161255.GA8535@kryptos.osrc.amd.com>
Date:	Fri, 14 May 2010 18:12:55 +0200
From:	Borislav Petkov <bp@...64.org>
To:	Tom Zanussi <tzanussi@...il.com>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf/trace: use read() instead of lseek() in
 trace_event_read.c:skip()

From: Tom Zanussi <tzanussi@...il.com>
Date: Tue, May 04, 2010 at 11:02:10PM -0500

Hi,

> Here's a small fix for a problem affecting live-mode, introduced in the
> past day or so:
> 
> root@...picana:~# perf trace rwtop
> perf trace started with Perl
> script /root/libexec/perf-core/scripts/perl/rwtop.pl
> 
>   Fatal: did not read header event
> 
> commit d00a47cce569a3e660a8c9de5d57af28d6a9f0f7 added a skip()
> function to skip over e.g. header_page, but this doesn't work for live
> mode.  This patch re-implements skip() to use read() instead of
> lseek() to fix that.
> 
> Signed-off-by: Tom Zanussi <tzanussi@...il.com>

has this one landed in any tree in the meantime?

tip/perf/core doesn't have it.

-- 
Regards/Gruss,
Boris.

Operating Systems Research Center
Advanced Micro Devices, Inc.
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