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Message-ID: <20070418103252.GA1621@elte.hu>
Date: Wed, 18 Apr 2007 12:32:52 +0200
From: Ingo Molnar <mingo@...e.hu>
To: Christoph Pfister <christophpfister@...il.com>
Cc: S.Çağlar Onur <caglar@...dus.org.tr>,
linux-kernel@...r.kernel.org,
Michael Lothian <mike@...eburn.co.uk>,
Christophe Thommeret <hftom@...e.fr>,
Jurgen Kofler <kaffeine@....net>,
Ulrich Drepper <drepper@...hat.com>
Subject: Re: Kaffeine problem with CFS
hm. I've reviewed all uses of demux_lock. ./src/xine-engine/demux.c does
this:
pthread_mutex_unlock( &stream->demux_lock );
lprintf ("sched_yield\n");
sched_yield();
pthread_mutex_lock( &stream->demux_lock );
why is this done? CFS has definitely changed the yield implementation so
there could be some connection.
OTOH, in the 'hung' state none of the straces suggests any yield() call.
Ingo
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