From mboxrd@z Thu Jan  1 00:00:00 1970
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: Re: [RFC -v3 PATCH 2/3] sched: add yield_to function
Date: Wed, 05 Jan 2011 11:24:14 +0100
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Cc: Avi Kivity <avi@redhat.com>, Rik van Riel <riel@redhat.com>,
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	Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>,
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To: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
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On Wed, 2011-01-05 at 17:40 +0900, KOSAKI Motohiro wrote:
> > > If you are interesting GIL mess and issue, please feel free to ask more.
> > 
> > I suggest looking into an explicit round-robin scheme, where each thread 
> > adds itself to a queue and an unlock wakes up the first waiter.
> 
> I'm sure you haven't try your scheme. but I did. It's slow.

Of course it is, but then your locking scheme (GIL) is the problem, not
the locking constructs.