linux-kernel - Re: [RFC] sched: implement the exclusive wait queue as a LIFO queue

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Message-ID: <p2t412e6f7f1004280647y42b06418m4734e74a4628b6bd@mail.gmail.com>
Date:	Wed, 28 Apr 2010 21:47:36 +0800
From:	Changli Gao <xiaosuo@...il.com>
To:	David Howells <dhowells@...hat.com>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Davide Libenzi <davidel@...ilserver.org>,
	Roland Dreier <rolandd@...co.com>,
	Stefan Richter <stefanr@...6.in-berlin.de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <dada1@...mosbay.com>,
	Christoph Lameter <cl@...ux.com>,
	Andreas Herrmann <andreas.herrmann3@....com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Takashi Iwai <tiwai@...e.de>, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC] sched: implement the exclusive wait queue as a LIFO queue

On Wed, Apr 28, 2010 at 5:34 PM, David Howells <dhowells@...hat.com> wrote:
>
> Can you split the wait queue code and differentiate exclusive wait queues with
> LIFO functionality from wait queues with FIFO functionality.  I can see why
> your suggestion is desirable.
>

OK. I will use two lists: one for non-exclusive wait queues, and the
other for exclusive wait queues, and I'll add new interfaces for LIFO
functionality instead of changing the current interfaces.

-- 
Regards，
Changli Gao(xiaosuo@...il.com)
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