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From: David Howells <dhowells@redhat.com>
In-Reply-To: <1272430986-20436-1-git-send-email-xiaosuo@gmail.com>
References: <1272430986-20436-1-git-send-email-xiaosuo@gmail.com>
To: Changli Gao <xiaosuo@gmail.com>
Cc: dhowells@redhat.com, Ingo Molnar <mingo@elte.hu>,
       Alexander Viro <viro@zeniv.linux.org.uk>,
       Andrew Morton <akpm@linux-foundation.org>,
       "Eric W. Biederman" <ebiederm@xmission.com>,
       Davide Libenzi <davidel@xmailserver.org>,
       Roland Dreier <rolandd@cisco.com>,
       Stefan Richter <stefanr@s5r6.in-berlin.de>,
       Peter Zijlstra <a.p.zijlstra@chello.nl>,
       "David S. Miller" <davem@davemloft.net>,
       Eric Dumazet <dada1@cosmosbay.com>, Christoph Lameter <cl@linux.com>,
       Andreas Herrmann <andreas.herrmann3@amd.com>,
       Thomas Gleixner <tglx@linutronix.de>, Takashi Iwai <tiwai@suse.de>,
       linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC] sched: implement the exclusive wait queue as a LIFO queue
Date: Wed, 28 Apr 2010 10:32:02 +0100
Message-ID: <8526.1272447122@redhat.com>
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 589
Lines: 17

Changli Gao <xiaosuo@gmail.com> wrote:

> @@ -50,6 +48,7 @@ struct wait_bit_queue {
>  struct __wait_queue_head {
>  	spinlock_t lock;
>  	struct list_head task_list;
> +	struct list_head task_list_ex;

It would be preferable it if you could avoid making struct __wait_queue_head
bigger.  That will increase the size of a lot of things.

David
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