linux-kernel - Re: [PATCH 09/12] generic rwsem: implement down_read

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Message-ID: <7551.1273668390@redhat.com>
Date:	Wed, 12 May 2010 13:46:30 +0100
From:	David Howells <dhowells@...hat.com>
To:	Michel Lespinasse <walken@...gle.com>
Cc:	dhowells@...hat.com,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Mike Waychison <mikew@...gle.com>,
	Suleiman Souhlal <suleiman@...gle.com>,
	Ying Han <yinghan@...gle.com>
Subject: Re: [PATCH 09/12] generic rwsem: implement down_read_unfair

Michel Lespinasse <walken@...gle.com> wrote:

>  /*
> + * lock for reading - skip waiting writers
> + */

They may also skip waiting readers, if such are queued behind a writer.

David
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