Date: Thu, 26 Jun 2008 21:32:09 +1000
From: Dave Chinner <david@fromorbit.com>
To: Matthew Wilcox <matthew@wil.cx>
Cc: xfs@oss.sgi.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/6] Extend completions to provide XFS object flush
	requirements
Message-ID: <20080626113209.GK11558@disturbed>
Mail-Followup-To: Matthew Wilcox <matthew@wil.cx>, xfs@oss.sgi.com,
	linux-kernel@vger.kernel.org
References: <1214455277-6387-1-git-send-email-david@fromorbit.com> <1214455277-6387-2-git-send-email-david@fromorbit.com> <20080626112612.GW4392@parisc-linux.org>
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On Thu, Jun 26, 2008 at 05:26:12AM -0600, Matthew Wilcox wrote:
> On Thu, Jun 26, 2008 at 02:41:12PM +1000, Dave Chinner wrote:
> > XFS object flushing doesn't quite match existing completion semantics.  It
> > mixed exclusive access with completion. That is, we need to mark an object as
> > being flushed before flushing it to disk, and then block any other attempt to
> > flush it until the completion occurs.
> 
> This sounds like mutex semantics.  Why are the existing mutexes not
> appropriate for your needs?

Different threads doing wait and complete.

Cheers,

Dave.
-- 
Dave Chinner
david@fromorbit.com
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