linux-kernel - Re: [PATCH 1/6] Extend completions to provide XFS object flush requirements

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Message-ID: <20080626113209.GK11558@disturbed>
Date:	Thu, 26 Jun 2008 21:32:09 +1000
From:	Dave Chinner <david@...morbit.com>
To:	Matthew Wilcox <matthew@....cx>
Cc:	xfs@....sgi.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/6] Extend completions to provide XFS object flush
	requirements

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@...morbit.com
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