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

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Message-ID: <20080626112612.GW4392@parisc-linux.org>
Date:	Thu, 26 Jun 2008 05:26:12 -0600
From:	Matthew Wilcox <matthew@....cx>
To:	Dave Chinner <david@...morbit.com>
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 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?

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