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Message-ID: <20110901033902.GN32358@dastard> Date: Thu, 1 Sep 2011 13:39:02 +1000 From: Dave Chinner <david@...morbit.com> To: Christoph Hellwig <hch@...radead.org> Cc: Daniel Ehrenberg <dehrenberg@...gle.com>, linux-kernel@...r.kernel.org Subject: Re: Approaches to making io_submit not block On Wed, Aug 31, 2011 at 01:26:27AM -0400, Christoph Hellwig wrote: > On Tue, Aug 30, 2011 at 02:51:01PM -0700, Daniel Ehrenberg wrote: > > > Let filesystems handle this. ?I've actually prototyped it in XFS, > > > based on some pending work from Dave but at this point it's still butt > > > ugly. > > > > Great, would you be willing to let me see the draft code? > > > > Are you sure that there wouldn't be any benefit to having the code be > > in the aio/dio levels in terms of making it easier for file > > systems/reducing code duplication? > > I'll get it polished up and send it out for RFC once Dave sends out > the updated allocation workqueue patch. With this he moves all > allocator calls in XFS into a workqueue. My direct I/O patch uses that > fact to use that workqueue for the allocator call and let the existing > aio retry infrastructure retry the direct I/O operation one that > workqueue has finished. I thought you didn't like that code, Christoph. ;) I'll resend it soon. Cheers, Dave. -- Dave Chinner david@...morbit.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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