linux-kernel - Re: Updated direct IO optimization patchkit v2

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Message-ID: <x4939gysj1v.fsf@segfault.boston.devel.redhat.com>
Date:	Thu, 18 Aug 2011 13:53:16 -0400
From:	Jeff Moyer <jmoyer@...hat.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	hch@...radead.org
Subject: Re: Updated direct IO optimization patchkit v2

Andi Kleen <andi@...stfloor.org> writes:

> Various micro optimizations of the block direct IO path.
>
> This addresses all review comments and adds an additional prefetch
> optimization that gives another about 0.3% in a large macro benchmark.
> Overall the patchkit is worht about 2.2% in the same macro benchmark.
>
> I also ported it to current mainline, resolving some conflicts with
> hch's recent changes to direct-io.

Hi, Andi,

If you get rid of the unlikely I pointed out in patch 11 and address my
question on patch 6 (about always_inline) and repost, I'll ack the
series.  I was hoping hch or Jens would chime in on patch 10, but it
seems they're busy.

Cheers,
Jeff
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