Updated direct IO optimization patchkit v3

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To: akpm@xxxxxxxxxxxxxxxxxxxx
Subject: Updated direct IO optimization patchkit v3
From: Andi Kleen <andi@xxxxxxxxxxxxxx>
Date: Mon, 29 Aug 2011 16:23:11 -0700
Cc: linux-kernel@xxxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, viro@xxxxxxxxxxxxxxxxxx

Various micro optimizations of the block direct IO path.

v3: Minor updates from review. Added Acked-bys.

-Andi
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Follow-Ups:
- [PATCH 08/11] DIO: Remove unnecessary dio argument from dio_pages_present()
  - From: Andi Kleen
- [PATCH 07/11] DIO: Merge direct_io_walker into __blockdev_direct_IO
  - From: Andi Kleen
- [PATCH 10/11] VFS: Cache request_queue in struct block_device
  - From: Andi Kleen
- [PATCH 09/11] DIO: Remove unused dio parameter from dio_bio_add_page
  - From: Andi Kleen
- [PATCH 02/11] DIO: Fix a wrong comment
  - From: Andi Kleen
- [PATCH 06/11] DIO: Inline the complete submission path v2
  - From: Andi Kleen
- [PATCH 11/11] DIO: optimize cache misses in the submission path v2
  - From: Andi Kleen
- [PATCH 04/11] DIO: Use a slab cache for struct dio
  - From: Andi Kleen
- [PATCH 05/11] DIO: Separate map_bh from dio v2
  - From: Andi Kleen
- [PATCH 03/11] DIO: Rearrange fields in dio/dio_submit to avoid holes.
  - From: Andi Kleen
- [PATCH 01/11] DIO: Separate fields only used in the submission path from struct dio
  - From: Andi Kleen

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