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[RFC] [PATCH 0/4]Multiple block allocation and delayed allocation for ext3

From:  Mingming Cao <>
To:  ext2-devel <>, Andrew Morton <>, "Stephen C. Tweedie" <>, linux-kernel <>,
Subject:  [RFC] [PATCH 0/4]Multiple block allocation and delayed allocation for ext3
Date:  Sun, 17 Jul 2005 10:40:02 -0700
Cc:  Badari Pulavarty <>,,,,

Hi All, 

Here are the updated patches to support multiple block allocation and
delayed allocation for ext3 done by me, Badari and Suparna.

[PATCH 1/4] -- multiple block allocation for current ext3.

[PATCH 2/4] -- adding delayed allocation for writeback mode

[PATCH 3/4] -- generic support for cluster pages together in
mapge_writepages() to make use of getblocks() 

[PATCH 4/4] -- support multiple block allocation for ext3 writeback mode
through writepages(). 

Have done initial testing on dbench and tiobench on a 2.6.11 version of
this patch set. Dbench 8 thread throughput result is increased by 20%
with this patch set.

dbench comparison: (ext3-dm represents ext3+thispatchset)
tiobench comparison:

- bmap() support for delayed allocation
- page reserve flag to indicate the delayed allocation
- ordered mode support for delayed allocation
- "bh" support to enable blocksize = 1k/2k filesystems



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