linux-ext4 - [PATCH 0/5] Clean up I/O buffer allocation in e2fsprogs

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Date:	Mon,  7 May 2012 14:56:20 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Ext4 Developers List <linux-ext4@...r.kernel.org>
Cc:	ksumrall@...gle.com, Theodore Ts'o <tytso@....edu>
Subject: [PATCH 0/5] Clean up I/O buffer allocation in e2fsprogs

Andreas pointed out that original version of the last patch in this
series would break the 16k/64k blocksize regressiont tests on MacOS
10.5.  When I looked into addressing this, I realized that we didn't
need to request 16k or 64k alignment, and in general we often requested
aligned buffers when they were not necessary, and/or requested a larger
alignment factor than necessary.

This patch series cleans up this mess by refactoring the code so that
DIO alignment is calculated in one place, and so we have a common
routine for allocating I/O buffers used by e2fsprogs's I/O layer.

	    	       	   	   	   - Ted


Theodore Ts'o (5):
  libext2fs: move the alignment field from unix_io to the io_manager
  libext2fs: refactor Direct I/O alignment requirement calculations
  libext2fs: make read_bitmaps() more efficient when using direct I/O
  libext2fs: factor out I/O buffer allocation
  Support systems without posix_memalign() and memalign()

 lib/ext2fs/Makefile.in   |    9 +++++++-
 lib/ext2fs/ext2_io.h     |    3 +++
 lib/ext2fs/ext2fs.h      |    1 +
 lib/ext2fs/getsectsize.c |   26 +++++++++++++++++++++
 lib/ext2fs/inline.c      |   56 ++++++++++++++++++++++++++++++++++++++++++++--
 lib/ext2fs/inode.c       |    4 ++--
 lib/ext2fs/io_manager.c  |   17 ++++++++++++++
 lib/ext2fs/mmp.c         |   37 ++++++++----------------------
 lib/ext2fs/openfs.c      |    2 +-
 lib/ext2fs/rw_bitmaps.c  |   24 ++++++++------------
 lib/ext2fs/test_io.c     |    7 +++++-
 lib/ext2fs/unix_io.c     |   42 +++++++++++++++-------------------
 12 files changed, 154 insertions(+), 74 deletions(-)

-- 
1.7.10.rc3

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