linux-ext4 - [PATCH 0/7] e2fsprogs: Using discard in e2fsprogs tools

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Date:	Tue, 26 Oct 2010 19:54:11 +0200
From:	Lukas Czerner <lczerner@...hat.com>
To:	linux-ext4@...r.kernel.org
Cc:	tytso@....edu, sandeen@...hat.com, adilger@...ger.ca,
	lczerner@...hat.com
Subject: [PATCH 0/7] e2fsprogs: Using discard in e2fsprogs tools

Hi all,

We have came to consensus about using discard in e2fsprogs tools. These
patches generalize use of discard in e2fsprogs tools introduce changes
in mke2fs and e2fsck.

Short summary
-------------

 [PATCH 1/7] e2fsprogs: Add discard function into struct_io_manager
   * generalize use of discard in e2fsprogs and let any tool in e2fsprogs
     take advantage of it withou need to write its own BLKDISCARD wrappers.

 [PATCH 2/7] e2fsprogs: Add discard_zeroes_data into struct_io_manager
   * Give the opportunity for any io_manager to check if device discard
     support zeroes data and save the results into io_manager itself for
     use in any e2fsprofs tool.

 [PATCH 3/7] e2fsck: Keep track of problems during the check

 [PATCH 4/7] e2fsck: Discard free data and inode blocks.
   * In pass 5 after the group descriptors has been changed discard free
     data and inode blocks. The consensus was that it should be OFF by
     default, so it is.
   * Introduce new paid of extended options discard/nodiscard.

 [PATCH 5/7] mke2fs: Change -K option to discard/nodiscard
   * To the same of consistency and to gain ability to easily default it
     the new pair of extended options has been added.
   * The consensus was that it should stay ON by default, so it is.

 [PATCH 6/7] mke2fs: Use unix_discard() for discards

 [PATCH 7/7] mke2fs: Use io_manager discard_zeroes_data property


Any comments appreciated!

Thanks!

-Lukas

---
[PATCH 1/7] e2fsprogs: Add discard function into struct_io_manager
[PATCH 2/7] e2fsprogs: Add discard_zeroes_data into struct_io_manager
[PATCH 3/7] e2fsck: Keep track of problems during the check
[PATCH 4/7] e2fsck: Discard free data and inode blocks.
[PATCH 5/7] mke2fs: Change -K option to discard/nodiscard
[PATCH 6/7] mke2fs: Use unix_discard() for discards
[PATCH 7/7] mke2fs: Use io_manager discard_zeroes_data property

 e2fsck/e2fsck.8.in   |   14 ++++++++
 e2fsck/e2fsck.h      |    2 +
 e2fsck/pass5.c       |   81 +++++++++++++++++++++++++++++++++++++++++++++
 e2fsck/problem.c     |   31 ++++++++++++-----
 e2fsck/problem.h     |    3 ++
 e2fsck/problemP.h    |    1 +
 e2fsck/unix.c        |   10 +++++-
 lib/ext2fs/ext2_io.h |    3 ++
 lib/ext2fs/test_io.c |    1 +
 lib/ext2fs/unix_io.c |   53 +++++++++++++++++++++++++++++
 misc/mke2fs.8.in     |   18 ++++++----
 misc/mke2fs.c        |   90 +++++++++++--------------------------------------
 12 files changed, 219 insertions(+), 88 deletions(-)

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