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Message-ID: <20081017111157.GA21503@mit.edu>
Date: Fri, 17 Oct 2008 07:11:57 -0400
From: Theodore Tso <tytso@....edu>
To: dcg <diegocg@...il.com>
Cc: linux-ext4@...r.kernel.org
Subject: Re: [PATCH] Update Documentation/filesystems/ext4.txt
On Fri, Oct 17, 2008 at 01:10:08AM +0200, dcg wrote:
> Since Ext4 is supposed to be stable in 2.6.28-rc, Documentation should be
> updated...it needs more updates, of course, I don't really know what
> parts should really be updated
Thanks, here's the revised version of the patch which I have in the
ext4 patch queue.
> PD: the wiki needs some update aswell.
I'll update the wiki after 2.6.28-rc1 and the merge window closes.
- Ted
ext4: Update Documentation/filesystems/ext4.txt
From: dcg <diegocg@...il.com>
Since Ext4 is supposed to be stable in 2.6.28-rc, ext4's documentation
file should be updated.
[ More updates also added by Theodore Ts'o. ]
Signed-off-by: Diego Calleja <diegocg@...il.com>
Signed-off-by: "Theodore Ts'o" <tytso@....edu>
Index: 2.6/Documentation/filesystems/ext4.txt
===================================================================
diff --git a/Documentation/filesystems/ext4.txt b/Documentation/filesystems/ext4.txt
index eb154ef..7fd9b9b 100644
--- a/Documentation/filesystems/ext4.txt
+++ b/Documentation/filesystems/ext4.txt
@@ -2,10 +2,10 @@
Ext4 Filesystem
===============
-This is a development version of the ext4 filesystem, an advanced level
-of the ext3 filesystem which incorporates scalability and reliability
-enhancements for supporting large filesystems (64 bit) in keeping with
-increasing disk capacities and state-of-the-art feature requirements.
+Ext4 is an an advanced level of the ext3 filesystem which incorporates
+scalability and reliability enhancements for supporting large filesystems
+(64 bit) in keeping with increasing disk capacities and state-of-the-art
+feature requirements.
Mailing list: linux-ext4@...r.kernel.org
@@ -14,7 +14,7 @@ Mailing list: linux-ext4@...r.kernel.org
===========================
- Compile and install the latest version of e2fsprogs (as of this
- writing version 1.41) from:
+ writing version 1.41.3) from:
http://sourceforge.net/project/showfiles.php?group_id=2406
@@ -36,11 +36,9 @@ Mailing list: linux-ext4@...r.kernel.org
# mke2fs -t ext4 /dev/hda1
- Or configure an existing ext3 filesystem to support extents and set
- the test_fs flag to indicate that it's ok for an in-development
- filesystem to touch this filesystem:
+ Or to configure an existing ext3 filesystem to support extents:
- # tune2fs -O extents -E test_fs /dev/hda1
+ # tune2fs -O extents /dev/hda1
If the filesystem was created with 128 byte inodes, it can be
converted to use 256 byte for greater efficiency via:
@@ -104,8 +102,8 @@ exist yet so I'm not sure they're in the near-term roadmap.
The big performance win will come with mballoc, delalloc and flex_bg
grouping of bitmaps and inode tables. Some test results available here:
- - http://www.bullopensource.org/ext4/20080530/ffsb-write-2.6.26-rc2.html
- - http://www.bullopensource.org/ext4/20080530/ffsb-readwrite-2.6.26-rc2.html
+ - http://www.bullopensource.org/ext4/20080818-ffsb/ffsb-write-2.6.27-rc1.html
+ - http://www.bullopensource.org/ext4/20080818-ffsb/ffsb-readwrite-2.6.27-rc1.html
3. Options
==========
@@ -253,8 +251,6 @@ nobh (a) cache disk block mapping information
"nobh" option tries to avoid associating buffer
heads (supported only for "writeback" mode).
-mballoc (*) Use the multiple block allocator for block allocation
-nomballoc disabled multiple block allocator for block allocation.
stripe=n Number of filesystem blocks that mballoc will try
to use for allocation size and alignment. For RAID5/6
systems this should be the number of data
--
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