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authorDiego Calleja <diegocg@gmail.com>2008-10-17 09:15:14 -0400
committerTheodore Ts'o <tytso@mit.edu>2008-10-17 09:15:14 -0400
commit22359f5745eb26bd3205a1ede7968c8944398220 (patch)
tree89bd181323f2f5851cc6233f778dd8fe48b1a2a6 /Documentation
parent01436ef2e4710317f826c4893b31c07b2d8df88c (diff)
ext4: Update Documentation/filesystems/ext4.txt
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@gmail.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/filesystems/ext4.txt32
1 files changed, 15 insertions, 17 deletions
diff --git a/Documentation/filesystems/ext4.txt b/Documentation/filesystems/ext4.txt
index eb154ef36c2a..174eaff7ded9 100644
--- a/Documentation/filesystems/ext4.txt
+++ b/Documentation/filesystems/ext4.txt
@@ -2,19 +2,24 @@
2Ext4 Filesystem 2Ext4 Filesystem
3=============== 3===============
4 4
5This is a development version of the ext4 filesystem, an advanced level 5Ext4 is an an advanced level of the ext3 filesystem which incorporates
6of the ext3 filesystem which incorporates scalability and reliability 6scalability and reliability enhancements for supporting large filesystems
7enhancements for supporting large filesystems (64 bit) in keeping with 7(64 bit) in keeping with increasing disk capacities and state-of-the-art
8increasing disk capacities and state-of-the-art feature requirements. 8feature requirements.
9 9
10Mailing list: linux-ext4@vger.kernel.org 10Mailing list: linux-ext4@vger.kernel.org
11Web site: http://ext4.wiki.kernel.org
11 12
12 13
131. Quick usage instructions: 141. Quick usage instructions:
14=========================== 15===========================
15 16
17Note: More extensive information for getting started with ext4 can be
18 found at the ext4 wiki site at the URL:
19 http://ext4.wiki.kernel.org/index.php/Ext4_Howto
20
16 - Compile and install the latest version of e2fsprogs (as of this 21 - Compile and install the latest version of e2fsprogs (as of this
17 writing version 1.41) from: 22 writing version 1.41.3) from:
18 23
19 http://sourceforge.net/project/showfiles.php?group_id=2406 24 http://sourceforge.net/project/showfiles.php?group_id=2406
20 25
@@ -36,11 +41,9 @@ Mailing list: linux-ext4@vger.kernel.org
36 41
37 # mke2fs -t ext4 /dev/hda1 42 # mke2fs -t ext4 /dev/hda1
38 43
39 Or configure an existing ext3 filesystem to support extents and set 44 Or to configure an existing ext3 filesystem to support extents:
40 the test_fs flag to indicate that it's ok for an in-development
41 filesystem to touch this filesystem:
42 45
43 # tune2fs -O extents -E test_fs /dev/hda1 46 # tune2fs -O extents /dev/hda1
44 47
45 If the filesystem was created with 128 byte inodes, it can be 48 If the filesystem was created with 128 byte inodes, it can be
46 converted to use 256 byte for greater efficiency via: 49 converted to use 256 byte for greater efficiency via:
@@ -104,8 +107,8 @@ exist yet so I'm not sure they're in the near-term roadmap.
104The big performance win will come with mballoc, delalloc and flex_bg 107The big performance win will come with mballoc, delalloc and flex_bg
105grouping of bitmaps and inode tables. Some test results available here: 108grouping of bitmaps and inode tables. Some test results available here:
106 109
107 - http://www.bullopensource.org/ext4/20080530/ffsb-write-2.6.26-rc2.html 110 - http://www.bullopensource.org/ext4/20080818-ffsb/ffsb-write-2.6.27-rc1.html
108 - http://www.bullopensource.org/ext4/20080530/ffsb-readwrite-2.6.26-rc2.html 111 - http://www.bullopensource.org/ext4/20080818-ffsb/ffsb-readwrite-2.6.27-rc1.html
109 112
1103. Options 1133. Options
111========== 114==========
@@ -214,9 +217,6 @@ noreservation
214bsddf (*) Make 'df' act like BSD. 217bsddf (*) Make 'df' act like BSD.
215minixdf Make 'df' act like Minix. 218minixdf Make 'df' act like Minix.
216 219
217check=none Don't do extra checking of bitmaps on mount.
218nocheck
219
220debug Extra debugging information is sent to syslog. 220debug Extra debugging information is sent to syslog.
221 221
222errors=remount-ro(*) Remount the filesystem read-only on an error. 222errors=remount-ro(*) Remount the filesystem read-only on an error.
@@ -253,8 +253,6 @@ nobh (a) cache disk block mapping information
253 "nobh" option tries to avoid associating buffer 253 "nobh" option tries to avoid associating buffer
254 heads (supported only for "writeback" mode). 254 heads (supported only for "writeback" mode).
255 255
256mballoc (*) Use the multiple block allocator for block allocation
257nomballoc disabled multiple block allocator for block allocation.
258stripe=n Number of filesystem blocks that mballoc will try 256stripe=n Number of filesystem blocks that mballoc will try
259 to use for allocation size and alignment. For RAID5/6 257 to use for allocation size and alignment. For RAID5/6
260 systems this should be the number of data 258 systems this should be the number of data