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-rw-r--r--Documentation/filesystems/ext4.txt24
1 files changed, 13 insertions, 11 deletions
diff --git a/Documentation/filesystems/ext4.txt b/Documentation/filesystems/ext4.txt
index 7be02ac5fa36..18b5ec8cea45 100644
--- a/Documentation/filesystems/ext4.txt
+++ b/Documentation/filesystems/ext4.txt
@@ -134,15 +134,9 @@ ro Mount filesystem read only. Note that ext4 will
134 mount options "ro,noload" can be used to prevent 134 mount options "ro,noload" can be used to prevent
135 writes to the filesystem. 135 writes to the filesystem.
136 136
137journal_checksum Enable checksumming of the journal transactions.
138 This will allow the recovery code in e2fsck and the
139 kernel to detect corruption in the kernel. It is a
140 compatible change and will be ignored by older kernels.
141
142journal_async_commit Commit block can be written to disk without waiting 137journal_async_commit Commit block can be written to disk without waiting
143 for descriptor blocks. If enabled older kernels cannot 138 for descriptor blocks. If enabled older kernels cannot
144 mount the device. This will enable 'journal_checksum' 139 mount the device.
145 internally.
146 140
147journal=update Update the ext4 file system's journal to the current 141journal=update Update the ext4 file system's journal to the current
148 format. 142 format.
@@ -263,10 +257,18 @@ resuid=n The user ID which may use the reserved blocks.
263 257
264sb=n Use alternate superblock at this location. 258sb=n Use alternate superblock at this location.
265 259
266quota 260quota These options are ignored by the filesystem. They
267noquota 261noquota are used only by quota tools to recognize volumes
268grpquota 262grpquota where quota should be turned on. See documentation
269usrquota 263usrquota in the quota-tools package for more details
264 (http://sourceforge.net/projects/linuxquota).
265
266jqfmt=<quota type> These options tell filesystem details about quota
267usrjquota=<file> so that quota information can be properly updated
268grpjquota=<file> during journal replay. They replace the above
269 quota options. See documentation in the quota-tools
270 package for more details
271 (http://sourceforge.net/projects/linuxquota).
270 272
271bh (*) ext4 associates buffer heads to data pages to 273bh (*) ext4 associates buffer heads to data pages to
272nobh (a) cache disk block mapping information 274nobh (a) cache disk block mapping information