b6e3224fb2
This reverts commit e4c570c4cb, as
requested by Alexey:
"I think I gave a good enough arguments to not merge it.
To iterate:
* patch makes impossible to start using ext3 on EXT3_FS=n kernels
without reboot.
* this is done only for one pointer on task_struct"
None of config options which define task_struct are tristate directly
or effectively."
Requested-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
84 lines
2.8 KiB
Text
84 lines
2.8 KiB
Text
config EXT4_FS
|
|
tristate "The Extended 4 (ext4) filesystem"
|
|
select JBD2
|
|
select CRC16
|
|
help
|
|
This is the next generation of the ext3 filesystem.
|
|
|
|
Unlike the change from ext2 filesystem to ext3 filesystem,
|
|
the on-disk format of ext4 is not forwards compatible with
|
|
ext3; it is based on extent maps and it supports 48-bit
|
|
physical block numbers. The ext4 filesystem also supports delayed
|
|
allocation, persistent preallocation, high resolution time stamps,
|
|
and a number of other features to improve performance and speed
|
|
up fsck time. For more information, please see the web pages at
|
|
http://ext4.wiki.kernel.org.
|
|
|
|
The ext4 filesystem will support mounting an ext3
|
|
filesystem; while there will be some performance gains from
|
|
the delayed allocation and inode table readahead, the best
|
|
performance gains will require enabling ext4 features in the
|
|
filesystem, or formatting a new filesystem as an ext4
|
|
filesystem initially.
|
|
|
|
To compile this file system support as a module, choose M here. The
|
|
module will be called ext4.
|
|
|
|
If unsure, say N.
|
|
|
|
config EXT4_USE_FOR_EXT23
|
|
bool "Use ext4 for ext2/ext3 file systems"
|
|
depends on EXT3_FS=n || EXT2_FS=n
|
|
default y
|
|
help
|
|
Allow the ext4 file system driver code to be used for ext2 or
|
|
ext3 file system mounts. This allows users to reduce their
|
|
compiled kernel size by using one file system driver for
|
|
ext2, ext3, and ext4 file systems.
|
|
|
|
config EXT4_FS_XATTR
|
|
bool "Ext4 extended attributes"
|
|
depends on EXT4_FS
|
|
default y
|
|
help
|
|
Extended attributes are name:value pairs associated with inodes by
|
|
the kernel or by users (see the attr(5) manual page, or visit
|
|
<http://acl.bestbits.at/> for details).
|
|
|
|
If unsure, say N.
|
|
|
|
You need this for POSIX ACL support on ext4.
|
|
|
|
config EXT4_FS_POSIX_ACL
|
|
bool "Ext4 POSIX Access Control Lists"
|
|
depends on EXT4_FS_XATTR
|
|
select FS_POSIX_ACL
|
|
help
|
|
POSIX Access Control Lists (ACLs) support permissions for users and
|
|
groups beyond the owner/group/world scheme.
|
|
|
|
To learn more about Access Control Lists, visit the POSIX ACLs for
|
|
Linux website <http://acl.bestbits.at/>.
|
|
|
|
If you don't know what Access Control Lists are, say N
|
|
|
|
config EXT4_FS_SECURITY
|
|
bool "Ext4 Security Labels"
|
|
depends on EXT4_FS_XATTR
|
|
help
|
|
Security labels support alternative access control models
|
|
implemented by security modules like SELinux. This option
|
|
enables an extended attribute handler for file security
|
|
labels in the ext4 filesystem.
|
|
|
|
If you are not using a security module that requires using
|
|
extended attributes for file security labels, say N.
|
|
|
|
config EXT4_DEBUG
|
|
bool "EXT4 debugging support"
|
|
depends on EXT4_FS
|
|
help
|
|
Enables run-time debugging support for the ext4 filesystem.
|
|
|
|
If you select Y here, then you will be able to turn on debugging
|
|
with a command such as "echo 1 > /sys/kernel/debug/ext4/mballoc-debug"
|