[opensuse] Ext3 dir_index feature not available ?

Hello,

according to http://wiki.dovecot.org/MailboxFormat/Maildir I wanted to
enable the "dir_index" feature for my EXT3 filesystems. The Wiki page
describes, that "CONFIG_EXT3_INDEX=y" must be enabled in the Kernel.

Unfortunately I can not found this option in openSUSE's default kernel
and also not in the current vanilla kernel:

$ grep CONFIG_EXT3_INDEX /boot/config-2.6.18.8-0.5-default \
/usr/src/linux-2.6.22.5/.config
(nothing)

But this option is references in fs/ext3/*:

$ grep -Rl EXT3_INDEX /usr/src/linux-2.6.22.5/
/usr/src/linux-2.6.22.5/fs/cifs/cifspdu.h
/usr/src/linux-2.6.22.5/fs/ext3/dir.c
/usr/src/linux-2.6.22.5/fs/ext3/ialloc.c
/usr/src/linux-2.6.22.5/fs/ext3/namei.c
/usr/src/linux-2.6.22.5/include/linux/ext3_fs.h
/usr/src/linux-2.6.22.5/include/linux/ext3_jbd.h

I also could not find any dir_index related functions within the ext3.ko
kernel module:

$ nm /lib/modules/2.6.18.8-0.5-default/kernel/fs/ext3/ext3.ko | grep
make_indexed_dir

It seems to me, that the Kernel developers forgot to include the option
"EXT3_INDEX" into /usr/src/linux-2.6.22.5/fs/Kconfig.

Does anyone has experience with this issue? I wanted to double check
this before filing a bug report.

Greetings,
Björn



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