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SubjectRe: EFS in 2.3.2 ???
Hi Henning, Axel.

Axel: Patch for your attention enclosed...

>> I note that the 2.3.2 kernel tree includes a new filesystem
>> called EFS, but there is apparently no documentation on what
>> it is - no entries in Configure.help and nothing elsewhere
>> in the Documentation tree either...

>> Does anybody know anything about this file system and what
>> it's for?

> A pointer to further information: http://hhv.de/LVI/h/efs.html

Ah...thanks for that...

Enclosed is a patch to add relevant text to the Configure.help file to
provide for that option. It also splits up a rather long paragraph in
the umsdos help that followed it into several smaller paragraphs.

Hopefully, this will find its way into the 2.3.3 kernel...

Best wishes from Riley.

+----------------------------------------------------------------------+
| There is something frustrating about the quality and speed of Linux |
| development, ie., the quality is too high and the speed is too high, |
| in other words, I can implement this XXXX feature, but I bet someone |
| else has already done so and is just about to release their patch. |
+----------------------------------------------------------------------+
* ftp://ftp.MemAlpha.cx/pub/rhw/Linux
* http://www.MemAlpha.cx--- linux-2.3.2/Documentation/Configure.help~ Fri May 14 16:59:54 1999
+++ linux-2.3.2/Documentation/Configure.help Sun May 16 20:35:29 1999
@@ -7199,7 +7199,25 @@
say M here and read Documentation/modules.txt. The module will be
called vfat.o.

+EFS filesystem support (read only)
+CONFIG_EFS_FS
+ The Extent File System (efs) is Silicon Graphics' early block device
+ filesystem, widely used on pre-6.0 versions of IRIX. Since 6.0, xfs
+ has been bundled with IRIX and users are being encouraged to migrate
+ to xfs filesystems. IRIX support for efs will be read-only in
+ versions of IRIX beyond 6.5, however efs is still very much in use
+ on SGI software distribution CDs.
+
+ If you want to compile this as a module ( = code which can be
+ inserted in and removed from the running kernel whenever you want),
+ say M here and read Documentation/modules.txt. The module will be
+ called efs.o.
+
+ Note that the filesystem of your root partition (the one containing
+ the directory /) cannot be a module, so saying M could be dangerous.
+ If unsure, say N.
+
-umsdos: Unix like fs on top of std MSDOS fs
+umsdos: Unix like fs on top of standard MSDOS fs
CONFIG_UMSDOS_FS
Say Y here if you want to run Linux from within an existing DOS
partition of your hard drive. The advantage of this is that you can
@@ -7207,20 +7225,25 @@
backing everything up and restoring afterwards) and hence you're
able to quickly try out Linux or show it to your friends; the
disadvantage is that Linux becomes susceptible to DOS viruses and
- that UMSDOS is somewhat slower than ext2fs. Another use of UMSDOS
+ that UMSDOS is somewhat slower than ext2fs.
- is to write files with long unix filenames to MSDOS floppies; it
- also allows Unix-style softlinks and owner/permissions of files on
- MSDOS floppies. You will need a program called umssync in order to
- make use of umsdos; read Documentation/filesystems/umsdos.txt.
+
+ Another use of UMSDOS is to write files with long unix filenames
+ to MSDOS floppies; it also allows Unix-style softlinks and
+ owner/permissions of files on MSDOS floppies. You will need a
+ program called umssync in order to make use of umsdos; read
+ Documentation/filesystems/umsdos.txt.

This option enlarges your kernel by about 25 kB and it only works if
- you said Y to both "fat fs support" and "msdos fs support" above. If
+ you said Y to both "fat fs support" and "msdos fs support" above.
- you want to compile this as a module ( = code which can be inserted
- in and removed from the running kernel whenever you want), say M
- here and read Documentation/modules.txt. The module will be called
- umsdos.o. Note that the filesystem of your root partition (the one
- containing the directory /) cannot be a module, so saying M could be
- dangerous. If unsure, say N.
+
+ If you want to compile this as a module ( = code which can be
+ inserted in and removed from the running kernel whenever you want),
+ say M here and read Documentation/modules.txt. The module will be
+ called umsdos.o.
+
+ Note that the filesystem of your root partition (the one containing
+ the directory /) cannot be a module, so saying M could be dangerous.
+ If unsure, say N.

/proc filesystem support
CONFIG_PROC_FS
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