[Quantian-general] 7.9.1 and 2.4.27 kernel

[Dirk Eddelbuettel]

On 4 January 2006 at 09:16, Christopher Heiny wrote:
| [Sorry Dirk - kmail is doing something really odd with addressing and 
| identities on messages from quantian-devel.  I'm resending this one.]
|
| On Wednesday 04 January 2006 07:15 am, picked up the following 
| transmission from Marco Caliari:
| > Here are my results about 2.4.27-om kernel and unionfs.
| > I remember you that I'm using "boot Quantian directly from hard disk
| > via the grub bootloader".
| >
| > 1) When the Quantian iso is on a Ext3 filesystem, no problems at all:
| > openMosix starts and the two KNOPPIX* images are mounted (both with
| > Dirk's unionfs.o and version 1.0.14).
| >
| > 2) When the Quantian iso in on a ReiserFS filesystem, the two images
| > are mounted, but openMosix does not start. However, after a
| >
| > /etc/init.d/openmosix restart
| >
| > openMosix is up. From a df
| >
| > root at 0[init.d]# df
| > Filesystem           1K-blocks      Used Available Use% Mounted on
| > /dev/root                 9677        30      9147   1% /
| > /cdrom2.loop/Q*.iso    2506788   2506788         0 100% /cdrom/
| > /dev/cloop             5678206   5678206         0 100% /KNOPPIX
| > /ramdisk               1633392      5556   1627836   1% /ramdisk
| > /UNIONFS               8382300   6754464   1627836  81% /UNIONFS
| > /cdrom2.loop/Q*.iso    2506788   2506788         0 100% /cdrom/
| > /dev/cloop             5678206   5678206         0 100% /KNOPPIX
| > /dev/cloop2            1070706   1070706         0 100% /KNOPPIX2
| > mfs_mnt                9999999 -18446744073619551616   9999999 101%
| > /UNIONFS/mfs
| >
| > the last row seems strange to me.
| 
| That whole df output looks kind of odd to me - several mount points are 
| listed twice.  But maybe that's normal when booting from a hard drive 
| or maybe I just don't understand UNIONFS.

It doesn't look that way under kernel 2.6 either when unionfs works normally.
The equivalent would be something like this (judging from what I see under
vmplayer; I'd have to reboot otherwise)

root at 0[init.d]# df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/root                 9677        30      9147   1% /
/dev/hdc               2506788   2506788         0 100% /cdrom/
/ramdisk               1633392      5556   1627836   1% /ramdisk
/UNIONFS               8382300   6754464   1627836  81% /UNIONFS
/dev/cloop             5678206   5678206         0 100% /KNOPPIX
/dev/cloop2            1070706   1070706         0 100% /KNOPPIX2

So so gar Marco is still the only one who claims that 2.4, oM and unionfs can
play along. We'd really need two (or more) machines in a small cluster to
share processes to be sure.
 
| I didn't get a chance to run any tests last night - maybe tonight.  I'll 
| check the df output then, as well.

Sounds good.

Regards, Dirk

-- 
Hell, there are no rules here - we're trying to accomplish something. 
                                                  -- Thomas A. Edison