Re: [uml-user] problems in ubd0 load

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Hello Cone

The cowfs is the new COW file for the existing share
root_fs. I think the COW file will be created by the
driver if it doesn't exist.
SO after I run the UML and which fails:
> wc cowfs
0       0       0 cowfs

ls -l
-rw-r--r--    1 gshankar people          0 Nov  6
09:31 cowfs

AND for root_fs

>wc root_fs
 359513 1915884 104857600 root_fs

gshankar@moretti:~/src/uml/manet/linux-2.4.22$ ls -l
root_fs
-rwxrwxrwx    1 gshankar people   104857600 Nov  6
09:23 root_fs*

The file system works fine with the 2.4.18 kernel. But
when I built for the 2.4.22 kernel I'm having this
problems. I don't know What mistake I'm doing.

Thanks
Gowri

--- "J. Cone" <jc...@es...> wrote:
> Hello Gowri,
> 
> I'm really fairly ignorant, but I'll have another go
> 
> mconsole (version 2) initialized on
> /u/gshankar/.uml/MlJjKZ/mconsole
>  >    Failed to lock 'cowfs', err = 13
>  >    unable to open cowfs for validation
> UML Audio Relay (host dsp = /dev/sound/dsp, host
> 
> What result do you get, if you
>    wc cowfs
>    touch cowfs
>    ls -l cowfs
> 
> If any of these fail, then those errors probably
> need to be resolved before 
> uml can be happy.
> None of these command lines explicitly tests file
> locking, or writing, but 
> those things need to work as well.
> 
> Regards,
> James.
> 
> At 07:35 5/11/2003 -0800, gowri shankar wrote:
> >Hi,
> >I tried giving root=/dev/ubd/0 in the command line
> >still I'm getting the same error message. :-(
> >Or is there somewhere else I need to set this
> option.
> >Sorry for this naive question.
> >Thanks
> >Gowri
> >
> >
> >--- "J. Cone" <jc...@es...> wrote:
> > > When I changed to root=/dev/ubd/0  (in kernel
> > > 2.5-test5) I stopped getting
> > > this error message.  I guess /dev has changed.
> > >
> > > At 15:59 3/11/2003 -0800, gowri shankar wrote:
> > > >The UML doesn't load and gives the following
> > > problem
> > > >'VFS: Cannot open root device "ubd0" or 62:00'
> > > >
> > > >I was working with the 2.4.18um which didn't
> give
> > > any
> > > >problems. But once I upgraded the kernel to
> 2.4.22
> > > I
> > > >cannot load the UML :-( I tried searching the
> > > mailing
> > > >list for the problem But I could not solve it
> > > >
> > > >I execute linux through
> > > >./linux ubd0=cowfs,root_fs mode=tt eth0=daemon
> > > >
> > > >Any inputs in this will be very helpful. I
> don't
> > > know
> > > >what mistake I'm making.
> > > >
> > > >This is the Output:
> > > >-------------------
> > > >
> > > >tracing thread pid = 23097
> > > >Linux version 2.4.22-5um (gshankar@moretti)
> (gcc
> > > >version 2.95.4 20011002 (Debian prerelease)) #8
> Mon
> > > >Nov 3 16:47:47 CST 2003
> > > >On node 0 totalpages: 8192
> > > >zone(0): 8192 pages.
> > > >zone(1): 0 pages.
> > > >zone(2): 0 pages.
> > > >Kernel command line: ubd0=cowfs,root_fs mode=tt
> > > >eth0=daemon root=/dev/ubd0
> > > >Calibrating delay loop... 758.46 BogoMIPS
> > > >Memory: 29132k available
> > > >Dentry cache hash table entries: 4096 (order:
> 3,
> > > 32768
> > > >bytes)
> > > >Inode cache hash table entries: 2048 (order: 2,
> > > 16384
> > > >bytes)
> > > >Mount cache hash table entries: 512 (order: 0,
> 4096
> > > >bytes)
> > > >Buffer cache hash table entries: 1024 (order:
> 0,
> > > 4096
> > > >bytes)
> > > >Page-cache hash table entries: 8192 (order: 3,
> > > 32768
> > > >bytes)
> > > >Checking for host processor cmov support...Yes
> > > >Checking for host processor xmm support...No
> > > >Checking that ptrace can change system call
> > > >numbers...OK
> > > >Checking that host ptys support output
> SIGIO...Yes
> > > >Checking that host ptys support SIGIO on
> > > close...No,
> > > >enabling workaround
> > > >POSIX conformance testing by UNIFIX
> > > >Linux NET4.0 for Linux 2.4
> > > >Based upon Swansea University Computer Society
> > > >NET3.039
> > > >Initializing RT netlink socket
> > > >Starting kswapd
> > > >devfs: v1.12c (20020818) Richard Gooch
> > > >(rg...@at...)
> > > >devfs: boot_options: 0x1
> > > >pty: 256 Unix98 ptys configured
> > > >SLIP: version 0.8.4-NET3.019-NEWTTY (dynamic
> > > channels,
> > > >max=256).
> > > >loop: loaded (max 8 devices)
> > > >PPP generic driver version 2.4.2
> > > >Universal TUN/TAP device driver 1.5
> (C)1999-2002
> > > Maxim
> > > >Krasnyansky
> > > >SCSI subsystem driver Revision: 1.00
> > > >blkmtd: error: missing `device' name
> > > >
> > > >Initializing software serial port version 1
> > > >Netdevice 0 : daemon backend (uml_switch
> version 3)
> > > -
> > > >unix:/tmp/uml.ctl
> > > >mconsole (version 2) initialized on
> > > >/u/gshankar/.uml/MlJjKZ/mconsole
> > > >Failed to lock 'cowfs', err = 13
> > > >unable to open cowfs for validation
> > > >UML Audio Relay (host dsp = /dev/sound/dsp,
> host
> > > mixer
> > > >= /dev/sound/mixer)
> > > >Initializing stdio console driver
> > > >NET4: Linux TCP/IP 1.0 for NET4.0
> > > >IP Protocols: ICMP, UDP, TCP
> > > >IP: routing cache hash table of 512 buckets,
> > > 4Kbytes
> > > >TCP: Hash tables configured (established 2048
> bind
> > > >2048)
> > > >NET4: Unix domain sockets 1.0/SMP for Linux
> NET4.0.
> > > >VFS: Cannot open root device "ubd0" or 62:00
> > > >Please append a correct "root=" boot option
> > > >Kernel panic: VFS: Unable to mount root fs on
> 62:00
> > > >
> > > >Thanks
> > > >Gowri
> > > >
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