Xen devel - May 2004 - Create Dom1, ''only root can do that'' ?

hi there,

I''m using xeno1.2, and wanna create dom1, but it report this problems:

[1] modprobe: modprobe: Can''t locate module net-pf-11
[1] modprobe: modprobe: Can''t locate module net-pf-4
[1] modprobe: modprobe: Can''t locate module net-pf-5
[1] modprobe: modprobe: Can''t locate module net-pf-18
[1] modprobe: modprobe: Can''t locate module net-pf-9
[1] Warning: cannot open /proc/net/dev (No such file or directory). Limited
output.
[1] Mounting proc filesystem:  mount: only root can do that
[1] [FAILED]
[1] Configuring kernel parameters:  Error: /proc must be mounted
[1]   To mount /proc at boot you need an /etc/fstab line like:
[1]       /proc   /proc   proc    defaults
[1]   In the meantime, mount /proc /proc -t proc
[1] [FAILED]
[1] Setting clock  (localtime): Wed May  5 08:46:54 UTC 2004 [  OK  ]
[1] Setting hostname xendemo-146.localdomain:  [  OK  ]
[1] awk: cmd. line:2: fatal: cannot open file `/proc/mounts'' for
reading (No such file or directory)
[1] Remounting root filesystem in read-write mode:  mount: only root can do that
[1] [FAILED]
[1] mount: only root can do that
[1] mount: only root can do that
[1] Mounting local filesystems:  mount: only root can do that
[1] [FAILED]
[1] Turning on process accounting [  OK  ]
[1] /etc/rc.sysinit: line 661: /var/run/utmp: Read-only file system
[1] touch: creating `/var/log/wtmp'': Read-only file system
[1] chgrp: failed to get attributes of `/var/run/utmp'': No such file or
directory
[1] chmod: failed to get attributes of `/var/run/utmp'': No such file or
directory
[1] chmod: changing permissions of `/var/log/wtmp'': Read-only file
system
[1] /etc/rc.sysinit: line 666: /var/run/utmpx: Read-only file system
[1] touch: creating `/var/log/wtmpx'': Read-only file system
[1] chgrp: failed to get attributes of `/var/run/utmpx'': No such file
or directory
[1] chmod: failed to get attributes of `/var/run/utmpx'': No such file
or directory
[1] chmod: changing permissions of `/var/log/wtmpx'': Read-only file
system
[1] /etc/rc.sysinit: line 712: /var/log/dmesg: Read-only file system
[1] mv: cannot move `/var/log/ksyms.0'' to `/var/log/ksyms.1'':
Read-only file system
[1] /etc/rc.sysinit: line 730: /var/log/ksyms.0: Read-only file system
[1] touch: creating `/.autofsck'': Read-only file system
[1] mount: only root can do that
[1] pidof[145]: mount returned non-zero exit status
[1] pidof[145]: /proc not mounted, failed to mount.

And then it stuck there, actually I succeeded to create new dom in another
machine, so I don''t know wha''t the problem. Any help is highly
appreciated.

Thanks,
Yan

> 
> I''m using xeno1.2, and wanna create dom1, but it report this
problems:
> 
> [1] modprobe: modprobe: Can''t locate module net-pf-11
> [1] modprobe: modprobe: Can''t locate module net-pf-4
> [1] modprobe: modprobe: Can''t locate module net-pf-5
> [1] modprobe: modprobe: Can''t locate module net-pf-18
> [1] modprobe: modprobe: Can''t locate module net-pf-9
These messages are probably harmless -- you''re version of
xenolinux just doesn''t have these modules built and installed. If
you want them, follow the normal Linux config and build procedures.
> [1] Warning: cannot open /proc/net/dev (No such file or directory). Limited
output.
> [1] Mounting proc filesystem:  mount: only root can do that
> [1] [FAILED]
> [1] Configuring kernel parameters:  Error: /proc must be mounted
> [1]   To mount /proc at boot you need an /etc/fstab line like:
> [1]       /proc   /proc   proc    defaults
> [1]   In the meantime, mount /proc /proc -t proc
I''ve never seen this before. It''s almost certainly nothing to
do
with Xen. If you put a standard Linux kernel down on the same
file system I''ll bet it will do the same.

Have you checked that your /etc/fstab does indeed contain the
/proc mount line?  Does the mountpoint directory exist?

Best,
Ian



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hi there,

I''m wondering if the guest OS can handle most of the system calls by
itself?
Only for these hypercalls defined in hypervisor.h, guest OS needs to go down
to Xen. For all other system calls, xeno handles in its own doamin well.

Is this understanding right? If not, how are the system calls handled?

Thanks,
Yan


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