Re: [Xen-users] SWAP on domUs is not mounted.

[kanour-xen <xen@xxxxxxxxxx>]

Tom Brown wrote:
> On Mon, 26 Feb 2007, kanour-xen wrote:
>
> > Tom Brown wrote:
> > > >  - domU disk config:
> > > >  disk=['phy:/dev/vm_vg/monit1_root,hda1,w',
> > > >       'phy:/dev/vm_vg/monit1_swap,hda2,w']
> > >
> > >  you've exported hda1 and hda2
> > >
> > > >  - !!!! domU does not have /dev/hda1 /dev/hda2 in /dev directory
> > >
> > >
> > > >  Some other commands on domU (monit1):
> > > >  /etc/fstab
> > > >  /dev/sda1       /       ext3    defaults        1       2
> > > >  /dev/sda2       none    swap    sw      0       0
> > >
> > >  ... and told it to look for sda1 and sda2
> > >
> > >  (sda does not match hda)
> > >
> > >  pick one, I don't think it matters which.
> > >
> > >  try swapon /dev/hda2 and see if _that_ works :)
> > >
> > >  then again it may fail due to the missing /dev/hda2 file.
> > >
> > >  -Tom
> > Sorry, That was just typo. I have both /dev/hda.
> >
> > I was trying hda and even sda. Both do not work. It is strength that  
> > domUs do not have it in /dev.
> > Thanks for another advice.
> ok, what do you see in /sys/block in the domU?
>
> e.g.
>
> [root@pd3 ~]# ls /sys/block/
> loop0/  loop3/  loop6/  ram1/   ram12/  ram15/  ram4/  ram7/  sda1/
> loop1/  loop4/  loop7/  ram10/  ram13/  ram2/   ram5/  ram8/  sdb1/
> loop2/  loop5/  ram0/   ram11/  ram14/  ram3/   ram6/  ram9/  sdc1/
>
> and in dom0 I have
>
> [root@xen5 ~]# xm list | grep pallad
> palladium                          8     2048     2 ------ 5410190.9
>
> [root@xen5 ~]# xm block-list 8
> (2049 ((virtual-device 2049) (backend-id 0) (state 4) (backend 
> /local/domain/0/backend/vbd/8/2049) (ring-ref 8) (event-channel 9)))
> (2065 ((virtual-device 2065) (backend-id 0) (state 4) (backend 
> /local/domain/0/backend/vbd/8/2065) (ring-ref 9) (event-channel 10)))
> (2081 ((virtual-device 2081) (backend-id 0) (state 4) (backend 
> /local/domain/0/backend/vbd/8/2081) (ring-ref 10) (event-channel 11)))
> it may look a _lot_ different on your box, this is a xen 3.0.0 box :( 
> and it's different on my 3.0.3 boxes
> but the /sys/block output should show whether or not your domU has the 
> extra device, and the block-list should show whether or not your dom0 
> is trying to export the extra device.
> -Tom
Hi Tom. Here is what you wanted.
domU
monit1:~# ll /sys/block/
total 0
drwxr-xr-x 21 root root 0 2007-02-26 06:55 .
drwxr-xr-x 11 root root 0 2007-02-26 06:55 ..
drwxr-xr-x  3 root root 0 2007-02-26 06:55 hda1
drwxr-xr-x  3 root root 0 2007-02-26 06:55 hda2
drwxr-xr-x  3 root root 0 2007-02-26 06:55 md0
drwxr-xr-x  2 root root 0 2007-02-26 06:55 ram0
drwxr-xr-x  2 root root 0 2007-02-26 06:55 ram1
drwxr-xr-x  2 root root 0 2007-02-26 06:55 ram10
drwxr-xr-x  2 root root 0 2007-02-26 06:55 ram11
drwxr-xr-x  2 root root 0 2007-02-26 06:55 ram12
drwxr-xr-x  2 root root 0 2007-02-26 06:55 ram13
drwxr-xr-x  2 root root 0 2007-02-26 06:55 ram14
drwxr-xr-x  2 root root 0 2007-02-26 06:55 ram15
drwxr-xr-x  2 root root 0 2007-02-26 06:55 ram2
drwxr-xr-x  2 root root 0 2007-02-26 06:55 ram3
drwxr-xr-x  2 root root 0 2007-02-26 06:55 ram4
drwxr-xr-x  2 root root 0 2007-02-26 06:55 ram5
drwxr-xr-x  2 root root 0 2007-02-26 06:55 ram6
drwxr-xr-x  2 root root 0 2007-02-26 06:55 ram7
drwxr-xr-x  2 root root 0 2007-02-26 06:55 ram8
drwxr-xr-x  2 root root 0 2007-02-26 06:55 ram9

dom0
dom0:~# xm list | grep  monit1
monit1                                    18   256     1     -b----      4.4

dom0:~# xm block-list monit1
Vdev  BE handle state evt-ch ring-ref BE-path
769    0    0     4      6      8     /local/domain/0/backend/vbd/18/769
770    0    0     4      7      9     /local/domain/0/backend/vbd/18/770


What do you think? Is there anything else what I can check?
I installed xen 3.0.4_1
I have no udev installed on both dom0 and domU (on my running 2nd 
machine xen 3.0.1 on i386 I have not udev neither).
Jiri

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