RE: [Xen-users] xm save/restore failing; ideas ?

["Petersson, Mats" <Mats.Petersson@xxxxxxx>]

> -----Original Message-----
> From: Harsh Modawel [mailto:harsh.modawel@xxxxxxxxxx] 
> Sent: 23 May 2007 11:27
> To: Petersson, Mats
> Cc: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-users] xm save/restore failing; ideas ?
> 
> Thanks it helped but am not sure of the reason.
> 
> The log contains -
> [2007-05-23 15:45:55 xend.XendDomainInfo 12700] DEBUG 
> (XendDomainInfo:203) XendDomainInfo.restore(['domain', 
> ['domid', '10'], ['on_crash', 'restart'], ['memory', '128'], 
> ['uuid', 'f9e76c0d-1564-5b1d-44c4-bc67619b30ea'], 
> ['bootloader_args'], ['name', 'debian_3.1'], ['maxmem', 
> '128'], ['cpus', ['0']], ['on_reboot', 'restart'], 
> ['on_poweroff', 'destroy'], ['localtime', '0'], ['vcpus', 
> '1'], ['bootloader'], ['shadow_memory', '0'], ['vcpu_avail', 
> '1'], ['cpu_weight', '256'], ['cpu_cap', '0'], ['features'], 
> ['on_xend_start', 'ignore'], ['on_xend_stop', 'ignore'], 
> ['start_time', '1179915283.55'], ['cpu_time', '7.031623069'], 
> ['online_vcpus', '1'], ['cpus', ['0']], ['cpus', ['0']], 
> ['cpus', ['0']], ['cpus', ['0']], ['cpus', ['0']], ['cpus', 
> ['0']], ['cpus', ['0']], ['cpus', ['0']], ['cpus', ['0']], 
> ['cpus', ['0']], ['cpus', ['0']], ['cpus', ['0']], ['cpus', 
> ['0']], ['cpus', ['0']], ['cpus', ['0']], ['cpus', ['0']], 
> ['cpus', ['0']], ['cpus', ['0']],

Hmm - I don't think there should be that many "cpus" in there... But I
don't really know what it's supposed to look like for non-HVM domains,
as I have been doing all my save/restore on HVM domains. 

> 
> The error is -
> [2007-05-23 13:39:59 xend 11993] ERROR (XendDomain:1001) 
> Restore failed
> ..................
>     self._sxp_to_xapi(sxp_obj)
>   File 
> "/usr/src/redhat/SOURCES/xen-3.0.4-testing-0603ab5b0ede.bb101e
> 77d4a3/dist/install/usr/lib/python/xen/xend/XendConfig.py", 
> line 590, in _sxp_to_xapi
>     cfg = self._parse_sxp(sxp_cfg)
>   File 
> "/usr/src/redhat/SOURCES/xen-3.0.4-testing-0603ab5b0ede.bb101e
> 77d4a3/dist/install/usr/lib/python/xen/xend/XendConfig.py", 
> line 556, in _parse_sxp
>     for c in cfg['cpus'].split(','):
> AttributeError: 'list' object has no attribute 'split'

That is also a bit strange. 

I would recommend that you upgrade to 3.1, as that has a much more
complete set of save/restor functionality. 

--
Mats
> 
> 
> Hence, I commented out the following from the DomU's 
> configuration file -
> #cpus = "0"
> #vcpus = 2
> 
> Now I can do save/restore (I have 1 cpu on my machine right now)
> 
> Regards,
> -harsh
> 
> Petersson, Mats wrote:
> 
> 
>        
>       
>         
> 
>               -----Original Message-----
>               From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
>               [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] 
> On Behalf Of 
>               Harsh Modawel
>               Sent: 23 May 2007 10:29
>               To: xen-users@xxxxxxxxxxxxxxxxxxx
>               Subject: [Xen-users] xm save/restore failing; ideas ?
>               
>               Hi,
>                   I had save/restore working earlier and am 
> not sure what 
>               is causing 
>               it to fail now -
>               
>               =====================================
>               [root@localhost ~]# xm list
>               Name                                      ID   
> Mem VCPUs      State   
>               Time(s)
>               Domain-0                                   0   
> 257     1     
>               r-----     
>               74.3
>               debian_3.1                                 9   
> 128     2     
>               -b----     
>               21.1
>               
>               [root@localhost ~]# xm save debian_3.1 /tmp/t
>               
>               [root@localhost ~]# ls -l /tmp/t
>               -rwxr-xr-x  1 root root 134368760 May 23 13:39 /tmp/t
>               
>               [root@localhost ~]# date
>               Wed May 23 13:39:45 IST 2007
>               
>               [root@localhost ~]# xm list
>               Name                                      ID   
> Mem VCPUs      State   
>               Time(s)
>               Domain-0                                   0   
> 257     1     
>               r-----     
>               76.8
>               
>               [root@localhost ~]# xm restore /tmp/t
>               Error: Restore failed
>               Usage: xm restore <CheckpointFile> [-p]
>               
>               Restore a domain from a saved state.
>                -p, --paused                   Do not unpause 
> domain after 
>               restoring it 
>               =====================================
>               
>               Any thoughts/sugegestions ?
>                   
> 
>       
>       Have a look at /var/log/xen/xend.log, and see if it's 
> got something
>       useful in there. Most likely, the save-file is messed 
> up somehow. [It
>       looks about the right size, a few meg above 128M, but 
> it doesn't mean
>       that there isn't something wrong in there...] 
>       
>       --
>       Mats
>         
> 
>               Regards,
>               -harsh
>               
>               
>               
>               
>               
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>               
>               
>               
>                   
> 
>       
>       
>       
>         
> 
> 



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