Re: Error restoring DomU when using GPLPV

[ANNIE LI <annie.li@oracle.com>]

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Hi

>> It seems that a 
>> restored vm lost those pages ballooned down. For migration, destination
>> does not have those pages which ballooned down on source.
>>     
>
> Right, that's the correct behaviour isn't it? Pages freed on source VM do
> not magically reappear on destination VM?
>
>   
Yes,  so this method can not fix this problem.
>> But if i balloon down those pages every time(not driver first load),  i
>> tested save/restore/migration for several times, and all work fine.  But
>> the domu will waste lots of memory in this situation.
>>     
>
> Yes, that's weird. Do you know what condition causes guest memory allocation
> failure on xc_domain_restore? Is it due to hitting the guest maxmem limit in
> Xen? If so, is maxmem the same value across multiple iterations of
> save/restore or migration?
>   
Sorry, i have no idea about it. Maybe I need to print more log in 
for(;;) in xc_domain_restore to see what is the difference between 
without and with balooning down pages.

Thanks
Annie.


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