Re: [Libvir] Bug in the virDomainGetInfo() API of libvirt 0.1.9 with Xen 3.0.3

[Philippe Berthault <Philippe Berthault Bull net>]

Daniel P. Berrange a écrit :
> On Fri, Jan 12, 2007 at 11:47:16AM +0100, Philippe Berthault wrote:
>   
> > The maxMem field of the virDomainInfo structure is given in bytes 
> > instead of Kbytes when the domain is 0 (Domain-0). With others domains, 
> > the value of maxMem is correct.
> >
> > Exemple with virsh:
> >  On a system with 4 GB memory, virsh reports:
> >  # virsh dominfo 0
> >  ...
> >  Max memory: 4294967292 kB
> >
> > With the same libvirt version 0.1.9 but with an older Xen (not 3.0.3), 
> > the maxMem value of Domain-0 is correct.
> >     
>
> This sounds like a bug in Xen, rather than a bug in libvirt - we don't
> have any special handling for Domain-0 - we're just passing back through
> whatever data we get from Xen.
>
> Dan.
>   
This problem seems to be caused by a missing initialization (in Xen or 
libvirt ? to be determined) because after setting the system memory size 
by using the "xm mem-max" command on Domain-0, the Max memory value 
returned by virsh is correct and reflect the value passed to the xm command.

This problem of incoherent maxMem value on Domain-0 has been detected 
after a system reboot.