Re: kvm-84 and guests with more than 3536 MB Ram?

[Ryan Harper <ryanh@us.ibm.com>]

* Lukas Kolbe <l-lists@einfachkaffee.de> [2009-03-24 14:32]:
> Am Dienstag, den 24.03.2009, 17:04 +0100 schrieb Tomasz Chmielewski:
> > Anthony Liguori schrieb:
> > > Lukas Kolbe wrote:
> > >> On Di, 2009-03-24 at 14:59 +0200, Avi Kivity wrote:
> > >>  
> > >>> Lukas Kolbe wrote:
> > >>>    
> > >>>> Hi!
> > >>>>
> > >>>> This is my first post here so please bear with me; we have a Debian
> > >>>> Lenny system with kernel 2.6.28 and kvm-84, and can't start a guest 
> > >>>> with
> > >>>> more than 3536 MB Ram. With kvm-72 (the version lenny released with) we
> > >>>> can use all 7GB that is intended for that guest.
> > 
> > (...)
> > 
> > >> qemu: loading initrd (0x781b93 bytes) at 0x000000007f87e000
> > >> create_userspace_phys_mem: Invalid argument
> > >> kvm_cpu_register_physical_memory: failed
> > >>
> > >> And back to the console. When I try the same with 3584MB, I can boot
> > >> into the machine flawlessly.
> > >>
> > >> Sorry for getting the numbers wrong in the first mail - the actual
> > >> problem starts at 3585MB Ram for the guest.
> > >>
> > >> If you can't reproduce it with yout 2.6.28 and kvm-84, I should possibly
> > >> take this to the debian bugtracker ...
> > >>   
> > > 
> > > kvm-72 is pretty old.  It used to be that we used phys_ram_base for 
> > > loading kernel/initrds which would break when using > 3.5GB of memory.  
> > > I wouldn't be surprised if that fix happened post kvm-72.
> > 
> > Doesn't he say that it did work for him with kvm-72, but does not with 
> > kvm-84?
> 
> Exactly that :)
> kvm-72 works like a charm, with the noted exception that it crashes
> every now and than on our system (during heavy load), which was the
> reason we tried 084 in the first place.

running kvm-84 with -m 8192 -- passes memtest on ubuntu 8.10 x86_64
server cd.  Maybe wrong bios?  From kvm-84 make install, I have:

% md5sum /usr/local/share/qemu/bios.bin 
470d43e4838be608a2447b23a9f83d90  /usr/local/share/qemu/bios.bin


-- 
Ryan Harper
Software Engineer; Linux Technology Center
IBM Corp., Austin, Tx
ryanh@us.ibm.com