Re: [Xen-devel] Re: xl vs. xm, possible bug in xl

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Thu, 8 Sep 2011, Sven KÃhler wrote:
> Am 08.09.2011 19:07, schrieb Konrad Rzeszutek Wilk:
> > On Thu, Sep 08, 2011 at 06:42:12PM +0200, Sven KÃhler wrote:
> >> Hi,
> >>
> >> xl is supposed to superseed xm, is this correct? How mature is xl,
> >> actually? I'm asking, because the maintainers of the gentoo's xen
> >> packages are migrating the init.d-scripts from xm to xl, but xl is
> >> causing a lot of trouble.
> >>
> >> Well, xl basically fails to start domains on my system.
> >>> # xl create /etc/xen/xen-sk1
> >>> Parsing config file /etc/xen/xen-sk1
> >>> libxl: error: libxl.c:2145:libxl_set_memory_target new target 0 for dom0 
> >>> is below the minimum threshold
> >>> libxl: error: libxl.c:2145:libxl_set_memory_target new target 0 for dom0 
> >>> is below the minimum threshold
> >>> libxl: error: libxl.c:2145:libxl_set_memory_target new target 0 for dom0 
> >>> is below the minimum threshold
> >>> failed to free memory for the domain
> >>
> >> Consider, that autobaloon=1 in xl.conf.
> >> With the autobaloon=0 the errors change to
> >>
> >>> # xl create /etc/xen/xen-sk1
> >>> Parsing config file /etc/xen/xen-sk1
> >>> libxl: error: libxl_device.c:476:libxl__wait_for_device_model Device 
> >>> Model not ready
> >>> xl: fatal error: libxl_create.c:535, rc=-1: 
> >>> libxl__confirm_device_model_startup
> >>
> >>
> >> Note, that I use dom0_mem=512M in grub.conf. Also, xm top states, that
> >> there are 2139432k free memory. Considering the first issue, it seems
> >> like xl is trying to baloon memory away from dom0, which fails - which
> >> seems obvious wrong considering that I use dom0_mem. CONFIG_XEN_BALLOON
> >> is enabled for dom0
> > 
> > Yeah, there is a bug there (in Linux kernel) that just got integrated in 
> > 3.1-rc5.
> > Will show up in 3.0.5.
> 
> A bug will show up in 3.0.5/3.1-rc5 or the fix for it?
> 
> Also, you seem to be replying to the first problem, the on about memory.
> 
> Any clue, that the second problem is about?
> > # xl create /etc/xen/xen-sk1
> > Parsing config file /etc/xen/xen-sk1
> > libxl: error: libxl_device.c:476:libxl__wait_for_device_model Device Model 
> > not ready
> > xl: fatal error: libxl_create.c:535, rc=-1: 
> > libxl__confirm_device_model_startup

That means that qemu failed to start. Could you please cat
/var/log/xen/qemu-dm-domainname.log?

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