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

[Sven Köhler <sven.koehler@xxxxxxxxx>]

Am 08.09.2011 19:07, schrieb Konrad Rzeszutek Wilk:
> On Thu, Sep 08, 2011 at 06:42:12PM +0200, Sven Köhler 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


>> dom0:
>> vanilla 3.0.0 with vga patch
> 
> You could upgrade to 3.0.4 and then you get the VGA patch for free
> (and some bug-fixes too).

Done. No improvement.


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