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Re: [Xen-devel] xen-4.3 port to illumos based platform

Hi Ian,

On Feb 3, 2014, at 2:08 PM, Ian Campbell wrote:

> On Fri, 2014-01-31 at 20:48 +0400, Igor Kozhukhov wrote:
>> Hi All,
>> i try to load PV guest by:
>> virt-install --debug --paravirt --name cos6x64 --ram 800 --network bridge  
>> --disk path=/dev/zvol/dsk/rpool/xen/cos01,driver=phy --location 
>> http://merlin.fit.vutbr.cz/mirrors/centos/6.5/os/x86_64/ --nographics
>> could you please help me try to debug issues with PV creation:
>> POST operation failed: xend_post: error from xen daemon: (xend.err
>> "Error creating domain: (1, 'Internal error', 'panic:
>> xc_dom_boot.c:197: xc_dom_boot_domU_map: failed to mmap domU pages
>> 0x1000+0x1040 [mmap, errno=6 (No such device or address)]')")
>> i want try to find what i have to check/update: Xen sources OR illumos 
>> sources.
> The error message comes from xc_dom_boot.c which is part of Xen. A call
> to xc_map_foreign_ranges has failed. This is abstracted out for
> different platforms via the xenctrlosdep.h interface.
> Are you using xc_solaris.c or have you created a new xc_illumos.c? It is
> a pretty good bet that xc_solaris has bitrotten over the years. In
> either case my gut feeling is that the issue is either in that code or
> on the kernel side in the "privcmd" driver which it calls into.

i'm using xc_solaris.c - because illumos based on solaris and has open API.
for now - i have found and fixed my problems: i'm able to load PV guests: dilos 
PV on dilos-xen-4.3-dom0, Linux ContOS 6.4 and Debian 7.0 64bits.
I'll send info later with new ISO and instruction for testing.
'xl' now work well.
i'll work on provide my changes to Xen upstream.

> BTW -- I'd strongly recommend that you switch to using the "xl"
> toolstack -- xend is obsolete and deprecated so using it for a new port
> is not recommended, it will obscure some of the error messages etc.
> For the initial debugging phases I would also suggest to avoid higher
> level tools such as libvirt (again because they can obscure some of the
> lower level debugging) and to use the "xl create" interface directly. A
> simple config file would be something like:
>       name = "test"
>       kernel = "/path/to/vmlinuz"
>       extra = "console=hvc"
> Where:
>        wget -O /path/to/vmlinuz 
> http://merlin.fit.vutbr.cz/mirrors/centos/6.5/os/x86_64/isolinux/vmlinuz
> is the kernel to use.
> Launch with 
>       xl -vvv create /path/to/cfg
> and you'll get plenty of debug output.
> Ian.

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