Re: [Xen-devel] HVM pvops failures (one more qemu-dm.strace obtained)

[Boris Derzhavets <bderzhavets@xxxxxxxxx>]

  1.You can install a lot of PV DomUs i guess via two pygrub profiles,
first one to install DomU, second one to load DomU, for guests having
distros on DVDs with xen-inified or pv_ops (DomU) enabled kernel.
It works fine, through my experience. Details here:-

http://lxer.com/module/newswire/view/112300/index.html

F10 has been tested.

 2. For Ubuntu( or Debian)  DomUs  "debootstrap port"  to your Xen Unstable
Dom0 will allow straight forward installations. I prefer trick with HVM
image prebuilt for corresponding PV DomU pygrub's profile at Xen 3.3.X Dom0s. However, now i  learned debootstrap (debian tool) and liked it very much ;). Details here:-

http://lxer.com/module/newswire/view/114465/index.html

Ubuntu Intrepid Server (64 bit) has been tested

 3. You can try to install OpenSolaris 2008/11 or Solaris Nevada
PV DomU on ZFS. That's really tuff. Pygrub won't help you to
read Sun's the most recent ZFS images.

Details here:-
http://www.neuhalfen.name/drupal/node/3


--- On Wed, 2/25/09, Andrew Lyon <andrew.lyon@xxxxxxxxx> wrote:

From: Andrew Lyon <andrew.lyon@xxxxxxxxx>
Subject: Re: [Xen-devel] HVM pvops failures (one more qemu-dm.strace obtained)
To: "Boris Derzhavets" <bderzhavets@xxxxxxxxx>
Cc: "Jeremy Fitzhardinge" <jeremy@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "Ian Jackson" <Ian.Jackson@xxxxxxxxxxxxx>, "Ian Campbell" <Ian.Campbell@xxxxxxxxxx>
Date: Wednesday, February 25, 2009, 9:28 AM

On Tue, Feb 24, 2009 at 11:38 AM, Boris Derzhavets
<bderzhavets@xxxxxxxxx> wrote:
> I fixed error in hvm profile and got a similar qemu-dm.strace (
> /usr/lib64/.../qemu-dm).
>
> --- On Mon, 2/23/09, Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote:
>
> From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
> Subject: Re: [Xen-devel] HVM pvops failures
> To: "Ian Jackson" <Ian.Jackson@xxxxxxxxxxxxx>
> Cc: "Andrew Lyon"
 <andrew.lyon@xxxxxxxxx>,
"xen-devel@xxxxxxxxxxxxxxxxxxx"
> <xen-devel@xxxxxxxxxxxxxxxxxxx>, "Ian Campbell"
<Ian.Campbell@xxxxxxxxxx>
> Date: Monday, February 23, 2009, 7:12 PM
>
> Ian Jackson wrote:
>> Andrew Lyon writes ("Re: [Xen-devel] HVM guest question (was Re:
> [PATCH] ioemu: Cleanup the code of PCI passthrough.)"):
>>
>>> On Mon, Feb 23, 2009 at 2:53 PM, Ian
>  Jackson
> <Ian.Jackson@xxxxxxxxxxxxx> wrote:
>>>
>>>> These messages are not very surprising.  Is it working ?
>>>>
>>> No, when try to start HVM on Xen unstable with pv_ops kernel I get
> this error:
>>>
>>
>> Ah.  This is rather odd.  Normally I would hope that xend would report
>> an exit status.  (I haven't tried pvops with qemu.)
>>
>>
> Hm, I'm getting:
>
 [2009-02-23 15:26:18 4380] WARNING (image:482) domain win7: device model
> failure: pid 5409: died due to signal 7; see /var/log/xen/qemu-dm-win7.log
>
> Hm, signal 7 - SIGBUS.  I wonder if
>
> Using stub domains doesn't work either.
>
>> I would suggest running qemu-dm under strace.  This can be done easily
>> enough with a simple wrapper script, something like:
>>   #!/bin/sh
>>   set -e
>>   exec strace -vvs500 -f -o /root/qemu-dm.strace \
>>
>  /usr/lib/xen/bin/qemu-dm "$@"
>> and then give the name of the script as device_model in your config
file.


Is there anything more I can do to help debug this problem? I am eager
to do more testing with pv_ops and I have time to do it at the moment,
but hvm support is currently broken so there is little I can do with
my test box.

Thx
Andy

>>
> I
 see:
>
> ...
> 5079  ioctl(10, EVIOCGKEYCODE, 0x7fffdfd52b70) = 0
> 5079  clock_gettime(CLOCK_MONOTONIC, {1324, 539747423}) = 0
> 5079  clock_gettime(CLOCK_MONOTONIC, {1324, 539837298}) = 0
> 5079  select(14, [3 6 10 11 13], [], [], {0, 10000}) = 1 (in [10], left
{0,
> 9995})
> 5079  read(10, "\36\0\0\0"..., 4)       = 4
> 5079  write(10, "\36\0\0\0"..., 4)      = 4
> 5079  ioctl(10, EVIOCGKEYCODE, 0x7fffdfd52b70) = 0
> 5079  clock_gettime(CLOCK_MONOTONIC, {1324, 540495964}) = 0
> 5079  clock_gettime(CLOCK_MONOTONIC, {1324, 540591278}) = 0
> 5079  select(14, [3 6 10 11 13], [], [], {0, 10000}) = 1 (in [10], left
{0,
> 9995})
> 5079  read(10, "\36\0\0\0"..., 4)       = 4
> 5079  write(10, "\36\0\0\0"..., 4)      = 4
> 5079  mmap(NULL, 1048576, PROT_READ|PROT_WRITE, MAP_SHARED, 4, 0) =
> 0x7f1ad5f2b000
> 5079
>  ioctl(4,
 SNDCTL_DSP_STEREO, 0x7fffdfd52230) = 0
> 5079  --- SIGBUS (Bus error) @ 0 (0) ---
> 5157  +++ killed by SIGBUS +++
>
>
> This mmap and ioctl is from /proc/xen/privcmd.
>
>     J
>
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> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel
>
>

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