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

To: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>, Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Subject: Re: [Xen-devel] HVM pvops failures (one more qemu-dm.strace obtained)
From: Boris Derzhavets <bderzhavets@xxxxxxxxx>
Date: Tue, 24 Feb 2009 03:38:17 -0800 (PST)
Cc: Andrew Lyon <andrew.lyon@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Ian Campbell <Ian.Campbell@xxxxxxxxxx>
Delivery-date: Thu, 05 Mar 2009 10:47:26 -0800
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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.
>
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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Attachment: qemu-dm.strace
Description: Binary data

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