On Sep 8, 2011, at 8:42 AM, Andrzej Szeszo wrote:
> Hi Garrett
>
> I propose the change to workaround the problem for now to make qemu-kvm more
> usable. It is not a proper fix I agree.
>
> Without --enable-debug, CentOS 6 ISO fails to uncompress initial ramdisk and
> kernel is unable to find root device because of that . Illumos guests get
> stuck at boot and are not usable at all. Ubuntu guests seem to be fine.
>
> With --enable-debug CentOS and Illumos guests run fine.
>
> --enable-debug seems to be set by default by Joyent's build.sh sript used to
> build Qemu.
>
> We can wait for a proper fix I guess. Robert Mustacchi from Joyent is looking
> at the problem already.
>
> In the mean time though qemu-kvm from the repo will have limited use.
My biggest fear is that band-aids like this underscore a lack of understanding
of the problem. Which means you may have just deferred the problem to another
point rather than actually fixing anything. The other fear is that a band aid
like this can result in a situation where the root cause is never properly
investigated because folks are "satisfied" with the work around.
I'd suggest spending at least a couple of days trying to analyze the problem
before giving up and using the workaround.
- Garrett
>
> Andrzej
>
> On 08/09/2011 16:15, Garrett D'Amore wrote:
>> This feels like a hack rather than a fix. And a poor one at that. The
>> upstream bug indicates that the upstream have no such problems, and the
>> failure seen is indicative of a failure to find the boot device in the
>> guest. I recommend further investigation.
>>
>> - Garrett
>>
>> On Sep 8, 2011, at 7:28 AM, Andrzej Szeszo wrote:
>>
>>> I propose the change below to workaround https://www.illumos.org/issues/1479
>>>
>>> diff --git a/components/qemu-kvm/Makefile b/components/qemu-kvm/Makefile
>>> --- a/components/qemu-kvm/Makefile
>>> +++ b/components/qemu-kvm/Makefile
>>> @@ -46,6 +46,7 @@
>>> CONFIGURE_OPTIONS += --disable-kvm-device-assignment
>>> CONFIGURE_OPTIONS += --enable-trace-backend=dtrace
>>> CONFIGURE_OPTIONS += --target-list="i386-softmmu x86_64-softmmu"
>>> +CONFIGURE_OPTIONS += --enable-debug
>>>
>>> COMPONENT_BUILD_ENV += PATH=$(PATH):/usr/sbin
>>>
>>> Andrzej
>>>
>>>
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>>
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