Re: [SOLVED] kqemu on Sid

Hugo Vanwoerkom wrote:

> Hugo Vanwoerkom wrote:
>> David Baron wrote:
>>> On Tuesday 19 June 2007, debian-user-digest-request@lists.debian.org 
>>> wrote:

>>>> Thanks for the replies.
>>>>
>>>> However you cannot use the kqemu Sid package because that depends 
>>>> upon a
>>>> non-existent kernel.
>>>
>>> The source package is also on Sid. Try installing that using m-a (the 
>>> Debian way but I have also numerous times used sources from the site 
>>> and compiled manually and simply copied the .ko to it correct place), 
>>> change that modprobed/kqemu file and try again. I do not have XP 
>>> images around to try but qemu runs most everything.
>>>
>>> For an alternative, you might try virtualbox (they have an opensource 
>>> version, a free binary and a paid product). Runs some stuff better 
>>> then qemu, somewhat different approach. But it does not run everyting 
>>> qemu does.
>>>
>>>
>>>
>>
>> I saw that: it is kqemu_1.3.0~pre11.orig.tar.gz. But the kqemu I 
>> installed with is kqemu-1.3.0pre11.tar.gz. Seems to me to be the very 
>> same thing. I was going to try a different kernel, I am now running
>> Linux debian 2.6.21-1-k7 #1 SMP PREEMPT
>> and I was going to backup to 2.6.18-k7 which no longer is in Sid but I 
>> kept the .debs in my repository.
>> It's more a question of "this ought to work" than running XP because I 
>> found out what I needed to know by now.
> 
> So kqemu-1.3.0pre11 (the latest version) hangs the system solid with 
> 2.6.21-1-k7, the Debian stock kernel. But I have modified that kernel 
> with 2.6.21-ck2 from here:
> 
http://members.optusnet.com.au/ckolivas/kernel/
> 
> Going back to the plain 2.6.18-4-k7 Debian kernel and reinstalling kqemu 
> all errors disappear and XP initiates "normally" (i.e. M$'s version of 
> "normal").
> 
> So the problem lies either in 2.6.21-1-k7 or in the -ck modification.
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> 

In neither. The 2.6.21-1-k7 kernel kqemu fails with has been modified by me to turn *off* paravirtualization. Defined as follows:

Paravirtualization is a way of running multiple instances of Linux on the same machine, under a hypervisor. This option changes the kernel so it can modify itself when it is run under a hypervisor, improving performance significantly. However, when run without a hypervisor the kernel is theoretically slower. If in doubt, say N.

The reason I do that is because with PARAVIRT_CONFIG *set* the installation of the nvidia closed source driver will fail.

So I turned it off and... qemu hangs on execution.

There is an alternative way of using the unmodified linux-image-2.6.21-1-k7/686 and instead modifying the linux-kbuild-2.6.21 .deb and installing the nvidia driver by hand and twiddling some things.

The gory details are here:
http://www.nvnews.net/vbulletin/showthread.php?t=89844

So qemu hangs in kernel 2.6.21 if you turned off paravirtualization and are using kqemu. End of story.

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Have a good day.

Hugo

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