Re: [Qemu-devel] Re: Regression: QEMU 0.8.2 (and CVS) fails to boot a debian arm

[Aurelien Jarno <aurelien@aurel32.net>]

Aurelien Jarno a écrit :
> On Thu, Sep 07, 2006 at 11:45:37AM +0200, Aurelien Jarno wrote:
>> Paul Brook wrote:
>>>>> There is the same problem with QEMU CVS. Note that using root=/bin/sh
>>>>> works well using root on NFS and even using the emulated SCSI drive.
>>>> I think I have found the problem. Actually the system is not frozen, but
>>>> just very slow. I now get while booting the kernel:
>>>>  Calibrating delay loop... 12.16 BogoMIPS (lpj=60800)
>>>> instead of
>>>>  Calibrating delay loop... 486.60 BogoMIPS (lpj=2433024)
>>>>
>>>> Note that it is with the versatilepb (or versatileab) machine, the
>>>> problem is not there with the integrator one.
>>> I've not idea what might be causing this. It works fine for me using both 
>>> machine types.
>>>
>> So maybe I am doing something wrong, or I have something broken in my 
>> kernel. Here is the command line I used:
>>
>> qemu-system-arm -M versatilepb -kernel vmlinuz -initrd initrd.gz -append 
>> "root=/dev/ram console=ttyAMA0" -nographic
>>
>> The kernel and the initrd are available on http://temp.aurel32.net/arm . 
>> The initrd is actually the one from the debian-installer. To get a 
>> console, select "Go Back" to get a menu where you can select "Execute a 
>> shell".
>>
>> I have compared QEMU 0.8.1, QEMU 0.8.2 and QEMU CVS, both on an i386 and 
>> an amd64 machines. Versions 0.8.2 and CVS are a lot slower than version 
>> 0.8.1, even for booting the kernel.
>>
>> It would be nice if somebody could do the same tests, to make sure it is 
>> not related to my machines.
>>
> 
> I have been able to determine that the bug has been introduced between
> 20060714 and 20060715, so it is hidden somewhere in the diff attached. I
> will have a closer look later.
> 

And it seems the bug is only present on SMP (or HT) hosts.


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