Re: [Xen-devel] strange domU problem

["S.Çağlar Onur" <caglar@xxxxxxxxxxxxx>]

Hi;

10 Oca 2007 Çar 16:35 tarihinde, S.Çağlar Onur şunları yazmıştı: 
> After upgrading to current xen-3.0.4-testing.hg domU's starts to not
> working as expected, here are the some findings;
>
> * dom0 boot without a problem
> * xend starts without a problem
> * As soon as "xm create domain", domain enters a blocked state and never
> returns (nothing changes if i use old 3.0.3-domU kernel or new one)
> * dmesg, xen dmesg, xen logs shows nothing strange
> * Starting another domU while first domU in blocked state unfreezes first
> one for a while and first domU starts to boot but after a while (~5seconds)
> enters blocked state again
> * Second domU also enters blocked state as soon as it started
> * In order to boot/use first domU ,i have to continuosly destroy/create
> second domU but they always ended in blocked state

After trying lots of different setups i found the problem, somehow if xen/ is 
compiled with gcc-4.2 domU hangs forever as i described but dom0 boots/works 
fine without a problem. So here are the some more findings;

* gcc-3.4.6 compiled xen/ and gcc-4.2 compiled dom0/domU kernels (3.0.4_1) 
works well, 

* gcc-4.2 compiled xen/ and gcc-3.4.6 compiled dom0/domU kernels (3.0.3) hangs 
as described,

So neither gcc-4.2 generates wrong code for hypervisor or xen/ has some bugs 
triggered by gcc-4.2. Is there a way to debug/investigate so i can try to 
find the problem?

Cheers
-- 
S.Çağlar Onur <caglar@xxxxxxxxxxxxx>
http://cekirdek.pardus.org.tr/~caglar/

Linux is like living in a teepee. No Windows, no Gates and an Apache in house!

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