[Xen-devel] Re: [Xen-users] 2.6.23 oops

[Mark Williamson <mark.williamson@xxxxxxxxxxxx>]

I'm bringing this discussion onto Xen-devel as it smells like it needs some 
more specific developer input than I can give.

>   I've tried to run 2.6.23 on xen 3.1.0, my hardware is a Dual Athlon MP.
> my DomU is running 2.6.23 SMP (vcpus = 1), without SMP it hang during
> boot, with it panics. I've attached my config, if somebody thinks I've
> left something out

Do you mean that it hangs during boot if SMP is not compiled into the guest 
kernel?  That seems strange, I'll try that out myself and see what happens.

How far into the boot does it manage to get?  Has it started running userspace 
apps (the normal startup messages starting essential services), or is it 
still during the kernel initialisation?

> Does anybody else see this:

I've booted a kernel successfully on a UP AMD64 box with an SMP 2.6.23 kernel, 
vcpus = 1 but I didn't bother giving it a virtual disk, so I don't know if 
userspace worked.  I'll give it a try shortly...

Cheers,
Mark

> ------------[ cut here ]------------
> kernel BUG at arch/i386/xen/multicalls.c:68!
> invalid opcode: 0000 [#1]
> SMP
> CPU:    0
> EIP:    0061:[<c01019a6>]    Not tainted VLI
> EFLAGS: 00010002   (2.6.23 #26)
> EIP is at xen_mc_flush+0xa6/0xb0
> eax: 00000001   ebx: 00000003   ecx: 00000001   edx: c10c1060
> esi: 00000000   edi: 00000001   ebp: c5c8d000   esp: c1101d28
> ds: 007b   es: 007b   fs: 00d8  gs: 0000  ss: e021
> Process swapper (pid: 1, ti=c1100000 task=c10eda90 task.ti=c1100000)
> Stack: 000218ee c10c10a0 c10c1460 c0101ede c5c8ce40 c02b90e0 c10eda90
> 00000000 c0101ff3 c5c8ce40 c015caca c5d3b49c 00000080 c5eadaa0 00000000
> c10eed80 c01584d0 c02b9a80 c5cfd560 c02a53d2 c1142440 c015c077 c1101d84
> c5eadaa0 Call Trace:
>   [<c0101ede>] xen_pgd_pin+0x9e/0x100
>   [<c0101ff3>] xen_activate_mm+0x13/0x20
>   [<c015caca>] flush_old_exec+0x3ca/0x7f0
>   [<c01584d0>] do_sync_read+0x0/0x120
>   [<c015c077>] kernel_read+0x37/0x50
>   [<c018308e>] load_elf_binary+0x2fe/0x1af0
>   [<c013ec27>] __alloc_pages+0x57/0x310
>   [<c0155387>] kmem_cache_alloc+0x47/0x90
>   [<c0147610>] handle_mm_fault+0x540/0x710
>   [<c01585a5>] do_sync_read+0xd5/0x120
>   [<c0145e10>] vm_normal_page+0x10/0x70
>   [<c0145e10>] vm_normal_page+0x10/0x70
>   [<c0146471>] follow_page+0xf1/0x170
>   [<c01478ca>] get_user_pages+0xea/0x2e0
>   [<c015bbe2>] get_arg_page+0x42/0xa0
>   [<c015bdc6>] copy_strings+0x186/0x1a0
>   [<c015be64>] search_binary_handler+0x54/0x110
>   [<c015d83b>] do_execve+0x14b/0x170
>   [<c010425f>] sys_execve+0x2f/0x90
>   [<c0105c72>] syscall_call+0x7/0xb
>   [<c010a364>] kernel_execve+0x14/0x20
>   [<c0100173>] init_post+0xa3/0xf0
>   [<c02d594f>] kernel_init+0x20f/0x310
>   [<c0118464>] schedule_tail+0x34/0x90
>   [<c0105b16>] ret_from_fork+0x6/0x20
>   [<c0105c7b>] syscall_exit+0x5/0x1b
>   [<c02d5740>] kernel_init+0x0/0x310
>   [<c02d5740>] kernel_init+0x0/0x310
>   [<c0106e77>] kernel_thread_helper+0x7/0x10
>   =======================



-- 
Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!

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