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xen-devel
Re: [Xen-devel] Re: [Xen-users] 2.6.23 oops
Quoting Mark Williamson <mark.williamson@xxxxxxxxxxxx>:
> 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.
Where does it hang for you?
I disabled SMP in my kernel config and found that the guest hung during the
kernel messages, just after:
installing Xen timer for CPU 0
Is this similar to what you observed?
That is exactly what I experienced. I tracked it down to:
xen_vcpuop_set_next_event(...)
ret = HYPERVISOR_vcpu_op(VCPUOP_set_singleshot_timer, cpu, &single);
always returns -ETIME
resulting in a infinite loop in
tick_setup_periodic(...)
Where this never succeeds
if (!clockevents_program_event(dev, next, ktime_get()))
return;
Now my brain needs a rest. I never thought I had to go head first into
the linux-kernel ;-) can't claim that I got any wiser ;-)
Cheers,
Mark
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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