Re: KVM-AMD OOPS

Avi Kivity
2007-07-09T12:58:40Z

Jiri Slaby wrote:
> Jeremy Fitzhardinge napsal(a):
>
>> Sasa Ostrouska wrote:
>>
>>> root@rcserver:~# modprobe kvm-amd
>>> int3: 0000 [1] PREEMPT SMP
>>> CPU 1
>>> Modules linked in: kvm_amd snd_seq_dummy snd_seq_oss
>>> snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss
>>> nls_iso8859_1 ntfs nls_base usb_storage libusual capability commoncap
>>> lp psmouse snd_hda_intel snd_hda_codec snd_pcm snd_timer ohci_hcd
>>> ehci_hcd 8139too rtc_cmos snd soundcore snd_page_alloc usbcore k8temp
>>> mii rtc_core rtc_lib i2c_nforce2 parport_pc parport
>>> Pid: 2898, comm: modprobe Tainted: P 2.6.21.5 #1
>>> RIP: 0010:[<ffffffff80572364>] [<ffffffff80572364>]
>>> register_cpu_notifier+0x1/0x31
>>> RSP: 0000:ffff81006e34df40 EFLAGS: 00000246
>>> RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00000000c0010117
>>> RDX: 000000000000ffff RSI: ffff81006e219640 RDI: ffffffff80536510
>>> RBP: ffffffff880d8840 R08: 0000000000000000 R09: 000000000006b5f4
>>> R10: 0000000000000000 R11: 0000000000000000 R12: 00000000005296b0
>>> R13: 00007fff51fe55c0 R14: 0000000000000000 R15: 0000000000000000
>>> FS: 00002b4e58e18b00(0000) GS:ffff810002e794c0(0000)
>>> knlGS:0000000000000000
>>> CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
>>> CR2: 000000000050df64 CR3: 000000007a0f3000 CR4: 00000000000006e0
>>> Process modprobe (pid: 2898, threadinfo ffff81006e34c000, task
>>> ffff81007bc48400)
>>> Stack: ffffffff8039e024 ffff81006e34c000 ffffffff880d8840
>>> 0000000000005e19
>>> ffffffff8024537c 0000000000000000 00007fff51fe50c0 00000000004142d0
>>> ffffffff8020967e 0000000000000206 00000000005230e0 000000000052f4c9
>>> Call Trace:
>>> [<ffffffff8039e024>] kvm_init_arch+0x90/0x145
>>> [<ffffffff8024537c>] sys_init_module+0xad/0x168
>>> [<ffffffff8020967e>] system_call+0x7e/0x83
>>>
>>>
>>> Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc
>>>
>> This is the init section poison pattern. Looks like an init function
>> was used after the code was freed.
>>
>
> This?
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=65edc68c345cbe21d0b0375c3452a3ed5e322868;hp=054cc8a2d808822dadf488a61729e3e550f114c4
>
> Could you revert it and test?
>
>

There's actually a patch (by me) after that to allow modules to call the
cpu hotplug functions if !CONFIG_HOTPLUG_CPU; but in this case kvm was
built in while kvm-amd.ko is a module, which confused that logic.