From mboxrd@z Thu Jan  1 00:00:00 1970
From: Avi Kivity <avi@redhat.com>
Subject: Re: Weekly KVM Test report, kernel 30d95f ... userspace fc94d1 ...
Date: Thu, 27 Nov 2008 12:57:29 +0200
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Cc: "'kvm@vger.kernel.org'" <kvm@vger.kernel.org>,
	Anthony Liguori <anthony@codemonkey.ws>
To: "Xu, Jiajun" <jiajun.xu@intel.com>
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Xu, Jiajun wrote:
> On Wednesday, November 26, 2008 8:43 PM kvm-owner@vger.kernel.org wrote:
>
>   
>> Xu, Jiajun wrote:
>>     
>>> The call trace messages in guest:
>>> ###################
>>> Kernel BUG at block/elevator.c:560
>>> invalid opcode: 0000 [1] SMP
>>> last sysfs file: /block/hda/removable
>>>
>>>       
>> This suggests something happened to /dev/hda.  Could be a timeout or
>> something.  Are there any messages in the log before the BUG?
>>     
>
> There are two parts call traces:
> First, when I do live migration, on the original guest there are some call trace:
> ################
> BUG: soft lockup detected on CPU#0!
>
> Call Trace:
>  <IRQ>  [<ffffffff800b50fa>] softlockup_tick+0xd5/0xe7
>  [<ffffffff800930e2>] update_process_times+0x42/0x68
>  [<ffffffff800746e3>] smp_local_timer_interrupt+0x23/0x47
>  [<ffffffff80074da5>] smp_apic_timer_interrupt+0x41/0x47
>  [<ffffffff8005bc8e>] apic_timer_interrupt+0x66/0x6c
>  [<ffffffff800076b2>] ide_outb+0x0/0x9
>  [<ffffffff80011ca9>] __do_softirq+0x53/0xd5
>  [<ffffffff8005c2fc>] call_softirq+0x1c/0x28
>  [<ffffffff8006a53a>] do_softirq+0x2c/0x85
>  [<ffffffff8005bc8e>] apic_timer_interrupt+0x66/0x6c
>  <EOI>  [<ffffffff800076b2>] ide_outb+0x0/0x9
>  [<ffffffff800076ba>] ide_outb+0x8/0x9
>  [<ffffffff8000eac7>] ide_do_request+0x408/0x787
>  [<ffffffff80134f37>] elv_insert+0xd6/0x1f7
>  [<ffffffff8003f5af>] ide_do_drive_cmd+0xc8/0x11e
>  [<ffffffff8005857f>] ide_outsw+0x0/0x9
>  [<ffffffff8811f198>] :ide_cd:cdrom_queue_packet_command+0x46/0xe2
>  [<ffffffff80058587>] ide_outsw+0x8/0x9
>  [<ffffffff801c127a>] ide_init_drive_cmd+0x10/0x24
>  [<ffffffff8811f462>] :ide_cd:cdrom_check_status+0x62/0x71
>  [<ffffffff801360b5>] blk_end_sync_rq+0x0/0x2e
>  [<ffffffff8811f48d>] :ide_cd:ide_cdrom_check_media_change_real+0x1c/0x37
>  [<ffffffff8810d076>] :cdrom:media_changed+0x44/0x74
>  [<ffffffff800d9b83>] check_disk_change+0x1f/0x76
>  [<ffffffff88111399>] :cdrom:cdrom_open+0x92c/0x979
>  [<ffffffff8000c9c9>] do_lookup+0x65/0x1c3
>  [<ffffffff8000cec4>] dput+0x2c/0x114
>  [<ffffffff8000a2e0>] __link_path_walk+0xdf8/0xf42
>  [<ffffffff8002c86b>] mntput_no_expire+0x19/0x89
>  [<ffffffff8000e630>] link_path_walk+0xd3/0xe5
>  [<ffffffff80061c7e>] do_nanosleep+0x47/0x70
>  [<ffffffff800560a3>] kobject_get+0x12/0x17
>  [<ffffffff80138bbd>] get_disk+0x3f/0x81
>  [<ffffffff80058ef8>] exact_lock+0xc/0x14
>  [<ffffffff801ad98f>] kobj_lookup+0x132/0x19b
>  [<ffffffff8811fe4b>] :ide_cd:idecd_open+0x9f/0xd1
>  [<ffffffff800da1bc>] do_open+0xa2/0x30f
>  [<ffffffff80011d83>] may_open+0x58/0x21e
>  [<ffffffff800da67d>] blkdev_open+0x0/0x4f
>  [<ffffffff800da6a0>] blkdev_open+0x23/0x4f
>  [<ffffffff8001e0f4>] __dentry_open+0xd9/0x1dc
>  [<ffffffff800270dc>] do_filp_open+0x2a/0x38
>  [<ffffffff80061c7e>] do_nanosleep+0x47/0x70
>  [<ffffffff80019523>] do_sys_open+0x44/0xbe
>  [<ffffffff8005b28d>] tracesys+0xd5/0xe0
>   

Anthony, could migration be starving qemu_mutex and thus the guest?



-- 
error compiling committee.c: too many arguments to function