What is a soft lockup?

[Zac Tolley]

I'm still at a loss as to what this error actually means?

Is this a problem with my disk controller not liking this build of  
fedora?




On 4 Jul 2006, at 14:47, Mike wrote:

> Hey Zac,
>
> maybe this helps you out:
> http://www.gossamer-threads.com/lists/linux/kernel/655450
>
> Mike
>
> Zac Tolley schreef:
>> I'm running a fc5 box, with a bunch of disks and opennms, which  
>> puts a high workload on the disks. Not running raid.
>>
>> In /var/logl/messages i get and error like this repeatedl. The box  
>> is a dual xeon and it seems like each cpu in turn shows this error.
>>
>> what does it mean?
>>
>>
>>
>> Jul  2 04:00:21 opennms kernel: BUG: soft lockup detected on CPU#2!
>> Jul  2 04:00:21 opennms kernel: CPU 2:
>> Jul  2 04:00:21 opennms kernel: Modules linked in: loop ipv6 ppdev  
>> autofs4 hidp rfcomm l2cap bluetooth sunrpc ip_conntrack_netbios_ns  
>> ipt_REJECT xt_state ip_conntrack nfnetlink xt_tcpudp  
>> iptable_filter ip_tables x_tables video button battery ac lp  
>> parport_pc parport floppy nvram uhci_hcd ehci_hcd e1000 tg3  
>> hw_random e752x_edac edac_mc dm_snapshot dm_zero dm_mirror dm_mod  
>> ext3 jbd cciss mptspi mptscsih sd_mod scsi_mod mptbase
>> Jul  2 04:00:21 opennms kernel: Pid: 27, comm: kblockd/2 Not  
>> tainted 2.6.15-1.2054_FC5 #1
>> Jul  2 04:00:21 opennms kernel: RIP: 0010:[<ffffffff8033b86a>]  
>> <ffffffff8033b86a>{_spin_unlock_irqrestore+11}
>> Jul  2 04:00:21 opennms kernel: RSP: 0018:ffff81015b435e08   
>> EFLAGS: 00000247
>> Jul  2 04:00:21 opennms kernel: RAX: 0000000000000002 RBX:  
>> 0000000000000247 RCX: ffff81015a4d2850
>> Jul  2 04:00:21 opennms kernel: RDX: 0000000000000002 RSI:  
>> 0000000000000247 RDI: ffff81015a40b3d8
>> Jul  2 04:00:21 opennms kernel: RBP: ffff81015a4d2938 R08:  
>> ffff81015a4d28a0 R09: ffff81015a4d2800
>> Jul  2 04:00:21 opennms kernel: R10: 00000000dffe0000 R11:  
>> ffff81015a40b000 R12: ffff81015b4118c0
>> Jul  2 04:00:21 opennms kernel: R13: 0000000000000247 R14:  
>> ffff81015b028ce8 R15: ffffffff801fd5c7
>> Jul  2 04:00:21 opennms kernel: FS:  0000000000000000(0000)  
>> GS:ffff81015bf256c0(0000) knlGS:0000000000000000
>> Jul  2 04:00:21 opennms kernel: CS:  0010 DS: 0018 ES: 0018 CR0:  
>> 000000008005003b
>> Jul  2 04:00:21 opennms kernel: CR2: 00002b78d369f000 CR3:  
>> 0000000000101000 CR4: 00000000000006e0
>> Jul  2 04:00:21 opennms kernel:
>> Jul  2 04:00:21 opennms kernel: Call Trace: <ffffffff801425e1> 
>> {run_workqueue+159} <ffffffff80142c7a>{worker_thread+0}
>> Jul  2 04:00:21 opennms kernel:        <ffffffff80145ca3> 
>> {keventd_create_kthread+0} <ffffffff80142d83>{worker_thread+265}
>> Jul  2 04:00:21 opennms kernel:        <ffffffff8012959c> 
>> {__wake_up_common+62} <ffffffff8012ad74>{default_wake_function+0}
>> Jul  2 04:00:21 opennms kernel:        <ffffffff80145ca3> 
>> {keventd_create_kthread+0} <ffffffff80145fb6>{kthread+254}
>> Jul  2 04:00:21 opennms kernel:        <ffffffff8010b8e6>{child_rip 
>> +8} <ffffffff80145ca3>{keventd_create_kthread+0}
>> Jul  2 04:00:21 opennms kernel:        <ffffffff80339fce> 
>> {thread_return+0} <ffffffff80145eb8>{kthread+0}
>> Jul  2 04:00:21 opennms kernel:        <ffffffff8010b8de>{child_rip 
>> +0}
>>
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>
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