New: NMI watchdog lockup on reboot

http://bugme.osdl.org/show_bug.cgi?id=781

Summary: NMI watchdog lockup on reboot
Kernel Version: 2.5.70
Status: NEW
Severity: normal
Owner: [email protected]
Submitter: [email protected]

Distribution: SLES8 AMD64
Hardware Environment: Dual-proc AMD64 melody box.
Software Environment: 2.5.70
Problem Description:
Frequently when rebooting 2.5.70, the NMI Watchdog fires reporting the following:

NMI Watchdog detected LOCKUP on CPU0, registers:
CPU 0
Pid: 0, comm: swapper Not tainted

RIP: 0010:[<ffffffff8011bbc2>] <ffffffff8011bbc2>{.text.lock.smp+25} 
RSP: 0018:ffffffff80494ac8  EFLAGS: 00000086                         
RAX: 0000000000000002 RBX: 0000000000000000 RCX: 0000000000000000 
RDX: 0000000000000002 RSI: 0000000000000000 RDI: ffffffff8011ba00 
RBP: ffffffff8010f8b0 R08: 0000000000000001 R09: 0000000000009400 
R10: 0000000000000001 R11: ffffffff804951c0 R12: 0000000000000000 
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 
FS:  0000000000000000(0000) GS:ffffffff80490780(0000) knlGS:0000000000000000 
CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b                            
CR2: 0000002a9556a000 CR3: 0000000000101000 CR4: 00000000000006a0 
                                                                  
Call Trace: <EOE> <IRQ> <ffffffff8011ba00>{stop_this_cpu+0} 
<ffffffff8011ba49>{smp_send_stop+25}  
       <ffffffff80118af9>{machine_restart+9} <ffffffff8010f8b0>{default_idle+0}  
       <ffffffff8011bab0>{smp_call_function_interrupt+64}                       
       <ffffffff8010f8b0>{default_idle+0} <ffffffff80112023>{call_function_interrupt+99}  
        <EOI> <ffffffff801320b0>{thread_return+0} <ffffffff8010f8d7>{default_idle+39}  
       <ffffffff8010f8b0>{default_idle+0} <ffffffff8010f972>{cpu_idle+34}  
       <ffffffff804a7862>{start_kernel+418}                                
Process swapper (pid: 0, stackpage=ffffffff803d6e20) 
Stack: ffffffff8011ba00 0000000000000000 ffffffff00000000 0000000000000000  
       0000000000000001 ffffffff8011ba49 00000000fffffffd ffffffff80118af9  
       0000000000000000 ffffffff8010f8b0                                    
Call Trace:<IRQ> <ffffffff8011ba00>{stop_this_cpu+0} 
<ffffffff8011ba49>{smp_send_stop+25}  
       <ffffffff80118af9>{machine_restart+9} <ffffffff8010f8b0>{default_idle+0}  
       <ffffffff8011bab0>{smp_call_function_interrupt+64}                       
       <ffffffff8010f8b0>{default_idle+0} <ffffffff80112023>{call_function_interrupt+99}  
        <EOI> <ffffffff801320b0>{thread_return+0} <ffffffff8010f8d7>{default_idle+39}  
       <ffffffff8010f8b0>{default_idle+0} <ffffffff8010f972>{cpu_idle+34}  
       <ffffffff804a7862>{start_kernel+418}                                

Code: 7e f5 e9 53 fd ff ff 66 66 66 90 66 66 66 48 83 ec 08 be e8  

console shuts up ...

Disabling the nmi watchdog results in a silent hang rather then the watchdog report.

This problem has also been reported by Bryan O'Sullivan on [email protected].

Steps to reproduce:
1. Boot w/ 2.5.70
2. /sbin/init 6 and repeat until it occurs.