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Subject[Bug 781] 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: ak@suse.de
Submitter: johnstul@us.ibm.com


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 discuss@x86-64.org.

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

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