[Bugme-new] [Bug 6647] New: second suspend fails if nmi watchdog is enabled

[bugme-daemon at bugzilla.kernel.org]

http://bugzilla.kernel.org/show_bug.cgi?id=6647

           Summary: second suspend fails if nmi watchdog is enabled
    Kernel Version: 2.6.17-rc5-mm3
            Status: NEW
          Severity: normal
             Owner: platform_i386 at kernel-bugs.osdl.org
         Submitter: jeremy at goop.org
                CC: ak at suse.de,venkatesh.pallipadi at intel.com


Most recent kernel where this bug did not occur:2.6.17-rc5
Distribution:FC5
Hardware Environment:Thinkpad X60: 1.83Ghz Intel Core Duo
Software Environment:
Problem Description:
When suspending to ram with ACPI with the watchdog enabled, the machine crashes
with BUG in arch/i386/kernel/nmi.c:174.  The stack backtrace is:


    release_evntsel_nmi
    stop_apci_nmi_watchdog
    on_each_cpu
    disable_lapic_nmi_watchdog
    lapic_nmi_suspend
    sysdev_suspend
    device_power_down
    suspend_enter
    enter_state
    state_store
    subsys_attr_store
    sysfs_write_file
    vfs_write
    sys_write
    sysenter_past_esp 
Steps to reproduce:
1. boot with nmi_watchdog set to default setting
2. suspend to ram, and resume
3. suspend to ram again - crash during suspend

booting with nmi_watchdog=0 on the kernel command line works around the problem.

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