Bug 7442

Summary:	BUG: warning at kernel/cpu.c:56/unlock_cpu_hotplug()
Product:	ACPI	Reporter:	Marco L (marco.loewl)
Component:	Config-Hotplug	Assignee:	acpi_other
Status:	CLOSED INSUFFICIENT_DATA
Severity:	normal	CC:	acpi-bugzilla, bunk
Priority:	P2
Hardware:	i386
OS:	Linux
Kernel Version:	2.6.18-1.2798.fc6	Subsystem:
Regression:	---	Bisected commit-id:

Description Marco L 2006-11-01 00:45:05 UTC

Most recent kernel where this bug did not occur:
Distribution: Fedora Core 6
Hardware Environment: Intel Server Board with dual core Xeon CPU 2.8 GHz
Software Environment: 64Bit !
Problem Description:

acpi-cpufreq: CPU0 - ACPI performance management activated.
acpi-cpufreq: CPU1 - ACPI performance management activated.
acpi-cpufreq: CPU2 - ACPI performance management activated.
acpi-cpufreq: CPU3 - ACPI performance management activated.
acpi-cpufreq: CPU4 - ACPI performance management activated.
acpi-cpufreq: CPU5 - ACPI performance management activated.
acpi-cpufreq: CPU6 - ACPI performance management activated.
acpi-cpufreq: CPU7 - ACPI performance management activated.
BUG: warning at kernel/cpu.c:56/unlock_cpu_hotplug() (Not tainted)

Call Trace:
 [<ffffffff8026929b>] show_trace+0x34/0x47
 [<ffffffff802692c0>] dump_stack+0x12/0x17
 [<ffffffff802a044f>] unlock_cpu_hotplug+0x47/0x74
 [<ffffffff803fee80>] store_speed+0xbf/0xcc
 [<ffffffff8026f992>] store+0x44/0x5b
 [<ffffffff802fb1ac>] sysfs_write_file+0xca/0xf9
 [<ffffffff802162b6>] vfs_write+0xce/0x174
 [<ffffffff80216b26>] sys_write+0x45/0x6e
 [<ffffffff8025c00e>] system_call+0x7e/0x83
DWARF2 unwinder stuck at system_call+0x7e/0x83
Leftover inexact backtrace:

BUG: warning at kernel/cpu.c:56/unlock_cpu_hotplug() (Not tainted)

Call Trace:
 [<ffffffff8026929b>] show_trace+0x34/0x47
 [<ffffffff802692c0>] dump_stack+0x12/0x17
 [<ffffffff802a044f>] unlock_cpu_hotplug+0x47/0x74
 [<ffffffff803fee80>] store_speed+0xbf/0xcc
 [<ffffffff8026f992>] store+0x44/0x5b
 [<ffffffff802fb1ac>] sysfs_write_file+0xca/0xf9
 [<ffffffff802162b6>] vfs_write+0xce/0x174
 [<ffffffff80216b26>] sys_write+0x45/0x6e
 [<ffffffff8025c00e>] system_call+0x7e/0x83
DWARF2 unwinder stuck at system_call+0x7e/0x83
Leftover inexact backtrace:


Steps to reproduce:

only boot the system :-)

Comment 1 Parag Warudkar 2006-12-26 20:29:17 UTC

Can you try 2.6.20-rc2? I had this similar errors with same FC6 kernel. The errors are no longer there 
since I upgraded to 2.6.20-rc2.

Comment 2 Adrian Bunk 2007-02-20 16:26:48 UTC

Please reopen this bug if it's still present with kernel 2.6.20.

Comment 3 Marco L 2007-02-21 02:58:08 UTC

I have test it and it's running fine ! thanks !

have test with the new suse kernel :


Linux version 2.6.20-2-default (geeko@buildhost) (gcc version 4.1.2 20070115
(prerelease) (SUSE Linux)) #1 SMP Wed Feb 7 21:04:19 UTC 2007