linux-kernel - [2.6.26] WARN warn_on

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Message-ID: <20081104172513.GH23232@vanheusden.com>
Date:	Tue, 4 Nov 2008 18:25:17 +0100
From:	Folkert van Heusden <folkert@...heusden.com>
To:	linux-kernel@...r.kernel.org
Subject: [2.6.26] WARN warn_on_slowpath

While running my http://vanheusden.com/pyk/ script (which randomly
inserts and removes modules) I triggered the folllowing WARNING in a
2.6.26 kernel on an IBM xSeries x3650 (2 quadcores (intel qc x5450)
and 10GB ram).

[ 2812.832441] sysfs group ffffffffa0191ec0 not found for kobject 'cpufreq'
[ 2812.833486] ------------[ cut here ]------------
[ 2812.833556] WARNING: at fs/sysfs/group.c:139 cpufreq_stats_free_table+0x32/0x6e [cpufreq_stats]()
[ 2812.837160] Modules linked in: cpufreq_ondemand sg lp cpufreq_userspace acpi_cpufreq pcspkr edac_core ses parport_pc appletalk(-) enclosure loop thermal parport cpufreq_stats(-) video output battery cdrom rng_core qla2xxx ac rfcomm l2cap bluetooth nfsd lockd nfs_acl auth_rpcgss sunrpc exportfs freq_table ipv6 evdev ext3 jbd mbcache dm_log dm_mod usbhid hid ff_memless sd_mod firmware_class scsi_transport_fc ide_pci_generic ide_core ehci_hcd uhci_hcd scsi_tgt aacraid scsi_mod processor thermal_sys [last unloaded: dm_mirror]
[ 2812.837160] Pid: 12061, comm: rmmod Not tainted 2.6.26-1-amd64 #1
[ 2812.837160] 
[ 2812.837160] Call Trace:
[ 2812.837160]  [<ffffffff80234878>] warn_on_slowpath+0x51/0x7a
[ 2812.837160]  [<ffffffff8022c195>] default_wake_function+0x0/0xe
[ 2812.837160]  [<ffffffff802e21b4>] sysfs_find_dirent+0x1b/0x2f
[ 2812.837160]  [<ffffffff802e2c62>] sysfs_get_dirent+0x51/0x59
[ 2812.837160]  [<ffffffff802e3523>] sysfs_remove_group+0x41/0xc2
[ 2812.837197]  [<ffffffffa0191380>] :cpufreq_stats:cpufreq_stats_free_table+0x32/0x6e
[ 2812.837283]  [<ffffffffa01913fd>] :cpufreq_stats:cpufreq_stats_exit+0x41/0x58
[ 2812.837355]  [<ffffffff80255200>] sys_delete_module+0x1a6/0x1fe
[ 2812.837494]  [<ffffffff8020be9a>] system_call_after_swapgs+0x8a/0x8f
[ 2812.837564] 
[ 2812.837623] ---[ end trace a70f168407a6dea1 ]---
[ 2812.837692] sysfs group ffffffffa0191ec0 not found for kobject 'cpufreq'


Folkert van Heusden

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