linux-kernel - WARNING: at kernel/power/main.c:176 suspend_test

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Date:	Thu, 9 Oct 2008 21:14:25 -0400
From:	"Parag Warudkar" <parag.lkml@...il.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>
Subject: WARNING: at kernel/power/main.c:176 suspend_test_finish+0x70/0x80()

2.6.27 seems to be taking long time to resume, it hits this WARN_ON in
kernel/power/main.c:176 suspend_test_finish -
Never seen earlier.

[  295.600086] PM: resume devices took 10.180 seconds
[  295.600091] ------------[ cut here ]------------
[  295.600092] WARNING: at kernel/power/main.c:176
suspend_test_finish+0x70/0x80()
[  295.600094] Modules linked in: i2c_i801 i2c_core nls_iso8859_1
nls_cp437 vfat fat isofs udf af_packet binfmt_misc ipv6 sco bnep
rfcomm l2cap bluetooth ipt_MASQUERADE iptable_nat nf_nat
nf_conntrack_ipv4 xt_state nf_conntrack ipt_REJECT xt_tcpudp bridge
stp llc kvm_intel kvm ppdev acpi_cpufreq cpufreq_conservative
cpufreq_ondemand cpufreq_stats freq_table cpufreq_userspace
cpufreq_powersave wmi video output pci_slot container battery
iptable_filter ip_tables x_tables ac firewire_sbp2 lp snd_hda_intel
snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss
snd_seq_midi serio_raw snd_rawmidi evdev dm_multipath psmouse pcspkr
scsi_dh snd_seq_midi_event snd_seq snd_timer snd_seq_device
appledisplay snd parport_serial parport_pc soundcore parport shpchp
snd_page_alloc pci_hotplug button iTCO_wdt iTCO_vendor_support
intel_agp sd_mod sr_mod crc_t10dif cdrom usb_storage usbhid libusual
hid sg firewire_ohci firewire_core crc_itu_t ahci libata scsi_mod dock
ehci_hcd uhci_hcd usbcore e1000e dm_mirror dm_log dm_snapshot dm_mod
thermal processor fan fuse
[  295.600141] Pid: 7470, comm: pm-suspend Not tainted 2.6.27 #2
[  295.600142]
[  295.600142] Call Trace:
[  295.600147]  [<ffffffff802471ff>] warn_on_slowpath+0x5f/0x90
[  295.600150]  [<ffffffff804be7de>] ? printk+0x67/0x69
[  295.600164]  [<ffffffffa006fc10>] ? usb_autopm_do_device+0xc0/0x110 [usbcore]
[  295.600166]  [<ffffffff80377307>] ? kobject_put+0x27/0x60
[  295.600169]  [<ffffffff803f95c5>] ? put_device+0x15/0x20
[  295.600172]  [<ffffffff804017ba>] ? device_resume+0x39a/0x460
[  295.600174]  [<ffffffff802742e0>] suspend_test_finish+0x70/0x80
[  295.600176]  [<ffffffff802743d4>] suspend_devices_and_enter+0xe4/0x200
[  295.600178]  [<ffffffff80274666>] enter_state+0x146/0x1d0
[  295.600180]  [<ffffffff802747aa>] state_store+0xba/0x100
[  295.600181]  [<ffffffff803771c7>] kobj_attr_store+0x17/0x20
[  295.600184]  [<ffffffff80326475>] sysfs_write_file+0xc5/0x140
[  295.600186]  [<ffffffff802cd14b>] vfs_write+0xcb/0x190
[  295.600188]  [<ffffffff802cd300>] sys_write+0x50/0x90
[  295.600191]  [<ffffffff8021168a>] system_call_fastpath+0x16/0x1b
[  295.600192]
[  295.600193] ---[ end trace 8a154931a4b75ee4 ]---
[  295.600333] PM: Finishing wakeup.
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