warn_on_slowpath on resume on macbook

[Nikolaj Sheller]

From a macbook core 2 duo under 2.6.27-7-generic #1 SMP Thu Oct 30 04:12:22 UTC 2008 x86_64 GNU/Linux on resume.

Oct 31 20:50:43 AppleCider kernel: [ 5270.696052] ------------[ cut here ]------------
Oct 31 20:50:43 AppleCider kernel: [ 5270.696054] WARNING: at /build/buildd/linux-2.6.27/kernel/power/main.c:176 suspend_test_finish+0x75/0x80()
Oct 31 20:50:43 AppleCider kernel: [ 5270.696056] Modules linked in: isofs udf crc_itu_t usb_storage libusual ipv6 aes_x86_64 aes_generic i915 drm af_packet binfmt_misc btusb sco bridge stp rfcomm bnep l2cap bluetooth uinput ppdev acpi_cpufreq cpufreq_stats cpufreq_userspace cpufreq_ondemand cpufreq_conservative freq_table cpufreq_powersave pci_slot sbs wmi container sbshc iptable_filter ip_tables x_tables sbp2 parport_pc lp parport joydev snd_hda_intel iTCO_wdt arc4 iTCO_vendor_support snd_pcm_oss ecb snd_mixer_oss pcspkr crypto_blkcipher snd_pcm appleir isight_firmware snd_seq_dummy ath9k evdev appletouch mac80211 snd_seq_oss snd_seq_midi cfg80211 snd_rawmidi snd_seq_midi_event snd_seq snd_timer video output snd_seq_device snd shpchp pci_hotplug battery ac button soundcore intel_agp snd_page_alloc ext3 jbd mbcache sd_mod crc_t10dif sr_mod cdrom sg ata_generic ata_piix usbhid hid pata_acpi libata scsi_mod ohci1394 dock ieee1394 ehci_hcd uhci_hcd usbcore sky2 thermal processor fan fbcon tileblit font bitblit softcu
Oct 31 20:50:43 AppleCider kernel: sor fuse
Oct 31 20:50:43 AppleCider kernel: [ 5270.696106] Pid: 10567, comm: pm-suspend Not tainted 2.6.27-7-generic #1
Oct 31 20:50:43 AppleCider kernel: [ 5270.696108]
Oct 31 20:50:43 AppleCider kernel: [ 5270.696108] Call Trace:
Oct 31 20:50:43 AppleCider kernel: [ 5270.696113] [<ffffffff8024e9b4>] warn_on_slowpath+0x64/0x90
Oct 31 20:50:43 AppleCider kernel: [ 5270.696117] [<ffffffff804fffa6>] ? printk+0x6c/0x6e
Oct 31 20:50:43 AppleCider kernel: [ 5270.696122] [<ffffffff803a3fb7>] ? kobject_put+0x27/0x60
Oct 31 20:50:43 AppleCider kernel: [ 5270.696124] [<ffffffff80501049>] ? mutex_unlock+0x9/0x20
Oct 31 20:50:43 AppleCider kernel: [ 5270.696128] [<ffffffff80434e4a>] ? dpm_complete+0x18a/0x1a0
Oct 31 20:50:43 AppleCider kernel: [ 5270.696130] [<ffffffff8027e1a5>] suspend_test_finish+0x75/0x80
Oct 31 20:50:43 AppleCider kernel: [ 5270.696133] [<ffffffff8027e2b4>] suspend_devices_and_enter+0x104/0x1b0
Oct 31 20:50:43 AppleCider kernel: [ 5270.696135] [<ffffffff8027e571>] enter_state+0xe1/0x110
Oct 31 20:50:43 AppleCider kernel: [ 5270.696138] [<ffffffff8027e65a>] state_store+0xba/0x100
Oct 31 20:50:43 AppleCider kernel: [ 5270.696140] [<ffffffff803a3e57>] kobj_attr_store+0x17/0x20
Oct 31 20:50:43 AppleCider kernel: [ 5270.696143] [<ffffffff803495fa>] sysfs_write_file+0xca/0x140
Oct 31 20:50:43 AppleCider kernel: [ 5270.696147] [<ffffffff802e9e9b>] vfs_write+0xcb/0x130
Oct 31 20:50:43 AppleCider kernel: [ 5270.696149] [<ffffffff802e9ff5>] sys_write+0x55/0x90
Oct 31 20:50:43 AppleCider kernel: [ 5270.696153] [<ffffffff8021285a>] system_call_fastpath+0x16/0x1b
Oct 31 20:50:43 AppleCider kernel: [ 5270.696154]
Oct 31 20:50:43 AppleCider kernel: [ 5270.696156] ---[ end trace 307da02a144a394b ]---

[John Pugh (jpugh)]

What version of Macbook are you using? 3,1 4,1 5,1?
Is is pro or standard Macbook?

Have you tested the 2.27.11 kernel in ubuntu-proposed?

[Nikolaj Sheller (nikolajsheller)]

I'm using a Macbook2,1.
I have not tested with 2.6.27.11 yet, but the stack trace is not present in messages under kernel 2.6.27-9.19-generic.

[Nikolaj Sheller (nikolajsheller)]

Standard Macbook, not pro.

[Nikolaj Sheller (nikolajsheller)]

Whoops.
Searching through my logs I found an instance of the warn_on_slowpath under the 2.6.27-9.19-generic kernel.

(I also found some interesting "ext3_discard_reservation" entries, for another bug report...)

I will try with the 2.6.27.11 kernel.

[Nikolaj Sheller (nikolajsheller)]

I have now installed 2.6.27.11 and done a couple of suspend/resumes.
Initially the log looks OK, but as the stack traces don't appear every time I will monitor the log under this kernel version.

[Nikolaj Sheller (nikolajsheller)]

I still have not seen any warn_on_slowpath dumps.

I think this may be solved.

[Nikolaj Sheller (nikolajsheller)]

I spoke too soon.
I saw this again on a Dell Optiplex 745 running Intrepid with kernel 2.6.27.11 after resuming from suspend.
Sound failed as well.

Log attached.