WARNING: at kref_get

WARNING: at kref_get

[Jim Rees]

Was there ever a resolution to this bug?

Date: Tue Nov 2 14:49:08 PDT 2010
Subject: [GIT PULL] One more power management fix for 2.6.37
https://lists.linux-foundation.org/pipermail/linux-pm/2010-November/029299.html

I'm still seeing this in the Ubuntu version of 2.6.38-rc6.  I'd be happy to
try with the kernel.org version if anyone thinks it would make a difference.

WARNING: at /u/rees/l/linux-natty/lib/kref.c:34 kref_get+0x21/0x30()
Hardware name: 2386BHU
Modules linked in: sha1_generic arc4 ppp_mppe ppp_async crc_ccitt michael_mic orinoco_cs orinoco cfg80211 parport_pc dm_crypt ppdev snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm_oss pcmcia snd_mixer_oss snd_pcm thinkpad_acpi snd_timer yenta_socket psmouse snd pcmcia_rsrc serio_raw pcmcia_core snd_page_alloc soundcore nvram lp parport i915 fbcon tileblit font bitblit softcursor drm_kms_helper drm usbhid intel_agp i2c_algo_bit intel_gtt e1000 sdhci_pci hid ata_piix sdhci video agpgart
Pid: 7110, comm: pm-suspend Not tainted 2.6.38-rc6-x40 #5
Call Trace:
 [<c0147dd2>] ? warn_slowpath_common+0x72/0xa0
 [<c031fc51>] ? kref_get+0x21/0x30
 [<c031fc51>] ? kref_get+0x21/0x30
 [<c0147e22>] ? warn_slowpath_null+0x22/0x30
 [<c031fc51>] ? kref_get+0x21/0x30
 [<c031ebd2>] ? kobject_get+0x12/0x20
 [<c03b6958>] ? get_device+0x18/0x20
 [<c03bfd70>] ? dpm_resume_end+0x1c0/0x2b0
 [<c0180768>] ? suspend_devices_and_enter+0xb8/0x260
 [<c0577f95>] ? printk+0x1d/0x20
 [<c0180a18>] ? enter_state+0x108/0x130
 [<c017ffbd>] ? state_store+0x6d/0xb0
 [<c017ff50>] ? state_store+0x0/0xb0
 [<c031e7b0>] ? kobj_attr_store+0x20/0x30
 [<c02637c9>] ? sysfs_write_file+0x99/0xf0
 [<c020a9d2>] ? vfs_write+0xa2/0x170
 [<c0263730>] ? sysfs_write_file+0x0/0xf0
 [<c020ab72>] ? sys_write+0x42/0x70
 [<c057ae0c>] ? syscall_call+0x7/0xb
---[ end trace 3295bc3b85c7d9eb ]---
PM: resume devices took 0.916 seconds
Restarting tasks ... 
done.
video LNXVIDEO:00: Restoring backlight state
EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro,commit=0

Re: WARNING: at kref_get

[Rafael J. Wysocki]

On Thursday, March 10, 2011, Jim Rees wrote:
> Was there ever a resolution to this bug?

Do you still see the warning in 2.6.38-rc8?

Rafael


> Date: Tue Nov 2 14:49:08 PDT 2010
> Subject: [GIT PULL] One more power management fix for 2.6.37
> https://lists.linux-foundation.org/pipermail/linux-pm/2010-November/029299.html
> 
> I'm still seeing this in the Ubuntu version of 2.6.38-rc6.  I'd be happy to
> try with the kernel.org version if anyone thinks it would make a difference.
> 
> WARNING: at /u/rees/l/linux-natty/lib/kref.c:34 kref_get+0x21/0x30()
> Hardware name: 2386BHU
> Modules linked in: sha1_generic arc4 ppp_mppe ppp_async crc_ccitt michael_mic orinoco_cs orinoco cfg80211 parport_pc dm_crypt ppdev snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm_oss pcmcia snd_mixer_oss snd_pcm thinkpad_acpi snd_timer yenta_socket psmouse snd pcmcia_rsrc serio_raw pcmcia_core snd_page_alloc soundcore nvram lp parport i915 fbcon tileblit font bitblit softcursor drm_kms_helper drm usbhid intel_agp i2c_algo_bit intel_gtt e1000 sdhci_pci hid ata_piix sdhci video agpgart
> Pid: 7110, comm: pm-suspend Not tainted 2.6.38-rc6-x40 #5
> Call Trace:
>  [<c0147dd2>] ? warn_slowpath_common+0x72/0xa0
>  [<c031fc51>] ? kref_get+0x21/0x30
>  [<c031fc51>] ? kref_get+0x21/0x30
>  [<c0147e22>] ? warn_slowpath_null+0x22/0x30
>  [<c031fc51>] ? kref_get+0x21/0x30
>  [<c031ebd2>] ? kobject_get+0x12/0x20
>  [<c03b6958>] ? get_device+0x18/0x20
>  [<c03bfd70>] ? dpm_resume_end+0x1c0/0x2b0
>  [<c0180768>] ? suspend_devices_and_enter+0xb8/0x260
>  [<c0577f95>] ? printk+0x1d/0x20
>  [<c0180a18>] ? enter_state+0x108/0x130
>  [<c017ffbd>] ? state_store+0x6d/0xb0
>  [<c017ff50>] ? state_store+0x0/0xb0
>  [<c031e7b0>] ? kobj_attr_store+0x20/0x30
>  [<c02637c9>] ? sysfs_write_file+0x99/0xf0
>  [<c020a9d2>] ? vfs_write+0xa2/0x170
>  [<c0263730>] ? sysfs_write_file+0x0/0xf0
>  [<c020ab72>] ? sys_write+0x42/0x70
>  [<c057ae0c>] ? syscall_call+0x7/0xb
> ---[ end trace 3295bc3b85c7d9eb ]---
> PM: resume devices took 0.916 seconds
> Restarting tasks ... 
> done.
> video LNXVIDEO:00: Restoring backlight state
> EXT4-fs (sda1): re-mounted. Opts: errors=remount-ro,commit=0
> _______________________________________________
> linux-pm mailing list
> linux-pm@lists.linux-foundation.org
> https://lists.linux-foundation.org/mailman/listinfo/linux-pm
> 
> 

Re: WARNING: at kref_get

[Jim Rees]

Rafael J. Wysocki wrote:

  On Thursday, March 10, 2011, Jim Rees wrote:
  > Was there ever a resolution to this bug?
  
  Do you still see the warning in 2.6.38-rc8?

I will try it and get back to you.

Re: WARNING: at kref_get

[Jim Rees]

Rafael J. Wysocki wrote:

  On Thursday, March 10, 2011, Jim Rees wrote:
  > Was there ever a resolution to this bug?
  
  Do you still see the warning in 2.6.38-rc8?

I won't be able to test it, rc8 is unusable for other reasons.  My
orinoco_cs won't resume after suspend.  I put a dmesg here in case you're
interested:

http://jim.rees.org/x40-38-rc8.log

Re: WARNING: at kref_get

[Rafael J. Wysocki]

On Friday, March 11, 2011, Jim Rees wrote:
> Rafael J. Wysocki wrote:
> 
>   On Thursday, March 10, 2011, Jim Rees wrote:
>   > Was there ever a resolution to this bug?
>   
>   Do you still see the warning in 2.6.38-rc8?
> 
> I won't be able to test it, rc8 is unusable for other reasons.  My
> orinoco_cs won't resume after suspend.  I put a dmesg here in case you're
> interested:
> 
> http://jim.rees.org/x40-38-rc8.log

PCMCIA resume problem have been reported already, but the root cause is
unknown.  It looks like the driver's resume callback is never executed.

Thanks,
Rafael

Re: WARNING: at kref_get

[Jim Rees]

Rafael J. Wysocki wrote:

  PCMCIA resume problem have been reported already, but the root cause is
  unknown.  It looks like the driver's resume callback is never executed.

Thank you, if I get any more info on the kref_get problem I'll let you know.