Re: [linux-pm] swsusp regression [Was: 2.6.17-mm1]

[Frederik Deweerdt <deweerdt@free.fr>]

On Thu, Jun 22, 2006 at 09:25:06AM -0700, Andrew Morton wrote:
> On Thu, 22 Jun 2006 18:04:03 +0200
> Frederik Deweerdt <deweerdt@free.fr> wrote:
> 
> > Thu, Jun 22, 2006 at 12:46:48AM -0700, Andrew Morton wrote:
> > > I can bisect it if we're stuck, but that'll require beer or something.
> > 
> > FWIW, my laptop (Dell D610) gave the following results:
> > 2.6.17-mm1: suspend_device(): usb_generic_suspend+0x0/0x135 [usbcore]() returns -16
> > 2.6.17+origin.patch: suspend_device(): usb_generic_suspend+0x0/0x135 [usbcore]() returns -16
> 
> So it's in mainline already - hence it's some recently-written thing which
> was not tested in rc6-mm2.
> 
> > 2.6.17: oops
> > 2.6.17.1: oops
> 
> 2.6.17 wasn't supposed to oops.  Do you have details on this?
> 
For some reason, unknown to me, the oops won't display on the serial link :(.

Here's what I could hand copy (I've suppressed printk timing information):
x1b9/0x1be
<c0166e6b> sys_write+0x4b/0x75  <c010300f> sysenter_past_esp+0x54/0x75
Code: 05 c4 52 43 c0 31 53 43 c0 c3 8b 2d 68 6e 54 c0 8b 1d 60
6e 54 c0 8b 35 6c 6e 54 c0 8b 3d 70 6e 54 c0 ff 35 74 6e 54 c0 9d c3 90 <e8>
9d 2c ea ff e8 a2 ff ff ff 6a 03 e8 4c ab de ff 83 c4 04 c3
EIP: [<c043531c>] do_suspend_lowlevel+0x0/0x15 SS:ESP 0068:f7a0fea4
<3>BUG: sleeping function called from invalid context at include/linux/rwsem.h:43
in_atomic():0, irqs_disabled():1
 <c0103e56> show_trace+0x20/0x22  <c0103f5b> dump_stack+0x1e/0x20
 <c011aec7> __might_sleep+0x9e/0xa6  <c012b0cf> blocking_notifier_call_chain+0x1e/0x5b
 <c011f091> profile_task_exit+0x21/0x23  <c0120946> do_exit+0x1d/0x483
 <c0104432> do_divide_error+0x0/0xbf  <c0362c76> do_page_fault+0x3c4/0x752
 <c0103b2f> error_code+0x4f/0x54  <c013b33a> suspend_enter+0x2f/0x52
 <c013b3e0> enter_state+0x4b/0x8d  <c013b579> state_store+0xa0/0xa2
 <c01a54f1> subsys_attr_store+0x37/0x41  <c01a5772> flush_write_buffer+0x3c/046
 <c01a57e3> sysfs_write_file+0x67/0x8b  <c0166da6> vfs_write+0x1b9/0x1be
 <c0166e6b> sys_write+0x4b/0x75  <c010300f> sysenter_past_esp+0x54/0x75

This is triggered on a 2.6.17.1 kernel by:
echo mem > /sys/power/state

.config and dmesg are here:
http://fdeweerdt.free.fr/suspend_oops/

Regards,
Frederik