Re: sleeping while atomic warning while modprobing oprofile.

[Robert Richter]

On 20.05.11 05:47:24, Robert Richter wrote:
> On 18.05.11 15:17:06, Dave Jones wrote:
> > I just saw this when after I did a 'modprobe oprofile' on my amd64 box.
> 
> Thanks for reporting this. This happens in init_ibs(). We are actually
> too strict here with disabling preemption, though we still need it.
> Will change that code.
> 
> -Robert
> 
> > 
> > 	Dave
> > 
> > BUG: sleeping function called from invalid context at mm/slub.c:824
> > in_atomic(): 1, irqs_disabled(): 0, pid: 32357, name: modprobe
> > INFO: lockdep is turned off.
> > Pid: 32357, comm: modprobe Not tainted 2.6.39-rc7+ #14
> > Call Trace:
> >  [<ffffffff8104bdc8>] __might_sleep+0x112/0x117
> >  [<ffffffff81129693>] kmem_cache_alloc_trace+0x4b/0xe7
> >  [<ffffffff81278f14>] kzalloc.constprop.0+0x29/0x2b
> >  [<ffffffff81278f4c>] pci_get_subsys+0x36/0x78
> >  [<ffffffff81022689>] ? setup_APIC_eilvt+0xfb/0x139
> >  [<ffffffff81278fa4>] pci_get_device+0x16/0x18
> >  [<ffffffffa06c8b5d>] op_amd_init+0xd3/0x211 [oprofile]
> >  [<ffffffffa064d000>] ? 0xffffffffa064cfff
> >  [<ffffffffa064d298>] op_nmi_init+0x21e/0x26a [oprofile]
> >  [<ffffffffa064d062>] oprofile_arch_init+0xe/0x26 [oprofile]
> >  [<ffffffffa064d010>] oprofile_init+0x10/0x42 [oprofile]
> >  [<ffffffff81002099>] do_one_initcall+0x7f/0x13a
> >  [<ffffffff81096524>] sys_init_module+0x132/0x281
> >  [<ffffffff814cc682>] system_call_fastpath+0x16/0x1b

Dave,

the patch below should fix this.

-Robert