BUG: scheduling while atomic

[Arun KS]

On Wed, Apr 18, 2012 at 12:14 PM, Arun KS <getarunks at gmail.com> wrote:

>
> Hello Guys,
>
> System is working normal after this BUG.
> PC is at 0x400b4614, probably a mmaped address.
>
> Just wondering how can this BUG happen when a process is running in user
> space.
>
>
> Can it be something like this
> 1) enter to kernel from userspace through some system call.
> 2) kernel disables the interrupt and return to user space.
> 3) and now it can happen in user space?
>
> Any thoughts?
>
> shell at android: # ls
> device[   40.603515] BUG: scheduling while atomic: Binder Thread
> #/1355/0x00010003
> [   40.610290] Modules linked in:
> [   40.613342]
> [   40.614837] Pid: 1355, comm:      Binder Thread #
> [   40.619506] CPU: 0    Tainted: G        W    (3.0.15+ #174)
> [   40.625061] PC is at 0x400b4614
> [   40.628173] LR is at 0x408d83c9
> [   40.631317] pc : [<400b4614>]    lr : [<408d83c9>]    psr: 40000010
> [   40.631317] sp : 50551918  ip : 4092d1c0  fp : 505519a4
> [   40.642730] r10: 50551974  r9 : 5016de28  r8 : 1f600009
> [   40.647949] r7 : 00000000  r6 : 00000000  r5 : 5055194c  r4 : 00f09f90
> [   40.654418] r3 : 40931c58  r2 : 00000000  r1 : 00f09f90  r0 : 00000006
> [   40.660919] Flags: nZcv  IRQs on  FIQs on  Mode USER_32  ISA ARM
> Segment user
>

But if you look at the flags here,  it is showing that IRQs are on.

[   40.668121] Control: 10c53c7d  Table: 91184059  DAC: 00000015
>
> shell at android: #
> shell at android: #
> shell at android: #
>
>
>
>
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