Re: Tracing IRQ-flags
From: Steven Rostedt
Date: Sun Sep 27 2015 - 12:52:04 EST
On Sun, 27 Sep 2015 15:25:41 +0200
Sedat Dilek <sedat.dilek@xxxxxxxxx> wrote:
> Hi Ingo, Hi Steven,
> I am still fighting with a llvmlinux problem in the area...
> workqueue | hid | irq-flags (hardirqs/sofirqs disabled) | whatever?!
> ...(see ).
> [ 24.705463] BUG: sleeping function called from invalid context at
> [ 24.705576] in_atomic(): 0, irqs_disabled(): 1, pid: 1447, name: acpid
> Several people had ideas where to look at - Thanks.
> Finally, Jiri encouraged me to try with a ftrace graph trace (see ).
Actually, if you are looking for where interrupts were disabled last
before triggering the "sleeping function called from invalid context",
lockdep, not ftrace, would be your better bet.
Enable lockdep with CONFIG_PROVE_LOCKING. It will give you better
information about where the last irq was disabled.
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