Re: 2.6.30 enabling cpu1 on resume fails after suspend to memory

From: Rafael J. Wysocki
Date: Sun Jun 14 2009 - 08:15:22 EST

On Sunday 14 June 2009, Thomas Gleixner wrote:
> On Sun, 14 Jun 2009, Rafael J. Wysocki wrote:
> > Evidently, the change of the interrupt handling during suspend-resume,
> > commit 2ed8d2b3a81bdbb0418301628ccdb008ac9f40b7 (PM: Rework handling of
> > interrupts during suspend-resume) broke resume (specifically, the enabling of
> > nonboot CPUs) on the Benjamin's machine, but only if MSI support is enabled.
> > Also, resume works if suspend_device_irqs() and resume_device_irqs() in
> > drivers/base/power/main.c are commented out.
> >
> > Is there anything the MSI code does in __enable_irq() and/or __disable_irq()
> > that might cause this problem to appear?
> Not that I'm aware of. Which of the devices is using MSI ? Have to
> tried to skip only the MSI ones in suspend/resume_device_irqs() ?

Good idea.

Benjamin, please send /proc/interrupts from your system.

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