Thread (7 messages) 7 messages, 2 authors, 2010-07-05

soft lockup - CPU#0 stuck for 61s! problem

From: Russell King - ARM Linux <hidden>
Date: 2010-06-28 10:29:31

On Mon, Jun 28, 2010 at 03:50:24PM +0530, Harishkumar V wrote:
Will capture the further messages and mail u. Why an IRQ got struck, is
their a way to handle this....
Normally, the kernel will disable the interrupt so the system can
continue to (mostly) function.

However, people like to return IRQ_HANDLED from interrupt handlers,
even when they've found nothing to do.  This prevents the kernel from
rescuing you from the stuck-IRQ problem.  Interrupt handlers are
supposed to return IRQ_HANDLED if they did something to handle the IRQ,
or IRQ_NONE if they found nothing to do.

I can't say much more than that - I've no idea what hardware you're
running the kernel on, and therefore I can't guess what IRQ92 might be.
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