RE: [PATCH 2/2] x86_64 irq: Handle irqs pending in IRR duringirq migration.

[Lu, Yinghai]

-----Original Message-----
From: ebiederm@xxxxxxxxxxxx [mailto:ebiederm@xxxxxxxxxxxx] 
Sent: Monday, February 05, 2007 3:03 PM
>Nope. irq routines are a stack.  if apic_in_service_vector could return
>the wrong value.  ack_APIC_irq() which use the same information would
>acknowledge the wrong irq.  If there was actually any danger of
>mis-computing that information I would just pass it from the interrupt
>service routine stash it in a per cpu variable and then read it out.
>But the apic already has registers doing that, so I was lazy and used
>what was available.  It should be the common case that we need that
>information.

OK.

I wonder if current kernel support different cpu handle irq request for
different device at the same time.

YH


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