On Wed, 15 May 2002 20:27:20 -0400, Bart Trojanowski <bart@jukie.net> wrote:
> [-- text/plain, encoding quoted-printable, 14 lines --]
>
> Quick question for the x86 gurus:
>
> If a hardware interrupt arrives within a spin_lock_irqsave &
> spin_unlock_irqrestore will the interrupt handler associated with said
> interrupt be called immediately after the spinlock is released?
>
> I am interested in any delays, even those less then a jiffie.
The interrupt will occur when the instruction after the "sti" finishes.
That's a one assembler instruction delay, i.e. a few clock cycles.
*Which* interrupt will be serviced first, however, depends on how
many interrupt sources you have active and on the IRQ prioritization.
Ion
--
It is better to keep your mouth shut and be thought a fool,
than to open it and remove all doubt.
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This archive was generated by hypermail 2b29 : Thu May 23 2002 - 22:00:12 EST