genirq: Add IRQ affinity notifiers

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When initiating I/O on a multiqueue and multi-IRQ device, we may want
to select a queue for which the response will be handled on the same
or a nearby CPU.  This requires a reverse-map of IRQ affinity.  Add a
notification mechanism to support this.

This is based closely on work by Thomas Gleixner <tglx@linutronix.de>.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Cc: linux-net-drivers@solarflare.com
Cc: Tom Herbert <therbert@google.com>
Cc: David Miller <davem@davemloft.net>
LKML-Reference: <1295470904.11126.84.camel@bwh-desktop>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

...

This commit is contained in:

Ben Hutchings 2011-01-19 21:01:44 +00:00 • committed by Thomas Gleixner

parent 1bae4ce27c

commit cd7eab44e9

3 changed files with 117 additions and 1 deletions

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33

include/linux/interrupt.h

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3

include/linux/irqdesc.h

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82

kernel/irq/manage.c

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