Commit 99e9d958 authored Jun 17, 2016 by John Kacur Committed by Ingo Molnar Jul 10, 2016

irq/Documentation: Correct result of echnoing 5 to smp_affinity



This command:

  echo 5 > /proc/irq/10/smp_affinity

means only the first and third (not fourth) CPUs can handle irqs
That is, CPU0 is the first CPU and CPU2 is the third cpu

Signed-off-by: John Kacur <jkacur@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1466168715-8410-1-git-send-email-jkacur@redhat.com


Signed-off-by: Ingo Molnar <mingo@kernel.org>

parent b79efd34

Documentation/filesystems/proc.txt

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -725,7 +725,7 @@ IRQ, you can set it by doing:
	> echo 1 > /proc/irq/10/smp_affinity		> echo 1 > /proc/irq/10/smp_affinity

	This means that only the first CPU will handle the IRQ, but you can also echo		This means that only the first CPU will handle the IRQ, but you can also echo
	5 which means that only the first and fourth CPU can handle the IRQ.		5 which means that only the first and third CPU can handle the IRQ.

	The contents of each smp_affinity file is the same by default:		The contents of each smp_affinity file is the same by default: