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irq/Documentation: Correct result of echnoing 5 to smp_affinity

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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>
This commit is contained in:
John Kacur 2016-06-17 15:05:15 +02:00 committed by Ingo Molnar
parent b79efd3453
commit 99e9d95872
1 changed files with 1 additions and 1 deletions
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Documentation/filesystems/proc.txt
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@ -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: