From 99e9d958726c04cec3e36902d8583fdd8cb5b1bb Mon Sep 17 00:00:00 2001 From: John Kacur Date: Fri, 17 Jun 2016 15:05:15 +0200 Subject: [PATCH] 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 Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/1466168715-8410-1-git-send-email-jkacur@redhat.com Signed-off-by: Ingo Molnar --- Documentation/filesystems/proc.txt | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt index e8d00759bfa5..5b61eeae3f6e 100644 --- a/Documentation/filesystems/proc.txt +++ b/Documentation/filesystems/proc.txt @@ -725,7 +725,7 @@ IRQ, you can set it by doing: > echo 1 > /proc/irq/10/smp_affinity 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: -- 2.20.1