From acb0c2057952fa8bb502bf6b4222b327efe44c4c Mon Sep 17 00:00:00 2001
From: Kairui Song <kasong@redhat.com>
Date: Mon, 26 Oct 2020 17:26:52 +0800
Subject: [PATCH] Add some examples for IRQBALANCE_BANNED_CPUS

Signed-off-by: Kairui Song <kasong@redhat.com>
---
 irqbalance.1 | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/irqbalance.1 b/irqbalance.1
index d272b6f..330c12b 100644
--- a/irqbalance.1
+++ b/irqbalance.1
@@ -157,6 +157,13 @@ Same as --debug.
 Provides a mask of CPUs which irqbalance should ignore and never assign interrupts to.
 If not specified, irqbalance use mask of isolated and adaptive-ticks CPUs on the
 system as the default value.
+This is a hexmask without the leading ’0x’. On systems with large numbers of
+processors, each group of eight hex digits is separated by a comma ’,’. i.e.
+‘export IRQBALANCE_BANNED_CPUS=fc0‘ would prevent irqbalance from assigning irqs
+to the 7th-12th cpus (cpu6-cpu11) or ‘export IRQBALANCE_BANNED_CPUS=ff000000,00000001‘
+would prevent irqbalance from assigning irqs to the 1st (cpu0) and 57th-64th cpus
+(cpu56-cpu63).
+
 
 .SH "SIGNALS"
 .TP
-- 
2.28.0