HOWTO: expand the cpumask explanation a bit
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/HOWTO b/HOWTO
index 99cbaea..7e706ab 100644
--- a/HOWTO
+++ b/HOWTO
@@ -466,7 +466,9 @@
of milliseconds.
cpumask=int Set the CPU affinity of this job. The parameter given is a
- bitmask of allowed CPU's the job may run on. See man
+ bitmask of allowed CPU's the job may run on. So if you want
+ the allowed CPUs to be 1 and 5, you would pass the decimal
+ value of (1 << 1 | 1 << 5), or 34. See man
sched_setaffinity(2). This may not work on all supported
operating systems or kernel versions.