Documentation/kernel-parameters.txt: update 'isolcpus' kernel option

cpuset can be used to move a process onto or off an isolated CPU.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 5 insertions, 3 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 1bbcaa8982b6..8a8cb0ccc5f4 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -995,13 +995,15 @@ and is between 256 and 4096 characters. It is defined in the file
                         Format:
                         <cpu number>,...,<cpu number>
                         or
-                        <cpu number>-<cpu number>  (must be a positive range in ascending order)
+                        <cpu number>-<cpu number>
+                        (must be a positive range in ascending order)
                         or a mixture
                         <cpu number>,...,<cpu number>-<cpu number>
+
                         This option can be used to specify one or more CPUs
                         to isolate from the general SMP balancing and scheduling
-                        algorithms. The only way to move a process onto or off
-                        an "isolated" CPU is via the CPU affinity syscalls.
+                        algorithms. You can move a process onto or off an
+                        "isolated" CPU via the CPU affinity syscalls or cpuset.
                         <cpu number> begins at 0 and the maximum value is
                         "number of CPUs in system - 1".