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>

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 1bbcaa8982b6c2445fcfdd852f9e33702129cd8b..8a8cb0ccc5f4e2c7515a00cb861882f88771c85a 100644 (file)
--- 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
                        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>
                        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
                        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".
 
                        <cpu number> begins at 0 and the maximum value is
                        "number of CPUs in system - 1".