sched/isolation: Document boot parameters dependency on CONFIG_CPU_ISOLATION=y

The "isolcpus=" and "nohz_full=" boot parameters depend on CPU Isolation
support. Let's document that.

Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Luiz Capitulino <lcapitulino@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wanpeng Li <kernellwp@gmail.com>
Cc: kernel test robot <xiaolong.ye@intel.com>
Link: http://lkml.kernel.org/r/1513275507-29200-4-git-send-email-frederic@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/Documentation/admin-guide/kernel-parameters.rst b/Documentation/admin-guide/kernel-parameters.rst
index b2598cc9834c3cbacfd9b3b1d885ed69c4c4c133..7242cbda15dd3bf8c4debea387ff2c8e376aeb60 100644 (file)
--- a/Documentation/admin-guide/kernel-parameters.rst
+++ b/Documentation/admin-guide/kernel-parameters.rst
@@ -109,6 +109,7 @@ parameter is applicable::
        IPV6    IPv6 support is enabled.
        ISAPNP  ISA PnP code is enabled.
        ISDN    Appropriate ISDN support is enabled.
+       ISOL    CPU Isolation is enabled.
        JOY     Appropriate joystick support is enabled.
        KGDB    Kernel debugger support is enabled.
        KVM     Kernel Virtual Machine support is enabled.

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 6571fbfdb2a1527c25b3a01e9c4228c84adce639..168310707ec2cdaf0a2d14e6a381e54d05b90a42 100644 (file)
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -1737,7 +1737,7 @@
        isapnp=         [ISAPNP]
                        Format: <RDP>,<reset>,<pci_scan>,<verbosity>
 
-       isolcpus=       [KNL,SMP] Isolate a given set of CPUs from disturbance.
+       isolcpus=       [KNL,SMP,ISOL] Isolate a given set of CPUs from disturbance.
                        [Deprecated - use cpusets instead]
                        Format: [flag-list,]<cpu-list>
 
@@ -2662,7 +2662,7 @@
                        Valid arguments: on, off
                        Default: on
 
-       nohz_full=      [KNL,BOOT]
+       nohz_full=      [KNL,BOOT,SMP,ISOL]
                        The argument is a cpu list, as described above.
                        In kernels built with CONFIG_NO_HZ_FULL=y, set
                        the specified list of CPUs whose tick will be stopped