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Commit d94d1053 authored Dec 14, 2017 by Frederic Weisbecker Committed by Ingo Molnar Dec 18, 2017

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>

parent 2c43838c

Documentation/admin-guide/kernel-parameters.rst

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -109,6 +109,7 @@ parameter is applicable::
	IPV6 IPv6 support is enabled.		IPV6 IPv6 support is enabled.
	ISAPNP ISA PnP code is enabled.		ISAPNP ISA PnP code is enabled.
	ISDN Appropriate ISDN support is enabled.		ISDN Appropriate ISDN support is enabled.
			ISOL CPU Isolation is enabled.
	JOY Appropriate joystick support is enabled.		JOY Appropriate joystick support is enabled.
	KGDB Kernel debugger support is enabled.		KGDB Kernel debugger support is enabled.
	KVM Kernel Virtual Machine support is enabled.		KVM Kernel Virtual Machine support is enabled.

Documentation/admin-guide/kernel-parameters.txt

+2 −2

Original line number	Original line	Diff line number	Diff line
	@@ -1737,7 +1737,7 @@
	isapnp= [ISAPNP]		isapnp= [ISAPNP]
	Format: <RDP>,<reset>,<pci_scan>,<verbosity>		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]		[Deprecated - use cpusets instead]
	Format: [flag-list,]<cpu-list>		Format: [flag-list,]<cpu-list>

	@@ -2662,7 +2662,7 @@
	Valid arguments: on, off		Valid arguments: on, off
	Default: on		Default: on

	nohz_full= [KNL,BOOT]		nohz_full= [KNL,BOOT,SMP,ISOL]
	The argument is a cpu list, as described above.		The argument is a cpu list, as described above.
	In kernels built with CONFIG_NO_HZ_FULL=y, set		In kernels built with CONFIG_NO_HZ_FULL=y, set
	the specified list of CPUs whose tick will be stopped		the specified list of CPUs whose tick will be stopped