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Subject[PATCH 5/5] sched/isolation: Document "nohz_offload" flag
Document the interface to offload the 1Hz scheduler tick in full
dynticks mode. Also improve the comment about the existing "nohz" flag
in order to differentiate its behaviour.

Signed-off-by: Frederic Weisbecker <>
Cc: Chris Metcalf <>
Cc: Christoph Lameter <>
Cc: Luiz Capitulino <>
Cc: Mike Galbraith <>
Cc: Paul E. McKenney <>
Cc: Peter Zijlstra <>
Cc: Rik van Riel <>
Cc: Thomas Gleixner <>
Cc: Wanpeng Li <>
Cc: Ingo Molnar <>
Documentation/admin-guide/kernel-parameters.txt | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index af7104a..2524296 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -1749,7 +1749,12 @@
specified in the flag list (default: domain):

- Disable the tick when a single task runs.
+ Disable the tick when a single task runs. A residual 1Hz
+ tick remains to maintain scheduler stats alive.
+ nohz_offload
+ Like nohz but the residual 1Hz tick is offloaded to
+ housekeeping CPUs, leaving the CPU free of any tick if
+ nothing else requests it.
Isolate from the general SMP balancing and scheduling
algorithms. Note that performing domain isolation this way
 \ /
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