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 <[email protected]> Cc: Chris Metcalf <[email protected]> Cc: Christoph Lameter <[email protected]> Cc: Luiz Capitulino <[email protected]> Cc: Mike Galbraith <[email protected]> Cc: Paul E. McKenney <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Rik van Riel <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Wanpeng Li <[email protected]> Cc: Ingo Molnar <[email protected]> --- 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 1683107..fcc5fd9 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -1745,7 +1745,12 @@ specified in the flag list (default: domain): nohz - 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. domain Isolate from the general SMP balancing and scheduling algorithms. Note that performing domain isolation this way -- 2.7.4
