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authorDan Williams <dan.j.williams@intel.com>2018-04-09 10:50:17 -0700
committerDan Williams <dan.j.williams@intel.com>2018-04-09 10:50:17 -0700
commite13e75b86ef2f88e3a47d672dd4c52a293efb95b (patch)
tree2617aebd952d1aec09d323f6b2484b93f659e753 /Documentation
parent1ed41b5696ccc3ff40a1dee39fe14eff273faf82 (diff)
parent976431b02c2ef92ae3f8b6a7d699fc554025e118 (diff)
Merge branch 'for-4.17/dax' into libnvdimm-for-next
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/admin-guide/kernel-parameters.txt11
1 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 1d1d53f85ddd..50b9837e985b 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -1766,6 +1766,17 @@
nohz
Disable the tick when a single task runs.
+
+ A residual 1Hz tick is offloaded to workqueues, which you
+ need to affine to housekeeping through the global
+ workqueue's affinity configured via the
+ /sys/devices/virtual/workqueue/cpumask sysfs file, or
+ by using the 'domain' flag described below.
+
+ NOTE: by default the global workqueue runs on all CPUs,
+ so to protect individual CPUs the 'cpumask' file has to
+ be configured manually after bootup.
+
domain
Isolate from the general SMP balancing and scheduling
algorithms. Note that performing domain isolation this way