[PATCH] doc: Update residual 1Hz handling description
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From: Marco Crivellari <hidden>
Date: 2026-01-12 16:39:13
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documentation, the rest · Maintainers:
Jonathan Corbet, Linus Torvalds
When a CPU is nohz there is a residual 1Hz that must be handled. Accordingly to the documentation, this should be manually affined to housekeeping. This is no longer the case: the residual 1Hz is automatically offloaded to workqueues already affined to housekeeping CPUs. So change the documentation accordingly. Signed-off-by: Marco Crivellari <redacted> --- Documentation/admin-guide/kernel-parameters.txt | 11 ++--------- 1 file changed, 2 insertions(+), 9 deletions(-)
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 902ecd92a29f..414fb42786c7 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt@@ -2368,15 +2368,8 @@ 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. + A residual 1Hz tick is offloaded to workqueues, already + affined to housekeeping CPUs. domain Isolate from the general SMP balancing and scheduling
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2.52.0