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Message-Id: <20211201071852.3568489-1-tarumizu.kohei@fujitsu.com>
Date: Wed, 1 Dec 2021 16:18:52 +0900
From: Kohei Tarumizu <tarumizu.kohei@...itsu.com>
To: linux-kernel@...r.kernel.org, riel@...hat.com,
mchehab+huawei@...nel.org, will@...nel.org,
catalin.marinas@....com, gregkh@...uxfoundation.org,
corbet@....net, ionela.voinescu@....com, pcc@...gle.com,
bilbao@...edu, matorola@...il.com, rafael@...nel.org
Cc: tarumizu.kohei@...itsu.com
Subject: [PATCH] docs: document the sysfs ABI for "nohz_full" and "isolated"
Add missing documentation of sysfs ABI for "nohz_full" and "isolated".
"nohz_full" was added by commit 6570a9a1ce3a("show nohz_full cpus in
sysfs") and "isolated" was added by commit 59f30abe94bf("show isolated
cpus in sysfs"). However, there is no documentation for these
interface.
Signed-off-by: Kohei Tarumizu <tarumizu.kohei@...itsu.com>
---
Documentation/ABI/testing/sysfs-devices-system-cpu | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu
index 69c65da16dff..a9d5d87b6a41 100644
--- a/Documentation/ABI/testing/sysfs-devices-system-cpu
+++ b/Documentation/ABI/testing/sysfs-devices-system-cpu
@@ -666,3 +666,16 @@ Description: Preferred MTE tag checking mode
================ ==============================================
See also: Documentation/arm64/memory-tagging-extension.rst
+
+What: /sys/devices/system/cpu/nohz_full
+ /sys/devices/system/cpu/isolated
+Date: Apr 2015
+Contact: Linux kernel mailing list <linux-kernel@...r.kernel.org>
+Description: information about CPU isolation.
+
+ nohz_full: (RO) the list of CPUs that are in nohz_full mode.
+ These CPUs are set by boot parameter "nohz_full=".
+
+ isolated: (RO) the list of CPUs that are isolated and don't
+ participate in load balancing. These CPUs are set by
+ boot parameter "isolcpus=".
--
2.27.0
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