[PATCH v6 3/3] Documentation/x86: Documentation for MON group move feature

From: Peter Newman
Date: Wed Apr 19 2023 - 08:51:09 EST


Describe new support for moving MON groups to a new parent CTRL_MON
group and its restrictions.

Signed-off-by: Peter Newman <peternewman@xxxxxxxxxx>
Reviewed-by: Reinette Chatre <reinette.chatre@xxxxxxxxx>
---
Documentation/x86/resctrl.rst | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/Documentation/x86/resctrl.rst b/Documentation/x86/resctrl.rst
index 387ccbcb558f..cb05d90111b4 100644
--- a/Documentation/x86/resctrl.rst
+++ b/Documentation/x86/resctrl.rst
@@ -287,6 +287,13 @@ Removing a directory will move all tasks and cpus owned by the group it
represents to the parent. Removing one of the created CTRL_MON groups
will automatically remove all MON groups below it.

+Moving MON group directories to a new parent CTRL_MON group is supported
+for the purpose of changing the resource allocations of a MON group
+without impacting its monitoring data or assigned tasks. This operation
+is not allowed for MON groups which monitor CPUs. No other move
+operation is currently allowed other than simply renaming a CTRL_MON or
+MON group.
+
All groups contain the following files:

"tasks":
--
2.40.0.634.g4ca3ef3211-goog