From e1235d6853eea48c2a787a00c765f5e5a6977c47 Mon Sep 17 00:00:00 2001 From: Phil Auld Date: Mon, 15 Jul 2024 09:51:53 -0400 Subject: [PATCH] docs: cgroup-v1: Clarify that domain levels are system-specific JIRA: https://issues.redhat.com/browse/RHEL-48226 commit 0f1c74befa656305ecc85c954dc31f84c1cc26e1 Author: Vitalii Bursov Date: Tue Apr 30 18:05:25 2024 +0300 docs: cgroup-v1: Clarify that domain levels are system-specific Add a clarification that domain levels are system-specific and where to check for system details. Signed-off-by: Vitalii Bursov Signed-off-by: Ingo Molnar Reviewed-by: Valentin Schneider Acked-by: Vincent Guittot Link: https://lore.kernel.org/r/42b177a2e897cdf880caf9c2025f5b609e820334.1714488502.git.vitaly@bursov.com Signed-off-by: Phil Auld --- Documentation/admin-guide/cgroup-v1/cpusets.rst | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/Documentation/admin-guide/cgroup-v1/cpusets.rst b/Documentation/admin-guide/cgroup-v1/cpusets.rst index 5d844ed4df69..6229a83eeb43 100644 --- a/Documentation/admin-guide/cgroup-v1/cpusets.rst +++ b/Documentation/admin-guide/cgroup-v1/cpusets.rst @@ -568,7 +568,7 @@ on the next tick. For some applications in special situation, waiting The 'cpuset.sched_relax_domain_level' file allows you to request changing this searching range as you like. This file takes int value which -indicates size of searching range in levels ideally as follows, +indicates size of searching range in levels approximately as follows, otherwise initial value -1 that indicates the cpuset has no request. ====== =========================================================== @@ -581,6 +581,11 @@ otherwise initial value -1 that indicates the cpuset has no request. 5 search system wide [on NUMA system] ====== =========================================================== +Not all levels can be present and values can change depending on the +system architecture and kernel configuration. Check +/sys/kernel/debug/sched/domains/cpu*/domain*/ for system-specific +details. + The system default is architecture dependent. The system default can be changed using the relax_domain_level= boot parameter.