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| -rw-r--r-- | Documentation/scheduler/sched-domains.rst | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/Documentation/scheduler/sched-domains.rst b/Documentation/scheduler/sched-domains.rst index f7504226f445..5c4b7f4f0062 100644 --- a/Documentation/scheduler/sched-domains.rst +++ b/Documentation/scheduler/sched-domains.rst @@ -19,10 +19,12 @@ CPUs". Each scheduling domain must have one or more CPU groups (struct sched_group) which are organised as a circular one way linked list from the ->groups pointer. The union of cpumasks of these groups MUST be the same as the -domain's span. The intersection of cpumasks from any two of these groups -MUST be the empty set. The group pointed to by the ->groups pointer MUST -contain the CPU to which the domain belongs. Groups may be shared among -CPUs as they contain read only data after they have been set up. +domain's span. The group pointed to by the ->groups pointer MUST contain the CPU +to which the domain belongs. Groups may be shared among CPUs as they contain +read only data after they have been set up. The intersection of cpumasks from +any two of these groups may be non empty. If this is the case the SD_OVERLAP +flag is set on the corresponding scheduling domain and its groups may not be +shared between CPUs. Balancing within a sched domain occurs between groups. That is, each group is treated as one entity. The load of a group is defined as the sum of the |