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sched/topology: Mark SD_NUMA as SDF_NEEDS_GROUPS 

There would be no point in preserving a sched_domain with a single group
just because it has this flag set. Add it to SD_DEGENERATE_GROUPS_MASK.

Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: https://lore.kernel.org/r/20200817113003.20802-17-valentin.schneider@arm.com
This commit is contained in:
Valentin Schneider 2020-08-17 12:30:02 +01:00 committed by Ingo Molnar
parent 3551e954f5
commit 5f4a1c4ea4
1 changed files with 2 additions and 1 deletions
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3
include/linux/sched/sd_flags.h
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@ -151,5 +151,6 @@ SD_FLAG(SD_OVERLAP, SDF_SHARED_PARENT | SDF_NEEDS_GROUPS)
* Cross-node balancing
*
* SHARED_PARENT: Set for all NUMA levels above NODE.
* NEEDS_GROUPS: No point in preserving domain if it has a single group.
*/
SD_FLAG(SD_NUMA, SDF_SHARED_PARENT)
SD_FLAG(SD_NUMA, SDF_SHARED_PARENT | SDF_NEEDS_GROUPS)