The following commit has been merged into the sched/core branch of tip: Commit-ID: 5f4a1c4ea44728aa80be21dbf3a0469b5ca81d88 Gitweb: https://git.kernel.org/tip/5f4a1c4ea44728aa80be21dbf3a0469b5ca81d88 Author: Valentin Schneider <valentin.schneider@xxxxxxx> AuthorDate: Mon, 17 Aug 2020 12:30:02 +01:00 Committer: Ingo Molnar <mingo@xxxxxxxxxx> CommitterDate: Wed, 19 Aug 2020 10:49:50 +02:00 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@xxxxxxx> Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> Acked-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> Link: https://lore.kernel.org/r/20200817113003.20802-17-valentin.schneider@xxxxxxx --- include/linux/sched/sd_flags.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/include/linux/sched/sd_flags.h b/include/linux/sched/sd_flags.h index 29af5f0..34b21e9 100644 --- a/include/linux/sched/sd_flags.h +++ b/include/linux/sched/sd_flags.h @@ -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)
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