Commit bdb7c802 authored by Valentin Schneider's avatar Valentin Schneider Committed by Ingo Molnar
Browse files

sched/topology: Mark SD_SERIALIZE 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: default avatarValentin Schneider <valentin.schneider@arm.com>
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
Acked-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Link: https://lore.kernel.org/r/20200817113003.20802-14-valentin.schneider@arm.com
parent 94b858fe

include/linux/sched/sd_flags.h

+5 −4
Original line number Diff line number Diff line
@@ -112,11 +112,12 @@ SD_FLAG(SD_SHARE_PKG_RESOURCES, SDF_SHARED_CHILD | SDF_NEEDS_GROUPS) 
 * Only a single load balancing instance

 *

 * SHARED_PARENT: Set for all NUMA levels above NODE. Could be set from a

 * different level upwards, but it doesn't change that if a domain has this flag

 * set, then all of its parents need to have it too (otherwise the serialization

 * doesn't make sense).

 *                different level upwards, but it doesn't change that if a

 *                domain has this flag set, then all of its parents need to have

 *                it too (otherwise the serialization doesn't make sense).

 * NEEDS_GROUPS: No point in preserving domain if it has a single group.

 */

SD_FLAG(SD_SERIALIZE, SDF_SHARED_PARENT)

SD_FLAG(SD_SERIALIZE, SDF_SHARED_PARENT | SDF_NEEDS_GROUPS)



/*

 * Place busy tasks earlier in the domain

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