diff options
| author | Valentin Schneider <valentin.schneider@arm.com> | 2020-08-17 12:29:59 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2020-08-19 10:49:49 +0200 |
| commit | bdb7c802cc0a7e21f5223dc3ce41b7ac220c576e (patch) | |
| tree | a906c4074069218fe76e078c0ed28c0120ae0c50 /include/linux/sched/sd_flags.h | |
| parent | 94b858fea1f2246a2fb7f7af21840fd14ced028f (diff) | |
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: 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/20200817113003.20802-14-valentin.schneider@arm.com
Diffstat (limited to 'include/linux/sched/sd_flags.h')
| -rw-r--r-- | include/linux/sched/sd_flags.h | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/include/linux/sched/sd_flags.h b/include/linux/sched/sd_flags.h index 729510a291b2..b7f4d80e338e 100644 --- a/include/linux/sched/sd_flags.h +++ b/include/linux/sched/sd_flags.h @@ -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 |