diff options
| author | Valentin Schneider <valentin.schneider@arm.com> | 2020-08-17 14:29:54 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2020-08-19 11:49:48 +0300 |
| commit | 6f349818621dff364fc000909135d0065e9756c9 (patch) | |
| tree | 4f55998340761dab4a8e759560cbb92fc9df521b /kernel/sched/topology.c | |
| parent | 4ee4ea443a5dc3fc4d8ae338199676eae9d8ef02 (diff) | |
| download | linux-6f349818621dff364fc000909135d0065e9756c9.tar.xz | |
sched/topology: Use prebuilt SD flag degeneration mask
Leverage SD_DEGENERATE_GROUPS_MASK in sd_degenerate() and
sd_parent_degenerate().
Suggested-by: Peter Zijlstra <peterz@infradead.org>
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/20200817113003.20802-9-valentin.schneider@arm.com
Diffstat (limited to 'kernel/sched/topology.c')
| -rw-r--r-- | kernel/sched/topology.c | 20 |
1 files changed, 4 insertions, 16 deletions
diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c index cbdaf084ff32..38e6671c3bd7 100644 --- a/kernel/sched/topology.c +++ b/kernel/sched/topology.c @@ -160,15 +160,9 @@ static int sd_degenerate(struct sched_domain *sd) return 1; /* Following flags need at least 2 groups */ - if (sd->flags & (SD_BALANCE_NEWIDLE | - SD_BALANCE_FORK | - SD_BALANCE_EXEC | - SD_SHARE_CPUCAPACITY | - SD_ASYM_CPUCAPACITY | - SD_SHARE_PKG_RESOURCES)) { - if (sd->groups != sd->groups->next) - return 0; - } + if ((sd->flags & SD_DEGENERATE_GROUPS_MASK) && + (sd->groups != sd->groups->next)) + return 0; /* Following flags don't use groups */ if (sd->flags & (SD_WAKE_AFFINE)) @@ -190,13 +184,7 @@ sd_parent_degenerate(struct sched_domain *sd, struct sched_domain *parent) /* Flags needing groups don't count if only 1 group in parent */ if (parent->groups == parent->groups->next) { - pflags &= ~(SD_BALANCE_NEWIDLE | - SD_BALANCE_FORK | - SD_BALANCE_EXEC | - SD_ASYM_CPUCAPACITY | - SD_SHARE_CPUCAPACITY | - SD_SHARE_PKG_RESOURCES | - SD_PREFER_SIBLING); + pflags &= ~(SD_DEGENERATE_GROUPS_MASK | SD_PREFER_SIBLING); if (nr_node_ids == 1) pflags &= ~SD_SERIALIZE; } |