diff options
| author | Valentin Schneider <valentin.schneider@arm.com> | 2020-08-17 12:29:47 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2020-08-19 10:49:47 +0200 |
| commit | cfe7ddcbd72dc67ce5749cc6f451a2b0c6aec5b5 (patch) | |
| tree | 250731cb814274a4d6726ca560cc08677cd9eeee | |
| parent | 18445bf405cb331117bc98427b1ba6f12418ad17 (diff) | |
| download | linux-cfe7ddcbd72dc67ce5749cc6f451a2b0c6aec5b5.tar.bz2 | |
ARM, sched/topology: Remove SD_SHARE_POWERDOMAIN
This flag was introduced in 2014 by commit:
d77b3ed5c9f8 ("sched: Add a new SD_SHARE_POWERDOMAIN for sched_domain")
but AFAIA it was never leveraged by the scheduler. The closest thing I can
think of is EAS caring about frequency domains, and it does that by
leveraging performance domains.
Remove the flag. No change in functionality is expected.
Suggested-by: Morten Rasmussen <morten.rasmussen@arm.com>
Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: https://lore.kernel.org/r/20200817113003.20802-2-valentin.schneider@arm.com
| -rw-r--r-- | arch/arm/kernel/topology.c | 2 | ||||
| -rw-r--r-- | include/linux/sched/topology.h | 13 | ||||
| -rw-r--r-- | kernel/sched/topology.c | 10 |
3 files changed, 10 insertions, 15 deletions
diff --git a/arch/arm/kernel/topology.c b/arch/arm/kernel/topology.c index b5adaf744630..353f3ee660e4 100644 --- a/arch/arm/kernel/topology.c +++ b/arch/arm/kernel/topology.c @@ -243,7 +243,7 @@ topology_populated: static inline int cpu_corepower_flags(void) { - return SD_SHARE_PKG_RESOURCES | SD_SHARE_POWERDOMAIN; + return SD_SHARE_PKG_RESOURCES; } static struct sched_domain_topology_level arm_topology[] = { diff --git a/include/linux/sched/topology.h b/include/linux/sched/topology.h index 820511289857..6ec7d7c1d1e3 100644 --- a/include/linux/sched/topology.h +++ b/include/linux/sched/topology.h @@ -18,13 +18,12 @@ #define SD_WAKE_AFFINE 0x0010 /* Wake task to waking CPU */ #define SD_ASYM_CPUCAPACITY 0x0020 /* Domain members have different CPU capacities */ #define SD_SHARE_CPUCAPACITY 0x0040 /* Domain members share CPU capacity */ -#define SD_SHARE_POWERDOMAIN 0x0080 /* Domain members share power domain */ -#define SD_SHARE_PKG_RESOURCES 0x0100 /* Domain members share CPU pkg resources */ -#define SD_SERIALIZE 0x0200 /* Only a single load balancing instance */ -#define SD_ASYM_PACKING 0x0400 /* Place busy groups earlier in the domain */ -#define SD_PREFER_SIBLING 0x0800 /* Prefer to place tasks in a sibling domain */ -#define SD_OVERLAP 0x1000 /* sched_domains of this level overlap */ -#define SD_NUMA 0x2000 /* cross-node balancing */ +#define SD_SHARE_PKG_RESOURCES 0x0080 /* Domain members share CPU pkg resources */ +#define SD_SERIALIZE 0x0100 /* Only a single load balancing instance */ +#define SD_ASYM_PACKING 0x0200 /* Place busy groups earlier in the domain */ +#define SD_PREFER_SIBLING 0x0400 /* Prefer to place tasks in a sibling domain */ +#define SD_OVERLAP 0x0800 /* sched_domains of this level overlap */ +#define SD_NUMA 0x1000 /* cross-node balancing */ #ifdef CONFIG_SCHED_SMT static inline int cpu_smt_flags(void) diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c index 007b0a6b0152..fe0396978fea 100644 --- a/kernel/sched/topology.c +++ b/kernel/sched/topology.c @@ -148,8 +148,7 @@ static int sd_degenerate(struct sched_domain *sd) SD_BALANCE_EXEC | SD_SHARE_CPUCAPACITY | SD_ASYM_CPUCAPACITY | - SD_SHARE_PKG_RESOURCES | - SD_SHARE_POWERDOMAIN)) { + SD_SHARE_PKG_RESOURCES)) { if (sd->groups != sd->groups->next) return 0; } @@ -180,8 +179,7 @@ sd_parent_degenerate(struct sched_domain *sd, struct sched_domain *parent) SD_ASYM_CPUCAPACITY | SD_SHARE_CPUCAPACITY | SD_SHARE_PKG_RESOURCES | - SD_PREFER_SIBLING | - SD_SHARE_POWERDOMAIN); + SD_PREFER_SIBLING); if (nr_node_ids == 1) pflags &= ~SD_SERIALIZE; } @@ -1292,7 +1290,6 @@ int __read_mostly node_reclaim_distance = RECLAIM_DISTANCE; * SD_SHARE_CPUCAPACITY - describes SMT topologies * SD_SHARE_PKG_RESOURCES - describes shared caches * SD_NUMA - describes NUMA topologies - * SD_SHARE_POWERDOMAIN - describes shared power domain * * Odd one out, which beside describing the topology has a quirk also * prescribes the desired behaviour that goes along with it: @@ -1303,8 +1300,7 @@ int __read_mostly node_reclaim_distance = RECLAIM_DISTANCE; (SD_SHARE_CPUCAPACITY | \ SD_SHARE_PKG_RESOURCES | \ SD_NUMA | \ - SD_ASYM_PACKING | \ - SD_SHARE_POWERDOMAIN) + SD_ASYM_PACKING) static struct sched_domain * sd_init(struct sched_domain_topology_level *tl, |