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sched/topology: Remove FORCE_SD_OVERLAP

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Its an obsolete debug mechanism and future code wants to rely on
properties this undermines.

Namely, it would be good to assume that SD_OVERLAP domains have
children, but if we build the entire hierarchy with SD_OVERLAP this is
obviously false.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Peter Zijlstra 2017-04-26 17:36:41 +02:00 • committed by Ingo Molnar
parent c20e1ea4b6
commit af85596c74
2 changed files with 1 additions and 2 deletions
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1
kernel/sched/features.h
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@ -76,7 +76,6 @@ SCHED_FEAT(WARN_DOUBLE_CLOCK, false)
SCHED_FEAT(RT_PUSH_IPI, true) SCHED_FEAT(RT_PUSH_IPI, true)
#endif #endif
SCHED_FEAT(FORCE_SD_OVERLAP, false)
SCHED_FEAT(RT_RUNTIME_SHARE, true) SCHED_FEAT(RT_RUNTIME_SHARE, true)
SCHED_FEAT(LB_MIN, false) SCHED_FEAT(LB_MIN, false)
SCHED_FEAT(ATTACH_AGE_LOAD, true) SCHED_FEAT(ATTACH_AGE_LOAD, true)

2
kernel/sched/topology.c
View file

@ -1439,7 +1439,7 @@ build_sched_domains(const struct cpumask *cpu_map, struct sched_domain_attr *att
sd = build_sched_domain(tl, cpu_map, attr, sd, i); sd = build_sched_domain(tl, cpu_map, attr, sd, i);
if (tl == sched_domain_topology) if (tl == sched_domain_topology)
*per_cpu_ptr(d.sd, i) = sd; *per_cpu_ptr(d.sd, i) = sd;
if (tl->flags & SDTL_OVERLAP || sched_feat(FORCE_SD_OVERLAP)) if (tl->flags & SDTL_OVERLAP)
sd->flags |= SD_OVERLAP; sd->flags |= SD_OVERLAP;
if (cpumask_equal(cpu_map, sched_domain_span(sd))) if (cpumask_equal(cpu_map, sched_domain_span(sd)))
break; break;