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| author | Viresh Kumar <viresh.kumar@linaro.org> | 2013-06-04 15:41:15 +0530 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-06-19 12:58:43 +0200 |
| commit | 22da956953f371c1ee7a578c31ed8c5702cb52b1 (patch) | |
| tree | 3b50759bd7e0a269c1db2f2b018c96107fc72e13 /kernel/sched | |
| parent | 4a850cbefa9592ddde3670a41c10c9576a657c43 (diff) | |
| download | linux-22da956953f371c1ee7a578c31ed8c5702cb52b1.tar.bz2 | |
sched: Optimize build_sched_domains() for saving first SD node for a cpu
We are saving first scheduling domain for a cpu in build_sched_domains() by
iterating over the nested sd->child list. We don't actually need to do it this
way.
tl will be equal to sched_domain_topology for the first iteration and so we can
set *per_cpu_ptr(d.sd, i) based on that. So, save pointer to first SD while
running the iteration loop over tl's.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/fc473527cbc4dfa0b8eeef2a59db74684eb59a83.1370436120.git.viresh.kumar@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/core.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 342e74419f8f..137dcc03f66d 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -5985,16 +5985,13 @@ static int build_sched_domains(const struct cpumask *cpu_map, sd = NULL; for (tl = sched_domain_topology; tl->init; tl++) { sd = build_sched_domain(tl, cpu_map, attr, sd, i); + if (tl == sched_domain_topology) + *per_cpu_ptr(d.sd, i) = sd; if (tl->flags & SDTL_OVERLAP || sched_feat(FORCE_SD_OVERLAP)) sd->flags |= SD_OVERLAP; if (cpumask_equal(cpu_map, sched_domain_span(sd))) break; } - - while (sd->child) - sd = sd->child; - - *per_cpu_ptr(d.sd, i) = sd; } /* Build the groups for the domains */ |