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sched: Stuff the sched_domain creation in a data-structure 

In order to make the topology contruction fully dynamic, remove the
still hard-coded list of possible domains and stick them in a
data-structure.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Nick Piggin <npiggin@kernel.dk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/20110407122942.770335383@chello.nl
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2011-04-07 14:10:00 +02:00 committed by Ingo Molnar
parent d3081f52f2
commit eb7a74e6cd
1 changed files with 26 additions and 6 deletions
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32
kernel/sched.c
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@ -6843,6 +6843,16 @@ enum s_alloc {
sa_none,
};
typedef struct sched_domain *(*sched_domain_build_f)(struct s_data *d,
const struct cpumask *cpu_map, struct sched_domain_attr *attr,
struct sched_domain *parent, int cpu);
typedef const struct cpumask *(*sched_domain_mask_f)(int cpu);
struct sched_domain_topology_level {
sched_domain_build_f build;
};
/*
* Assumes the sched_domain tree is fully constructed
*/
@ -7185,6 +7195,18 @@ static struct sched_domain *__build_smt_sched_domain(struct s_data *d,
return sd;
}
static struct sched_domain_topology_level default_topology[] = {
{ __build_allnodes_sched_domain, },
{ __build_node_sched_domain, },
{ __build_cpu_sched_domain, },
{ __build_book_sched_domain, },
{ __build_mc_sched_domain, },
{ __build_smt_sched_domain, },
{ NULL, },
};
static struct sched_domain_topology_level *sched_domain_topology = default_topology;
/*
* Build sched domains for a given set of cpus and attach the sched domains
* to the individual cpus
@ -7203,13 +7225,11 @@ static int build_sched_domains(const struct cpumask *cpu_map,
/* Set up domains for cpus specified by the cpu_map. */
for_each_cpu(i, cpu_map) {
struct sched_domain_topology_level *tl;
sd = NULL;
sd = __build_allnodes_sched_domain(&d, cpu_map, attr, sd, i);
sd = __build_node_sched_domain(&d, cpu_map, attr, sd, i);
sd = __build_cpu_sched_domain(&d, cpu_map, attr, sd, i);
sd = __build_book_sched_domain(&d, cpu_map, attr, sd, i);
sd = __build_mc_sched_domain(&d, cpu_map, attr, sd, i);
sd = __build_smt_sched_domain(&d, cpu_map, attr, sd, i);
for (tl = sched_domain_topology; tl->build; tl++)
sd = tl->build(&d, cpu_map, attr, sd, i);
*per_cpu_ptr(d.sd, i) = sd;
}