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numa: Reject configuration if CPU appears on multiple nodes 

Each CPU can appear in only one NUMA node on the NUMA config. Reject
configuration if a CPU appears in multiple nodes.

Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
This commit is contained in:
Eduardo Habkost 2015-02-09 17:32:04 -02:00
parent 8979c945c1
commit 3ef7197505
1 changed files with 37 additions and 0 deletions
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37
numa.c
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@ -167,6 +167,41 @@ error:
return -1;
}
static char *enumerate_cpus(unsigned long *cpus, int max_cpus)
{
int cpu;
bool first = true;
GString *s = g_string_new(NULL);
for (cpu = find_first_bit(cpus, max_cpus);
cpu < max_cpus;
cpu = find_next_bit(cpus, max_cpus, cpu + 1)) {
g_string_append_printf(s, "%s%d", first ? "" : " ", cpu);
first = false;
}
return g_string_free(s, FALSE);
}
static void validate_numa_cpus(void)
{
int i;
DECLARE_BITMAP(seen_cpus, MAX_CPUMASK_BITS);
bitmap_zero(seen_cpus, MAX_CPUMASK_BITS);
for (i = 0; i < nb_numa_nodes; i++) {
if (bitmap_intersects(seen_cpus, numa_info[i].node_cpu,
MAX_CPUMASK_BITS)) {
bitmap_and(seen_cpus, seen_cpus,
numa_info[i].node_cpu, MAX_CPUMASK_BITS);
error_report("CPU(s) present in multiple NUMA nodes: %s",
enumerate_cpus(seen_cpus, max_cpus));;
exit(EXIT_FAILURE);
}
bitmap_or(seen_cpus, seen_cpus,
numa_info[i].node_cpu, MAX_CPUMASK_BITS);
}
}
void parse_numa_opts(void)
{
int i;
@ -244,6 +279,8 @@ void parse_numa_opts(void)
set_bit(i, numa_info[i % nb_numa_nodes].node_cpu);
}
}
validate_numa_cpus();
}
}