The memory allocated in setup_cpu_sibling_map() when a CPU is hotplugged
has to be freed when the CPU is hot-unplugged. This is done in
remove_cpu_sibling_map() and called from __cpu_disable() on CPU hot-unplug.
Signed-off-by: Mirela Simonovic <mirela.simono...@aggios.com>
---
CC: Stefano Stabellini <sstabell...@kernel.org>
CC: Julien Grall <julien.gr...@arm.com>
---
xen/arch/arm/smpboot.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/xen/arch/arm/smpboot.c b/xen/arch/arm/smpboot.c
index b4ed479dc6..d01b51592d 100644
--- a/xen/arch/arm/smpboot.c
+++ b/xen/arch/arm/smpboot.c
@@ -89,6 +89,12 @@ static void setup_cpu_sibling_map(int cpu)
cpumask_set_cpu(cpu, per_cpu(cpu_core_mask, cpu));
}
+static void remove_cpu_sibling_map(int cpu)
+{
+ free_cpumask_var(per_cpu(cpu_sibling_mask, cpu));
+ free_cpumask_var(per_cpu(cpu_core_mask, cpu));
+}
+
void __init
smp_clear_cpu_maps (void)
{
@@ -391,6 +397,8 @@ void __cpu_disable(void)
/* It's now safe to remove this processor from the online map */
cpumask_clear_cpu(cpu, &cpu_online_map);
+ remove_cpu_sibling_map(cpu);
+
if ( cpu_disable_scheduler(cpu) )
BUG();
smp_mb();
--
2.13.0
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