redonkable/alistair23-linux
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sparc64: Set cpu state to offline when stopped

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CPU needs to be marked offline before stopping it. When not marked
offline, the xcall receives HV_EWOULDBLOCK and so assumes that not all
CPUs received the message, and retries. After 10000 retries, it finally
fails with fatal mondo timeout.

Signed-off-by: Vijay Kumar <vijay.ac.kumar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vijay Kumar 2017-02-01 11:34:37 -08:00 committed by David S. Miller
parent f41e54616c
commit cffb3e7681
1 changed files with 3 additions and 0 deletions
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3
arch/sparc/kernel/smp_64.c
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@ -1443,6 +1443,7 @@ void __irq_entry smp_receive_signal_client(int irq, struct pt_regs *regs)
static void stop_this_cpu(void *dummy)
{
set_cpu_online(smp_processor_id(), false);
prom_stopself();
}
@ -1454,6 +1455,8 @@ void smp_send_stop(void)
for_each_online_cpu(cpu) {
if (cpu == smp_processor_id())
continue;
set_cpu_online(cpu, false);
#ifdef CONFIG_SUN_LDOMS
if (ldom_domaining_enabled) {
unsigned long hv_err;