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Subject[PATCH v2 1/4] sparc64: Set cpu state to offline when stopped
Date
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>
---
arch/sparc/kernel/smp_64.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/arch/sparc/kernel/smp_64.c b/arch/sparc/kernel/smp_64.c
index d3035ba..14138ad 100644
--- a/arch/sparc/kernel/smp_64.c
+++ b/arch/sparc/kernel/smp_64.c
@@ -1435,6 +1435,7 @@ 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();
}

@@ -1446,6 +1447,8 @@ 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;
--
1.7.1
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