diff mbox series

[v1,2/6] core/cpu: remove POWER8 IPI loop

Message ID 20210811054851.861482-3-npiggin@gmail.com
State Superseded
Headers show
Series idle synchronisation improvements | expand

Commit Message

Nicholas Piggin Aug. 11, 2021, 5:48 a.m. UTC 
POWER8 should not have to loop sending IPIs until the destination
wakes up. One should be enough.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
 core/cpu.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/core/cpu.c b/core/cpu.c
index 0dc013b5b..940b02ce4 100644
--- a/core/cpu.c
+++ b/core/cpu.c
@@ -599,10 +599,8 @@  static void reconfigure_idle_start(void)
 
 	if (proc_gen == proc_gen_p8) {
 		for_each_available_cpu(cpu) {
-			while (cpu->in_sleep || cpu->in_idle) {
+			if (cpu->in_sleep || cpu->in_idle)
 				icp_kick_cpu(cpu);
-				cpu_relax();
-			}
 		}
 	} else if (proc_gen == proc_gen_p9 || proc_gen == proc_gen_p10) {
 		for_each_available_cpu(cpu) {