[Skiboot] [PATCH] cpu_idle_job: relax a bit

[Stewart Smith]

This *dramatically* improves kernel boot time with GCOV builds

from ~3minutes between loading kernel and switching the HILE
bit down to around 10 seconds.

Signed-off-by: Stewart Smith <stewart at linux.vnet.ibm.com>
---
 core/cpu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/core/cpu.c b/core/cpu.c
index 4914d3024cfe..e243344aace6 100644
--- a/core/cpu.c
+++ b/core/cpu.c
@@ -450,6 +450,7 @@ void cpu_idle_job(void)
 		while (!cpu_check_jobs(cpu)) {
 			if (pm_enabled)
 				break;
+			cpu_relax();
 			barrier();
 		}
 		smt_medium();
-- 
2.14.3