From f88ffa66d1b4af17dca3e7c17955c096317c75e1 Mon Sep 17 00:00:00 2001
From: Stewart Smith <stewart@linux.vnet.ibm.com>
Date: Thu, 8 Mar 2018 20:15:06 -0600
Subject: cpu_idle_job: relax a bit

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@linux.vnet.ibm.com>
---
 core/cpu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/core/cpu.c b/core/cpu.c
index 4914d30..e243344 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();
-- 
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