1 files changed, 25 insertions, 0 deletions

diff --git a/patches/boot_time_opt_guest/0108-use-lfence-instead-of-rep-and-nop.patch b/patches/boot_time_opt_guest/0108-use-lfence-instead-of-rep-and-nop.patch
new file mode 100644
index 0000000..463f384
--- /dev/null
+++ b/patches/boot_time_opt_guest/0108-use-lfence-instead-of-rep-and-nop.patch
@@ -0,0 +1,25 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Arjan van de Ven <arjan@linux.intel.com>
+Date: Sat, 8 Dec 2018 18:21:32 +0000
+Subject: [PATCH] use lfence instead of rep and nop
+
+---
+ arch/x86/include/asm/vdso/processor.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/arch/x86/include/asm/vdso/processor.h b/arch/x86/include/asm/vdso/processor.h
+index 57b1a7034c64..e2c45674f989 100644
+--- a/arch/x86/include/asm/vdso/processor.h
++++ b/arch/x86/include/asm/vdso/processor.h
+@@ -10,7 +10,7 @@
+ /* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
+ static __always_inline void rep_nop(void)
+ {
+-       asm volatile("rep; nop" ::: "memory");
++       asm volatile("lfence" ::: "memory");
+ }
+ 
+ static __always_inline void cpu_relax(void)
+-- 
+https://clearlinux.org
+