Disable MWAIT again, this time on both i386 and amd64. Too many systems

run excessively hot with it to have it on by default, and I still don't
have good logic to let acpicpu enable it when the AML says it's good.

diff --git a/sys/arch/amd64/amd64/cpu.c b/sys/arch/amd64/amd64/cpu.c
index 641dea3..449161c 100644 (file)
--- a/sys/arch/amd64/amd64/cpu.c
+++ b/sys/arch/amd64/amd64/cpu.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: cpu.c,v 1.72 2014/12/12 16:51:32 tedu Exp $   */
+/*     $OpenBSD: cpu.c,v 1.73 2014/12/14 05:04:49 guenther Exp $       */
 /* $NetBSD: cpu.c,v 1.1 2003/04/26 18:39:26 fvdl Exp $ */
 
 /*-
@@ -359,6 +359,8 @@ cpu_init_mwait(struct cpu_softc *sc)
        else
                mwait_size = largest;
        printf("\n");
+       /* XXX disable mwait: ACPI says not to use it on too many systems */
+       mwait_size = 0;
 }
 
 void

diff --git a/sys/arch/i386/i386/cpu.c b/sys/arch/i386/i386/cpu.c
index 728fa81..9c99e8c 100644 (file)
--- a/sys/arch/i386/i386/cpu.c
+++ b/sys/arch/i386/i386/cpu.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: cpu.c,v 1.57 2014/11/16 12:30:57 deraadt Exp $        */
+/*     $OpenBSD: cpu.c,v 1.58 2014/12/14 05:04:49 guenther Exp $       */
 /* $NetBSD: cpu.c,v 1.1.2.7 2000/06/26 02:04:05 sommerfeld Exp $ */
 
 /*-
@@ -833,6 +833,8 @@ cpu_init_mwait(struct device *dv)
        else
                mwait_size = largest;
        printf("\n");
+       /* XXX disable mwait: ACPI says not to use it on too many systems */
+       mwait_size = 0;
 }
 
 void