From 9b88857f7565a426d1469e8a9b51d9bf045adc9b Mon Sep 17 00:00:00 2001
From: Shenghou Ma <minux@golang.org>
Date: Tue, 12 Aug 2014 22:28:25 -0400
Subject: [PATCH] [dev.power64] runtime: disable GC and use a larger default
 stack

LGTM=rsc
R=rsc, iant
CC=golang-codereviews
https://golang.org/cl/128120043
---
 src/pkg/runtime/malloc.go | 2 +-
 src/pkg/runtime/mgc0.c    | 4 ++++
 src/pkg/runtime/stack.h   | 2 +-
 3 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/pkg/runtime/malloc.go b/src/pkg/runtime/malloc.go
index dedcea94a6..68baa80d52 100644
--- a/src/pkg/runtime/malloc.go
+++ b/src/pkg/runtime/malloc.go
@@ -278,7 +278,7 @@ func profilealloc(mp *m, x unsafe.Pointer, size uintptr) {
 // force = 1 - do GC regardless of current heap usage
 // force = 2 - go GC and eager sweep
 func gogc(force int32) {
-	if memstats.enablegc == 0 {
+	if GOARCH == "power64" || GOARCH == "power64le" || memstats.enablegc == 0 {
 		return
 	}
 
diff --git a/src/pkg/runtime/mgc0.c b/src/pkg/runtime/mgc0.c
index e7955151ce..03622db283 100644
--- a/src/pkg/runtime/mgc0.c
+++ b/src/pkg/runtime/mgc0.c
@@ -1305,6 +1305,10 @@ runtime·gc(int32 force)
 	if(!mstats.enablegc || g == g->m->g0 || g->m->locks > 0 || runtime·panicking)
 		return;
 
+	if(thechar == '9') {
+		runtime·gcpercent = -1;
+		return;
+	}
 	if(runtime·gcpercent == GcpercentUnknown) {	// first time through
 		runtime·lock(&runtime·mheap);
 		if(runtime·gcpercent == GcpercentUnknown)
diff --git a/src/pkg/runtime/stack.h b/src/pkg/runtime/stack.h
index ee5fd351d5..64d377754f 100644
--- a/src/pkg/runtime/stack.h
+++ b/src/pkg/runtime/stack.h
@@ -76,7 +76,7 @@ enum {
 	// The minimum stack segment size to allocate.
 	// If the amount needed for the splitting frame + StackExtra
 	// is less than this number, the stack will have this size instead.
-	StackMin = 8192,
+	StackMin = 65536,
 	StackSystemRounded = StackSystem + (-StackSystem & (StackMin-1)),
 	FixedStack = StackMin + StackSystemRounded,
 
-- 
2.51.0