From 01a7d39df1d6ba5e3ba8a5b8e928b906556c6772 Mon Sep 17 00:00:00 2001
From: Keith Randall <khr@golang.org>
Date: Sat, 19 Jul 2014 10:29:57 -0700
Subject: [PATCH] runtime: fix stacks_sys accounting

subtract freed count before span gets merged during free.

LGTM=dvyukov
R=dmitry, dvyukov
CC=golang-codereviews
https://golang.org/cl/112450045
---
 src/pkg/runtime/mheap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/pkg/runtime/mheap.c b/src/pkg/runtime/mheap.c
index c03287fd4b..202a903ff8 100644
--- a/src/pkg/runtime/mheap.c
+++ b/src/pkg/runtime/mheap.c
@@ -507,8 +507,8 @@ runtime·MHeap_FreeStack(MHeap *h, MSpan *s)
 		runtime·throw("mheap_freestack not on M stack");
 	s->needzero = 1;
 	runtime·lock(h);
-	MHeap_FreeSpanLocked(h, s);
 	mstats.stacks_inuse -= s->npages<<PageShift;
+	MHeap_FreeSpanLocked(h, s);
 	runtime·unlock(h);
 }
 
-- 
2.48.1