From d0eaa58b5a19f15546af4d61a1dc9987af168b5a Mon Sep 17 00:00:00 2001
From: Russ Cox <rsc@golang.org>
Date: Mon, 31 Oct 2011 17:50:25 -0400
Subject: [PATCH] runtime/pprof: document OS X being broken

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5307078
---
 src/pkg/runtime/pprof/pprof.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/pkg/runtime/pprof/pprof.go b/src/pkg/runtime/pprof/pprof.go
index fdeceb4e8dc..70228964545 100644
--- a/src/pkg/runtime/pprof/pprof.go
+++ b/src/pkg/runtime/pprof/pprof.go
@@ -17,6 +17,9 @@ import (
 	"sync"
 )
 
+// BUG(rsc): CPU profiling is broken on OS X, due to an Apple kernel bug.
+// For details, see http://code.google.com/p/go/source/detail?r=35b716c94225.
+
 // WriteHeapProfile writes a pprof-formatted heap profile to w.
 // If a write to w returns an error, WriteHeapProfile returns that error.
 // Otherwise, WriteHeapProfile returns nil.