runtime: revert MaxGcproc from 16 to 4

The change accidentally come in with this revision:
https://code.google.com/p/go/source/detail?spec=svn345cbca96c5550f2e89bc727703301933802923c&r=14c38c23c819a17021b1808cf4a34ef3a1a17db5

R=golang-dev
CC=golang-dev
https://golang.org/cl/6195073

diff --git a/src/pkg/runtime/malloc.h b/src/pkg/runtime/malloc.h
index 081ebd1394edef186bc8da6ccb145ca0cb1cedd1..c9ac7c00c9c458af0a2932b312d08709e4a2f5e5 100644 (file)
--- a/src/pkg/runtime/malloc.h
+++ b/src/pkg/runtime/malloc.h
@@ -125,7 +125,7 @@ enum
        // 2, 3, and 4 are all plausible maximums depending
        // on the hardware details of the machine.  The garbage
        // collector scales well to 4 cpus.
-       MaxGcproc = 16,
+       MaxGcproc = 4,
 };
 
 // A generic linked list of blocks.  (Typically the block is bigger than sizeof(MLink).)