Put PAGESIZE into types.go, and use 1<<16 for input buffer size.

fuse/bufferpool.go

@@ -5,8 +5,6 @@ import (
 	"fmt"
 )
 
-const PAGESIZE int = 4096
-
 // This implements a pool of buffers that returns slices with capacity
 // (2^e * PAGESIZE) for e=0,1,...  which have possibly been used, and
 // may contain random contents.

fuse/fuse.go

@@ -14,8 +14,10 @@ import (
 
 // TODO make generic option setting.
 const (
-	maxRead = (1 << 16)
-	bufSize = maxRead + 1024
+	// bufSize should be a power of two to minimize lossage in
+	// BufferPool.
+	bufSize = (1 << 16)
+	maxRead = bufSize - PAGESIZE
 )
 
 type Empty interface{}

fuse/types.go

@@ -77,6 +77,9 @@ const (
 
 	S_IFDIR = syscall.S_IFDIR
 	S_IFREG = syscall.S_IFREG
+
+	// TODO - get this from a canonical place.
+	PAGESIZE = 4096
 )
 
 type Status int32