Fixed maxReadahead.

connection.go

@@ -32,6 +32,25 @@ import (
 	"github.com/jacobsa/fuse/internal/fuseshim"
 )
 
+// Ask the Linux kernel for larger read requests.
+//
+// As of 2015-03-26, the behavior in the kernel is:
+//
+//  *  (http://goo.gl/bQ1f1i, http://goo.gl/HwBrR6) Set the local variable
+//     ra_pages to be init_response->max_readahead divided by the page size.
+//
+//  *  (http://goo.gl/gcIsSh, http://goo.gl/LKV2vA) Set
+//     backing_dev_info::ra_pages to the min of that value and what was sent
+//     in the request's max_readahead field.
+//
+//  *  (http://goo.gl/u2SqzH) Use backing_dev_info::ra_pages when deciding
+//     how much to read ahead.
+//
+//  *  (http://goo.gl/JnhbdL) Don't read ahead at all if that field is zero.
+//
+// Reading a page at a time is a drag. Ask for a larger size.
+const maxReadahead = 1 << 20
+
 // A connection to the fuse kernel process.
 type Connection struct {
 	debugLogger *log.Logger
@@ -72,7 +91,7 @@ func newConnection(
 		Dev: dev,
 	}
 
-	err = fuseshim.InitMount(wrapped, TODO, TODO)
+	err = fuseshim.InitMount(wrapped, maxReadahead, TODO)
 	if err != nil {
 		err = fmt.Errorf("fuseshim.InitMount: %v", err)
 		return

mount_config.go

@@ -129,26 +129,6 @@ func (c *MountConfig) bazilfuseOptions() (opts []fuseshim.MountOption) {
 		opts = append(opts, fuseshim.SetOption("noappledouble", ""))
 	}
 
-	// Ask the Linux kernel for larger read requests.
-	//
-	// As of 2015-03-26, the behavior in the kernel is:
-	//
-	//  *  (http://goo.gl/bQ1f1i, http://goo.gl/HwBrR6) Set the local variable
-	//     ra_pages to be init_response->max_readahead divided by the page size.
-	//
-	//  *  (http://goo.gl/gcIsSh, http://goo.gl/LKV2vA) Set
-	//     backing_dev_info::ra_pages to the min of that value and what was sent
-	//     in the request's max_readahead field.
-	//
-	//  *  (http://goo.gl/u2SqzH) Use backing_dev_info::ra_pages when deciding
-	//     how much to read ahead.
-	//
-	//  *  (http://goo.gl/JnhbdL) Don't read ahead at all if that field is zero.
-	//
-	// Reading a page at a time is a drag. Ask for a larger size.
-	const maxReadahead = 1 << 20
-	opts = append(opts, fuseshim.MaxReadahead(maxReadahead))
-
 	// Last but not least: other user-supplied options.
 	for k, v := range c.Options {
 		opts = append(opts, fuseshim.SetOption(k, v))