Module Name: src
Committed By: pooka
Date: Wed Apr 3 20:23:02 UTC 2013
Modified Files:
src/sys/rump/librump/rumpvfs: rump_vfs.c
Log Message:
Don't create a huge number of unnecessary device nodes automatically.
Creating them takes 70-or-so ms on a RPi, and can almost double the
bootstrap time of a rump kernel on that hardware.
To generate a diff of this commit:
cvs rdiff -u -r1.71 -r1.72 src/sys/rump/librump/rumpvfs/rump_vfs.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/rump/librump/rumpvfs/rump_vfs.c
diff -u src/sys/rump/librump/rumpvfs/rump_vfs.c:1.71 src/sys/rump/librump/rumpvfs/rump_vfs.c:1.72
--- src/sys/rump/librump/rumpvfs/rump_vfs.c:1.71 Mon Jan 14 16:45:47 2013
+++ src/sys/rump/librump/rumpvfs/rump_vfs.c Wed Apr 3 20:23:01 2013
@@ -1,4 +1,4 @@
-/* $NetBSD: rump_vfs.c,v 1.71 2013/01/14 16:45:47 pooka Exp $ */
+/* $NetBSD: rump_vfs.c,v 1.72 2013/04/03 20:23:01 pooka Exp $ */
/*
* Copyright (c) 2008 Antti Kantee. All Rights Reserved.
@@ -29,7 +29,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: rump_vfs.c,v 1.71 2013/01/14 16:45:47 pooka Exp $");
+__KERNEL_RCSID(0, "$NetBSD: rump_vfs.c,v 1.72 2013/04/03 20:23:01 pooka Exp $");
#include <sys/param.h>
#include <sys/buf.h>
@@ -91,8 +91,6 @@ drainbufs(int npages)
RUMP_COMPONENT(RUMP__FACTION_VFS)
{
- extern struct devsw_conv devsw_conv0[];
- extern int max_devsw_convs;
extern struct vfsops rumpfs_vfsops;
char buf[64];
int error;
@@ -180,7 +178,22 @@ RUMP_COMPONENT(RUMP__FACTION_VFS)
module_init_class(MODULE_CLASS_VFS);
+ /*
+ * Don't build device names for a large set of devices by
+ * default. While the pseudo-devfs is a fun experiment,
+ * creating many many device nodes may increase rump kernel
+ * bootstrap time by ~40%. Device nodes should be created
+ * per-demand in the component constructors.
+ */
+#if 0
+ {
+ extern struct devsw_conv devsw_conv0[];
+ extern int max_devsw_convs;
rump_vfs_builddevs(devsw_conv0, max_devsw_convs);
+ }
+#else
+ rump_vfs_builddevs(NULL, 0);
+#endif
rump_component_init(RUMP_COMPONENT_VFS);
}
