[src/trunk]: src/sys adjust maximum number of vnodes in vnode cache according

[jdolecek <jdolecek%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/52a54572697f
branches:  trunk
changeset: 494416:52a54572697f
user:      jdolecek <jdolecek%NetBSD.org@localhost>
date:      Thu Jul 06 09:51:54 2000 +0000

description:
adjust maximum number of vnodes in vnode cache according
to machine memory size upon boot if the number has not been specified
explicitly in kernel config - at this moment, 0.5% of system
memory is used for vnodes (but minimum NVNODE vnodes)

diffstat:

 sys/kern/init_main.c |  16 +++++++++++++++-
 sys/sys/param.h      |   3 ++-
 2 files changed, 17 insertions(+), 2 deletions(-)

diffs (54 lines):

diff -r 32cfc901bc49 -r 52a54572697f sys/kern/init_main.c
--- a/sys/kern/init_main.c      Thu Jul 06 08:20:51 2000 +0000
+++ b/sys/kern/init_main.c      Thu Jul 06 09:51:54 2000 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: init_main.c,v 1.174 2000/06/27 17:41:12 mrg Exp $      */
+/*     $NetBSD: init_main.c,v 1.175 2000/07/06 09:51:55 jdolecek Exp $ */
 
 /*
  * Copyright (c) 1995 Christopher G. Demetriou.  All rights reserved.
@@ -188,6 +188,9 @@
 #if defined(NFSSERVER) || defined(NFS)
        extern void nfs_init __P((void));
 #endif
+#ifdef NVNODE_IMPLICIT
+       int usevnodes;
+#endif
 
        /*
         * Initialize the current process pointer (curproc) before
@@ -497,6 +500,17 @@
        start_init_exec = 1;
        wakeup((void *)&start_init_exec);
 
+#ifdef NVNODE_IMPLICIT
+       /*
+        * If maximum number of vnodes in namei vnode cache is not explicitly
+        * defined in kernel config, adjust the number such as we use roughly
+        * 0.5% of memory for vnode cache (but not less than NVNODE vnodes).
+        */
+       usevnodes = (ptoa(physmem) / 200) / sizeof(struct vnode);
+       if (usevnodes > desiredvnodes) 
+               desiredvnodes = usevnodes;
+#endif
+
        /* The scheduler is an infinite loop. */
        uvm_scheduler();
        /* NOTREACHED */
diff -r 32cfc901bc49 -r 52a54572697f sys/sys/param.h
--- a/sys/sys/param.h   Thu Jul 06 08:20:51 2000 +0000
+++ b/sys/sys/param.h   Thu Jul 06 09:51:54 2000 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: param.h,v 1.101 2000/06/30 07:44:06 veego Exp $        */
+/*     $NetBSD: param.h,v 1.102 2000/07/06 09:51:54 jdolecek Exp $     */
 
 /*-
  * Copyright (c) 1982, 1986, 1989, 1993
@@ -131,6 +131,7 @@
 #endif
 #ifndef NVNODE
 #define        NVNODE (NPROC + NTEXT + 100)
+#define        NVNODE_IMPLICIT
 #endif
 #endif /* _KERNEL */