From 47f728c0bc17917916748b0d7360860e771bcccf Mon Sep 17 00:00:00 2001
From: obrien <obrien@FreeBSD.org>
Date: Mon, 2 Aug 2004 21:52:43 +0000
Subject: [PATCH] Put a cap on the auto-tuning of kern.maxvnodes.

Cap value chosen by:	scottl
---
 sys/kern/vfs_subr.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c
index 4d67de05e341..52f564f58371 100644
--- a/sys/kern/vfs_subr.c
+++ b/sys/kern/vfs_subr.c
@@ -257,6 +257,8 @@ int (*softdep_process_worklist_hook)(struct mount *);
 /*
  * Initialize the vnode management data structures.
  */
+#define	MAX_SAFE_MAXVNODES	100000
+
 static void
 vntblinit(void *dummy __unused)
 {
@@ -270,6 +272,12 @@ vntblinit(void *dummy __unused)
 	 */
 	desiredvnodes = min(maxproc + cnt.v_page_count / 4, 2 * vm_kmem_size /
 	    (5 * (sizeof(struct vm_object) + sizeof(struct vnode))));
+	if (desiredvnodes > MAX_SAFE_MAXVNODES) {
+		if (bootverbose)
+			printf("Reducing kern.maxvnodes %d -> %d\n",
+			    desiredvnodes, MAX_SAFE_MAXVNODES);
+		desiredvnodes = MAX_SAFE_MAXVNODES;
+	}
 	minvnodes = desiredvnodes / 4;
 	mtx_init(&mountlist_mtx, "mountlist", NULL, MTX_DEF);
 	mtx_init(&mntid_mtx, "mntid", NULL, MTX_DEF);