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Date: Sat, 21 Jul 2001 23:34:27 -0400 (EDT)
From: "Alexander N. Kabaev" <kabaev@mail.ru>
Reply-To: "Alexander N. Kabaev" <ak03@gte.com>
To: FreeBSD-gnats-submit@freebsd.org
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Subject: kern/29131: Current hungs in sysctl -a while booting + patch
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>Number:         29131
>Category:       kern
>Synopsis:       Current hungs in sysctl -a while booting + patch
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Jul 21 20:40:09 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     Alexander N. Kabaev
>Release:        FreeBSD 5.0-CURRENT i386
>Organization:
Verizon
>Environment:
System: FreeBSD kan.dnsalias.net 5.0-CURRENT FreeBSD 5.0-CURRENT #1: Sat Jul 21 23:05:49 EDT 2001 root@kan.dnsalias.net:/usr/src/sys/i386/compile/KAN i386

>Description:
	-CURRENT appears to hung while booting because sysctl -a never
	finishes. ^C can be used to interrupt the sysctl execution and
	to continue booting. 
	
	It appears, that a sysctl oid_number collision is happening. Namely,
	sysctl_register_oid allocates new numbers for OID_AUTO sysctl nodes
	starting from the number 100, while at the same time kernel registers
	predefined sysctls with ids as high as 255 (see SYSCTL_NODE for
	net.inet.raw). If I raise the starting number for dynamic sysctls
	to be 255, the problem disappears.

>How-To-Repeat:
	N/A
>Fix:

Index: kern_sysctl.c
===================================================================
RCS file: /home/ncvs/src/sys/kern/kern_sysctl.c,v
retrieving revision 1.110
diff -u -u -r1.110 kern_sysctl.c
--- kern_sysctl.c	2001/06/22 19:54:38	1.110
+++ kern_sysctl.c	2001/07/22 03:04:45
@@ -113,7 +113,7 @@
 	 * 100 to leave space for pre-assigned oid numbers.
 	 */
 	if (oidp->oid_number == OID_AUTO) {
-		static int newoid = 100;
+		static int newoid = 0x100;
 
 		oidp->oid_number = newoid++;
 		if (newoid == 0x7fffffff)
>Release-Note:
>Audit-Trail:
>Unformatted:

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