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Date: 16 Apr 2003 06:08:04 -0000
From: "Aleksey Ovcharenko" <postmaster@console.kharkov.ukrpack.net>
Reply-To: Aleksey Ovcharenko <alexovch@console.kharkov.ukrpack.net>
To: FreeBSD-gnats-submit@freebsd.org
Cc:
Subject: kernel panic while using dirhash at ~3000 directories like mailboxes
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>Number:         51015
>Category:       kern
>Synopsis:       kernel panic while using dirhash at ~3000 directories like mailboxes
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Apr 15 23:10:07 PDT 2003
>Closed-Date:    Fri Aug 15 20:57:26 PDT 2003
>Last-Modified:  Fri Aug 15 20:57:26 PDT 2003
>Originator:     Aleksey Ovcharenko
>Release:        FreeBSD 4.7-RELEASE-p7 i386
>Organization:
JVC Infocom
>Environment:
System: FreeBSD console.ic.kharkov.ua 4.7-RELEASE-p7 FreeBSD 4.7-RELEASE-p7 #2: Mon Mar 17 08:27:16 EET 2003 root@console.ic.kharkov.ua:/usr/obj/usr/src/sys/INFOCOM i386


	
>Description:
On high load on mail-server with ~3000 directories in mailboxes directory cause kernel panic: "ufsdirhash_lookup: bad offset in hash array" .
	
>How-To-Repeat:
Increase disk activity.
	
>Fix:

	


>Release-Note:
>Audit-Trail:

From: "Ted Mittelstaedt" <tedm@toybox.placo.com>
To: <freebsd-gnats-submit@FreeBSD.org>,
	<alexovch@console.kharkov.ukrpack.net>
Cc:  
Subject: Re: kern/51015: kernel panic while using dirhash at ~3000 directories like mailboxes
Date: Sat, 10 May 2003 00:10:45 -0700

 Kernel option "maxusers 0" which is the default in the GENERIC kernel
 is insufficient for many high-use servers.  Set maxusers to 256 in the
 kernel config file and recompile the kernel and set
 maxusers to 256 and test again.  You may also want to play with the
 UFS_DIRHASH option 
 
 Ted Mittelstaedt                                       tedm@toybox.placo.com
 
State-Changed-From-To: open->feedback 
State-Changed-By: kris 
State-Changed-When: Mon Jul 14 03:07:11 PDT 2003 
State-Changed-Why:  
Does the submitted advice solve the problem? If not, 
please obtain a debugging traceback as explained in 
http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug.html 

http://www.freebsd.org/cgi/query-pr.cgi?pr=51015 
State-Changed-From-To: feedback->closed 
State-Changed-By: kris 
State-Changed-When: Fri Aug 15 20:57:16 PDT 2003 
State-Changed-Why:  
Feedback timeout 

http://www.freebsd.org/cgi/query-pr.cgi?pr=51015 
>Unformatted:
