The following reply was made to PR bin/29774; it has been noted by GNATS.

From: Karsten Kruse <tecneeq@tecneeq.de>
To: gnats-bugs@netbsd.org
Cc: gnats-admin@netbsd.org, netbsd-bugs@netbsd.org
Subject: Re: bin/29774: sysctl can't raise kern.mbuf.nmbclusters
Date: Thu, 24 Mar 2005 12:45:40 +0100

 Manuel Bouyer wrote:
 
 >  >   I try to raise kern.mbuf.nmbclusters from 1024 to 2048 wich,
 >  >   according to the manpage, should be possible. It is not.
 
 >  sysctl(3) says:
 >               MBUF_NMBCLUSTERS
 >  		The limit on the number of mbuf clusters.  The variable
 >  		can only be increased, and only increased on machines
 >  		with direct-mapped pool pages
 
 >  So it's not supposed to work on all machines, and i386 doesn't have
 >  direct-mapped pool pages.
 
 I see. Thanks.
 
 > It's a bug in sysctl(8).
 > How to document it in sysctl(8) ? Change "raise only" to "machine dependant" ?
 
 Maybe "raise only, machine dependant"?
 
 The problem is solved for me.
 
 Karsten Kruse
 
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