Subject: Re: kern/33185: kva shortage problems
To: None <kern-bug-people@netbsd.org, gnats-admin@netbsd.org,>
From: Christos Zoulas <christos@zoulas.com>
List: netbsd-bugs
Date: 04/04/2006 00:45:02
The following reply was made to PR kern/33185; it has been noted by GNATS.

From: christos@zoulas.com (Christos Zoulas)
To: gnats-bugs@netbsd.org, kern-bug-people@netbsd.org,
	gnats-admin@netbsd.org, netbsd-bugs@netbsd.org,
	yamt@mwd.biglobe.ne.jp
Cc: 
Subject: Re: kern/33185: kva shortage problems
Date: Mon, 3 Apr 2006 20:40:49 -0400

 On Apr 3, 11:30pm, thorpej@shagadelic.org (Jason Thorpe) wrote:
 -- Subject: Re: kern/33185: kva shortage problems
 
 | The following reply was made to PR kern/33185; it has been noted by GNATS.
 | 
 | From: Jason Thorpe <thorpej@shagadelic.org>
 | To: gnats-bugs@netbsd.org
 | Cc: kern-bug-people@netbsd.org, gnats-admin@netbsd.org,
 | 	netbsd-bugs@netbsd.org
 | Subject: Re: kern/33185: kva shortage problems
 | Date: Mon, 3 Apr 2006 16:26:53 -0700
 | 
 |  On Apr 3, 2006, at 3:45 PM, yamt@mwd.biglobe.ne.jp wrote:
 |  
 |  > 	1. lack of kva reclamation mechanism.
 |  > 	   http://mail-index.NetBSD.org/tech-kern/2005/12/17/0028.html
 |  > 	2. things like bufmem_hiwater and desiredvnodes doesn't consider
 |  > 	   the amount of kva.
 |  
 |  General lack of available KVA!
 |  
 |  Have we thought about doing 4+4 on i386?
 
 Linux tried it and it gets tricky... Specially dealing with DMA. Plus
 there is a ~10% performance penalty.
 
 christos