From owner-freebsd-hackers Fri Jul 24 15:39:59 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id PAA13880 for freebsd-hackers-outgoing; Fri, 24 Jul 1998 15:39:59 -0700 (PDT) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from echonyc.com (echonyc.com [198.67.15.2]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id PAA13872 for ; Fri, 24 Jul 1998 15:39:49 -0700 (PDT) (envelope-from benedict@echonyc.com) Received: from localhost (benedict@localhost) by echonyc.com (8.8.7/8.8.7) with SMTP id SAA09275; Fri, 24 Jul 1998 18:39:13 -0400 (EDT) Date: Fri, 24 Jul 1998 18:39:13 -0400 (EDT) From: Snob Art Genre Reply-To: ben@rosengart.com To: Stefan Eggers cc: Edwin de Graaf , freebsd-hackers@FreeBSD.ORG Subject: Re: How do I measure swap activity? In-Reply-To: <199807241741.TAA21786@semyam.dinoco.de> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Fri, 24 Jul 1998, Stefan Eggers wrote: > > there are two kinds of pagers, the VN pager and the SWAP pager. Do both of > > these cause a disk access? What is the difference between the two? > > As far as I understand the internals now the VN pager is the one used > for vnodes - used with mmap'ed files. The other is for swap space use > - the pages the system throws out of main memory. Do we use the VN pager for executing program files, like 4.4BSD? Also, the 4.4 book describes a device pager as well as swap and vnode, for paging memory-mapped hardware devices. Ben "You have your mind on computers, it seems." To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message