From owner-freebsd-hackers Tue Aug 27 16:06:39 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id QAA07788 for hackers-outgoing; Tue, 27 Aug 1996 16:06:39 -0700 (PDT) Received: from root.com (implode.root.com [198.145.90.17]) by freefall.freebsd.org (8.7.5/8.7.3) with ESMTP id QAA07783 for ; Tue, 27 Aug 1996 16:06:36 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by root.com (8.7.5/8.6.5) with SMTP id QAA18093; Tue, 27 Aug 1996 16:06:30 -0700 (PDT) Message-Id: <199608272306.QAA18093@root.com> X-Authentication-Warning: implode.root.com: Host localhost [127.0.0.1] didn't use HELO protocol To: Tom Samplonius cc: hackers@freebsd.org Subject: Re: options "NO_SWAPPING" ? In-reply-to: Your message of "Tue, 27 Aug 1996 11:35:51 PDT." From: David Greenman Reply-To: dg@root.com Date: Tue, 27 Aug 1996 16:06:30 -0700 Sender: owner-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk > > Exactly what impact does "NO_SWAPPING" have on a 2.1.5+ system? > > I started using this back in 2.1-stable days to avoid some bugs causing >panics (pmap related I believe). Is it still recommended? It prevents the system from paging out the "upages", which includes the kernel stack. I don't think I've ever been able to prove that paging of the upages was at all related to any of the kernel panics that we used to see, so I'd say that you should probably not use the option unless, for some reason, you really don't want the system to page out the last little bits of a process. -DG David Greenman Core-team/Principal Architect, The FreeBSD Project