From owner-freebsd-current Sun Mar 24 11: 8:16 2002 Delivered-To: freebsd-current@freebsd.org Received: from critter.freebsd.dk (critter.freebsd.dk [212.242.86.163]) by hub.freebsd.org (Postfix) with ESMTP id 7B4DD37B41F; Sun, 24 Mar 2002 11:08:08 -0800 (PST) Received: from critter.freebsd.dk (localhost [127.0.0.1]) by critter.freebsd.dk (8.12.2/8.12.2) with ESMTP id g2OJ7qp1064166; Sun, 24 Mar 2002 20:07:53 +0100 (CET) (envelope-from phk@critter.freebsd.dk) To: Robert Watson Cc: current@FreeBSD.ORG Subject: Re: turning off malloc's AJ by default In-Reply-To: Your message of "Sun, 24 Mar 2002 13:59:56 EST." Date: Sun, 24 Mar 2002 20:07:52 +0100 Message-ID: <64165.1016996872@critter.freebsd.dk> From: Poul-Henning Kamp Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG In message , Robe rt Watson writes: >Something that phk and I have discussed out-of-band is the idea of keying >phkmalloc behavior to kernel selection. I.e., exposing a policy sysctl >from the kernel, keyed to the kernel identity/option, causing phkmalloc to >behave different based on the kernel selection. This would allow DEBUG to >turn on maximal debugging, but GENERIC to have phkmalloc behave "like a >release". I said this as possible with a sysctl, I still think it is moderately disgusting though. You can do the same thing more visible by having /etc/rc* fiddle /etc/malloc.conf based on uname(1). >We will actually be offering at least three seperate kernels on the DP cd: > >- GENERIC, which resembles a normal release GENERIC >- DEBUG, which has uber-debugging features >- NEWCARD, which offers the NEWCARD feature set I would expect the three planned DP's to have these properties: One DEBUG kernel with: INVARIANTS WITNESS DDB One GENERIC kernel with: INVARIANTS DDB Userland: DP1 + DP2: malloc AJ DP3: malloc A Now, I also have to say that I'm not going to do any of this, so this will be my last email on the topic: Do whatever you think is the right thing to do. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message