From owner-freebsd-hackers Tue Nov 10 23:22:33 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id XAA13522 for freebsd-hackers-outgoing; Tue, 10 Nov 1998 23:22:33 -0800 (PST) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from smtp01.primenet.com (smtp01.primenet.com [206.165.6.131]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id XAA13514 for ; Tue, 10 Nov 1998 23:22:29 -0800 (PST) (envelope-from tlambert@usr01.primenet.com) Received: (from daemon@localhost) by smtp01.primenet.com (8.8.8/8.8.8) id AAA19870; Wed, 11 Nov 1998 00:22:10 -0700 (MST) Received: from usr01.primenet.com(206.165.6.201) via SMTP by smtp01.primenet.com, id smtpd019812; Wed Nov 11 00:22:02 1998 Received: (from tlambert@localhost) by usr01.primenet.com (8.8.5/8.8.5) id AAA04416; Wed, 11 Nov 1998 00:21:56 -0700 (MST) From: Terry Lambert Message-Id: <199811110721.AAA04416@usr01.primenet.com> Subject: Re: Malloc in the kernel To: dg@root.com Date: Wed, 11 Nov 1998 07:21:56 +0000 (GMT) Cc: tlambert@primenet.com, grog@lemis.com, Reinier.Bezuidenhout@KryptoKom.DE, freebsd-hackers@FreeBSD.ORG In-Reply-To: <199811090915.BAA09637@root.com> from "David Greenman" at Nov 9, 98 01:15:16 am X-Mailer: ELM [version 2.4 PL25] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > >> > In general, the kernel is better at deciding what memory it needs > >> > when it needs it than a kernel code author. You either trust > >> > the locality of reference model upon which VM systems are based, > >> > or you don't. > >> > >> Assuming that fits his needs, what's the answer? > > > >vm_pager_allocate(OBJT_SWAP, 0, OFF_TO_IDX(size), VM_PROT_DEFAULT, 0); > > Bzzt! Wrong! > > ...but you could use kmem_alloc_pageable() (or call vm_map_find() directly) > to allocate demand-zero, pageable, kernel memory. Hmmm.... Better fix /sys/kern/sysv_shm.c then, since that's where I cribbed the code from... Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message