From owner-cvs-all Thu Mar 30 2:47: 8 2000 Delivered-To: cvs-all@freebsd.org Received: from overcee.netplex.com.au (peter1.yahoo.com [208.48.107.4]) by hub.freebsd.org (Postfix) with ESMTP id E53A537B690; Thu, 30 Mar 2000 02:47:00 -0800 (PST) (envelope-from peter@netplex.com.au) Received: from netplex.com.au (localhost [127.0.0.1]) by overcee.netplex.com.au (Postfix) with ESMTP id 44DEE1CD7; Thu, 30 Mar 2000 02:47:00 -0800 (PST) (envelope-from peter@netplex.com.au) X-Mailer: exmh version 2.1.1 10/15/1999 To: Matthew Dillon Cc: "Daniel O'Connor" , cvs-all@FreeBSD.ORG, cvs-committers@FreeBSD.ORG Subject: Re: cvs commit: src/sys/alpha/include vmparam.h src/sys/conf opt In-Reply-To: Message from Matthew Dillon of "Wed, 29 Mar 2000 23:53:58 PST." <200003300753.XAA68882@apollo.backplane.com> Date: Thu, 30 Mar 2000 02:47:00 -0800 From: Peter Wemm Message-Id: <20000330104700.44DEE1CD7@overcee.netplex.com.au> Sender: owner-cvs-all@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Matthew Dillon wrote: > : > :"Daniel O'Connor" wrote: > :> > :> On 30-Mar-00 Peter Wemm wrote: > :> > that comment is bogus.. The only practical limit is how much physica l > :> > ram you want to lock up as this stuff isn't paged out or swap backed. > :> > :> Is it [easily] possible to make its pageable? > : > :I don't know. Probably, if one wanted to cut/paste code from the likes > :of the swap-backed code in the vn device. > > I couldn't find the beginning of this thread, but if you are talking > about making the PV entries pageable, it isn't possible. No, the shared memory segments themselves, not the PV entries. Presently the pages are wired directly into the processes that attach to them and they are not pageable. (which is a distinct advantage over using mmap for temporary storage if you don't want pagedaemon messing with it - even for MAP_ANON) Cheers, -Peter To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message