From owner-freebsd-current Sat Mar 20 23:44:49 1999 Delivered-To: freebsd-current@freebsd.org Received: from apollo.backplane.com (apollo.backplane.com [209.157.86.2]) by hub.freebsd.org (Postfix) with ESMTP id 158E6151BC; Sat, 20 Mar 1999 23:44:48 -0800 (PST) (envelope-from dillon@apollo.backplane.com) Received: (from dillon@localhost) by apollo.backplane.com (8.9.3/8.9.1) id XAA09505; Sat, 20 Mar 1999 23:43:14 -0800 (PST) (envelope-from dillon) Date: Sat, 20 Mar 1999 23:43:14 -0800 (PST) From: Matthew Dillon Message-Id: <199903210743.XAA09505@apollo.backplane.com> To: Brian Feldman Cc: Alfred Perlstein , "John S. Dyson" , samit@usa.ltindia.com, commiters@FreeBSD.ORG, freebsd-current@FreeBSD.ORG Subject: Re: rfork() References: Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG :> > rfork(RFMEM) doesn't easily work from C. You need to :> > create an assembly stub. :> > :> > -- :> > John | Never try to teach a pig to sing, :> > dyson@iquest.net | it makes one look stupid :> > jdyson@nc.com | and it irritates the pig. :> > :> :> I've seen about 6 people ask about this because the manual lies about :> what is done. I asked a while back about it, and John was kind enough :> to dig up some code that used rfork to properly split the stack should :> I try to dig it up? :> :> In the meantime, can someone commit this or suggest something? : :For the suggest something, you realize that with Richard's VM_STACK code it :should be relatively trivial to make this automatic (suggestion: add :RFSTACK flag). : : Brian Feldman _ __ ___ ___ ___ : green@unixhelp.org _ __ ___ | _ ) __| \ : http://www.freebsd.org/ _ __ ___ ____ | _ \__ \ |) | : FreeBSD: The Power to Serve! _ __ ___ ____ _____ |___/___/___/ If the goal is to completely share the address space, which RFMEM does, you can't split anything, not even the stack. It sure would be useful if there were a standard clib call adequate for calling rfork() and calling a function in the child w/ a new stack. -Matt Matthew Dillon To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message