From owner-freebsd-arch@FreeBSD.ORG Wed Aug 27 01:20:24 2008 Return-Path: Delivered-To: freebsd-arch@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 670761065678 for ; Wed, 27 Aug 2008 01:20:24 +0000 (UTC) (envelope-from andrew@areilly.bpa.nu) Received: from nskntmtas05p.mx.bigpond.com (nskntmtas05p.mx.bigpond.com [61.9.168.149]) by mx1.freebsd.org (Postfix) with ESMTP id CC5918FC1B for ; Wed, 27 Aug 2008 01:20:23 +0000 (UTC) (envelope-from andrew@areilly.bpa.nu) Received: from nskntotgx02p.mx.bigpond.com ([124.188.162.219]) by nskntmtas05p.mx.bigpond.com with ESMTP id <20080827012017.ZEGQ19244.nskntmtas05p.mx.bigpond.com@nskntotgx02p.mx.bigpond.com> for ; Wed, 27 Aug 2008 01:20:17 +0000 Received: from areilly.bpa.nu ([124.188.162.219]) by nskntotgx02p.mx.bigpond.com with ESMTP id <20080827012017.VAMZ15766.nskntotgx02p.mx.bigpond.com@areilly.bpa.nu> for ; Wed, 27 Aug 2008 01:20:17 +0000 Received: (qmail 98381 invoked by uid 501); 27 Aug 2008 01:19:49 -0000 Date: Wed, 27 Aug 2008 11:19:49 +1000 From: Andrew Reilly To: Alfred Perlstein Message-ID: <20080827011949.GA98242@duncan.reilly.home> References: <3c1674c90808231713x47e42de5oa9fc2f2f244d2e74@mail.gmail.com> <20080826074943.GB85357@duncan.reilly.home> <20080826162807.GF16977@elvis.mu.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080826162807.GF16977@elvis.mu.org> User-Agent: Mutt/1.4.2.3i X-RPD-ScanID: Class unknown; VirusThreatLevel unknown, RefID str=0001.0A150204.48B4ABD1.005B,ss=1,fgs=0 Cc: freebsd-arch@freebsd.org, Ivan Voras , Matthew Macy Subject: Re: FreeBSD and DEP aka "NX bit"? X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 27 Aug 2008 01:20:24 -0000 On Tue, Aug 26, 2008 at 09:28:07AM -0700, Alfred Perlstein wrote: > * Andrew Reilly [080826 00:51] wrote: > > I've been using 7-STABLE on amd64 for a long time, and haven't > > noticed any problems with Java or SBCL lisp or PLT-scheme, all > > of which use JIT code generation (but probably neither use > > jemalloc?) > > mprotect(2)? Fair enough. Good to know that it's actually tweaking the NX permissions, I guess. The man page seems a little vague about when it might succeed, and what effect it might have... Cheers, -- Andrew