From owner-svn-src-all@freebsd.org Wed Dec 13 18:08:02 2017 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id B7A79E81A53; Wed, 13 Dec 2017 18:08:02 +0000 (UTC) (envelope-from danfe@freebsd.org) Received: from freefall.freebsd.org (freefall.freebsd.org [96.47.72.132]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "freefall.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 966567B7ED; Wed, 13 Dec 2017 18:08:02 +0000 (UTC) (envelope-from danfe@freebsd.org) Received: by freefall.freebsd.org (Postfix, from userid 1033) id DD2A88638; Wed, 13 Dec 2017 18:08:01 +0000 (UTC) Date: Wed, 13 Dec 2017 18:08:01 +0000 From: Alexey Dokuchaev To: Eugene Grosbein Cc: rgrimes@freebsd.org, Warner Losh , svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r326809 - head/sys/dev/cardbus Message-ID: <20171213180801.GA28514@FreeBSD.org> References: <201712131338.vBDDcHCM091865@pdx.rh.CN85.dnsmgr.net> <5A3167E1.2000201@grosbein.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5A3167E1.2000201@grosbein.net> User-Agent: Mutt/1.9.1 (2017-09-22) X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 13 Dec 2017 18:08:02 -0000 On Thu, Dec 14, 2017 at 12:48:17AM +0700, Eugene Grosbein wrote: > ... > I don't understand why you want to backout that. It changed nothing for > amd64. An i386 is still vulnerable to double faults just because of a > network packet processing path can overflow kstack for the GENERIC kernel. The reason (or shall I say concern) was raised by kib@, as quoted: > Plain workstation use, like X11+browser+editor+some other programs easily > allocates 1000+ threads. It was still possible to use 32bit x86 for that, > of course in max memory config without PAE, and without ZFS. Add some > load that involves network, for instance torrent client, to establish the > pressure on KVA. > I am almost sure that users would get troubles now. I'm a plain workstation user with X11+browser+torrent+quake2+you-name-it apps, PAE-less, ZFS-less, and I don't want to get troubles due to r326758. ./danfe