From owner-svn-src-all@FreeBSD.ORG Tue Oct 23 16:23:25 2012 Return-Path: Delivered-To: svn-src-all@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 22C23919; Tue, 23 Oct 2012 16:23:25 +0000 (UTC) (envelope-from alc@rice.edu) Received: from mh11.mail.rice.edu (mh11.mail.rice.edu [128.42.199.30]) by mx1.freebsd.org (Postfix) with ESMTP id E08768FC14; Tue, 23 Oct 2012 16:23:24 +0000 (UTC) Received: from mh11.mail.rice.edu (localhost.localdomain [127.0.0.1]) by mh11.mail.rice.edu (Postfix) with ESMTP id 12C8B4C02C6; Tue, 23 Oct 2012 11:23:24 -0500 (CDT) Received: from mh11.mail.rice.edu (localhost.localdomain [127.0.0.1]) by mh11.mail.rice.edu (Postfix) with ESMTP id 113E04C02AE; Tue, 23 Oct 2012 11:23:24 -0500 (CDT) X-Virus-Scanned: by amavis-2.7.0 at mh11.mail.rice.edu, auth channel Received: from mh11.mail.rice.edu ([127.0.0.1]) by mh11.mail.rice.edu (mh11.mail.rice.edu [127.0.0.1]) (amavis, port 10026) with ESMTP id LBNapbc_z3db; Tue, 23 Oct 2012 11:23:23 -0500 (CDT) Received: from adsl-216-63-78-18.dsl.hstntx.swbell.net (adsl-216-63-78-18.dsl.hstntx.swbell.net [216.63.78.18]) (using TLSv1 with cipher RC4-MD5 (128/128 bits)) (No client certificate requested) (Authenticated sender: alc) by mh11.mail.rice.edu (Postfix) with ESMTPSA id 8F7EB4C0261; Tue, 23 Oct 2012 11:23:23 -0500 (CDT) Message-ID: <5086C47B.9080202@rice.edu> Date: Tue, 23 Oct 2012 11:23:23 -0500 From: Alan Cox User-Agent: Mozilla/5.0 (X11; FreeBSD i386; rv:8.0) Gecko/20111113 Thunderbird/8.0 MIME-Version: 1.0 To: Gleb Smirnoff Subject: Re: svn commit: r241931 - in head/sys: conf kern References: <201210231419.q9NEJjYH082863@svn.freebsd.org> <20121023144211.GX70741@FreeBSD.org> <5086B24C.9000606@freebsd.org> <20121023160501.GB70741@FreeBSD.org> In-Reply-To: <20121023160501.GB70741@FreeBSD.org> Content-Type: text/plain; charset=KOI8-R; format=flowed Content-Transfer-Encoding: 7bit Cc: svn-src-head@FreeBSD.org, svn-src-all@FreeBSD.org, src-committers@FreeBSD.org, Andre Oppermann X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.14 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: Tue, 23 Oct 2012 16:23:25 -0000 On 10/23/2012 11:05, Gleb Smirnoff wrote: > On Tue, Oct 23, 2012 at 05:05:48PM +0200, Andre Oppermann wrote: > A> There shouldn't be any users. Zero copy send is broken and > A> responsible for random kernel crashes. Zero copy receive isn't > A> supported by any modern driver. Both are useless to dangerous. > A> > A> The main problem with ZERO_COPY_SOCKETS was that it sounded great > A> and who wouldn't want to have zero copy sockets? Unfortunately > A> it doesn't work that way. > > Okay, it appeared that there are users, even on current@ mailing > list during couple of hours of exposition. In my experience, that is because they are reporting a crash. > Can we keep the old option as compatibility? > >