From owner-freebsd-arch@FreeBSD.ORG Sat Feb 4 15:29:47 2012 Return-Path: Delivered-To: arch@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 3BD93106564A for ; Sat, 4 Feb 2012 15:29:47 +0000 (UTC) (envelope-from des@des.no) Received: from smtp.des.no (smtp.des.no [194.63.250.102]) by mx1.freebsd.org (Postfix) with ESMTP id EDC658FC0C for ; Sat, 4 Feb 2012 15:29:46 +0000 (UTC) Received: from ds4.des.no (des.no [84.49.246.2]) by smtp.des.no (Postfix) with ESMTP id 2E51E6BF1; Sat, 4 Feb 2012 15:29:46 +0000 (UTC) Received: by ds4.des.no (Postfix, from userid 1001) id E84AA8991; Sat, 4 Feb 2012 16:29:45 +0100 (CET) From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= To: Konstantin Belousov References: <20120203193719.GB3283@deviant.kiev.zoral.com.ua> Date: Sat, 04 Feb 2012 16:29:45 +0100 In-Reply-To: <20120203193719.GB3283@deviant.kiev.zoral.com.ua> (Konstantin Belousov's message of "Fri, 3 Feb 2012 21:37:19 +0200") Message-ID: <8662fmk45y.fsf@ds4.des.no> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.3 (berkeley-unix) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Cc: arch@freebsd.org Subject: Re: Prefaulting for i/o buffers 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: Sat, 04 Feb 2012 15:29:47 -0000 Konstantin Belousov writes: > I previously published the patches to convert i/o path to use VMIO, > based on the Jeff Roberson proposal, see > http://wiki.freebsd.org/VM6. As a side effect, the VM6 fixed the > deadlock. Since that work is very intrusive and did not got any > follow-up, it get stalled. If it works, and you commit it now, we have at least a year to shake it down before the 10.0 release cycle... DES --=20 Dag-Erling Sm=C3=B8rgrav - des@des.no