From owner-svn-src-all@FreeBSD.ORG Thu Oct 24 11:01:02 2013 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id DAF2896; Thu, 24 Oct 2013 11:01:02 +0000 (UTC) (envelope-from prvs=1009ce2dcc=killing@multiplay.co.uk) Received: from mail1.multiplay.co.uk (mail1.multiplay.co.uk [85.236.96.23]) (using TLSv1 with cipher RC4-MD5 (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 2E5832387; Thu, 24 Oct 2013 11:01:01 +0000 (UTC) Received: from r2d2 ([82.69.141.170]) by mail1.multiplay.co.uk (mail1.multiplay.co.uk [85.236.96.23]) (MDaemon PRO v10.0.4) with ESMTP id md50006493677.msg; Thu, 24 Oct 2013 12:00:53 +0100 X-Spam-Processed: mail1.multiplay.co.uk, Thu, 24 Oct 2013 12:00:53 +0100 (not processed: message from valid local sender) X-MDDKIM-Result: neutral (mail1.multiplay.co.uk) X-MDRemoteIP: 82.69.141.170 X-Return-Path: prvs=1009ce2dcc=killing@multiplay.co.uk X-Envelope-From: killing@multiplay.co.uk Message-ID: <062D17FCE7E44812812E249D864EF0DA@multiplay.co.uk> From: "Steven Hartland" To: "Slawa Olhovchenkov" References: <201310230954.r9N9sxAZ011750@svn.freebsd.org> <20131024102118.GA59011@zxy.spb.ru> Subject: Re: svn commit: r256956 - in head/sys: cam/ata cam/scsi cddl/contrib/opensolaris/uts/common/fs/zfs cddl/contrib/opensolaris/uts/common/fs/zfs/sys geom sys Date: Thu, 24 Oct 2013 12:00:54 +0100 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org 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: Thu, 24 Oct 2013 11:01:02 -0000 Not familiar with that option, but having a quick look in src it doesn't seem to be FS specific, seems to be handled by vfs. Can anyone confirm or deny this? ----- Original Message ----- From: "Slawa Olhovchenkov" > On Wed, Oct 23, 2013 at 09:54:59AM +0000, Steven Hartland wrote: > >> Author: smh >> Date: Wed Oct 23 09:54:58 2013 >> New Revision: 256956 >> URL: http://svnweb.freebsd.org/changeset/base/256956 >> >> Log: >> Improve ZFS N-way mirror read performance by using load and locality >> information. > > What about support F_READAHEAD in ZFS (with prefetch disabled by > CPU-intensive)? > ================================================ This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it. In the event of misdirection, illegible or incomplete transmission please telephone +44 845 868 1337 or return the E.mail to postmaster@multiplay.co.uk.