From owner-svn-src-head@freebsd.org Thu Apr 14 21:54:49 2016 Return-Path: Delivered-To: svn-src-head@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 01655AEC93C; Thu, 14 Apr 2016 21:54:49 +0000 (UTC) (envelope-from marck@rinet.ru) Received: from woozle.rinet.ru (woozle.rinet.ru [195.54.192.68]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 8C2801669; Thu, 14 Apr 2016 21:54:47 +0000 (UTC) (envelope-from marck@rinet.ru) Received: from localhost (localhost [127.0.0.1]) by woozle.rinet.ru (8.14.5/8.14.5) with ESMTP id u3ELscQW098838; Fri, 15 Apr 2016 00:54:38 +0300 (MSK) (envelope-from marck@rinet.ru) Date: Fri, 15 Apr 2016 00:54:38 +0300 (MSK) From: Dmitry Morozovsky To: Warner Losh cc: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r298002 - in head/sys: cam cam/ata cam/scsi conf dev/ahci In-Reply-To: <201604142147.u3ELlwYo052010@repo.freebsd.org> Message-ID: References: <201604142147.u3ELlwYo052010@repo.freebsd.org> User-Agent: Alpine 2.00 (BSF 1167 2008-08-23) X-NCC-RegID: ru.rinet X-OpenPGP-Key-ID: 6B691B03 MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.4.3 (woozle.rinet.ru [0.0.0.0]); Fri, 15 Apr 2016 00:54:38 +0300 (MSK) X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 14 Apr 2016 21:54:49 -0000 Warner, On Thu, 14 Apr 2016, Warner Losh wrote: > Author: imp > Date: Thu Apr 14 21:47:58 2016 > New Revision: 298002 > URL: https://svnweb.freebsd.org/changeset/base/298002 > > Log: > New CAM I/O scheduler for FreeBSD. The default I/O scheduler is the same [snip] First, thanks so much for this quite a non-trivial work! What are the ways to enable this instead of deafult, and what ar the benefits and drawbacks? > This code has run in production at Netflix for over a year now. Looking at this: could it be possibly targeted for MFCing? [snip all the diff] -- Sincerely, D.Marck [DM5020, MCK-RIPE, DM3-RIPN] [ FreeBSD committer: marck@FreeBSD.org ] ------------------------------------------------------------------------ *** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck@rinet.ru *** ------------------------------------------------------------------------