From owner-freebsd-scsi@freebsd.org Fri Dec 18 04:50:44 2015 Return-Path: Delivered-To: freebsd-scsi@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 B7DF4A4B0FB for ; Fri, 18 Dec 2015 04:50:44 +0000 (UTC) (envelope-from wlosh@bsdimp.com) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id 9AD2F1A23 for ; Fri, 18 Dec 2015 04:50:44 +0000 (UTC) (envelope-from wlosh@bsdimp.com) Received: by mailman.ysv.freebsd.org (Postfix) id 9A24DA4B0FA; Fri, 18 Dec 2015 04:50:44 +0000 (UTC) Delivered-To: scsi@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 99C5CA4B0F9 for ; Fri, 18 Dec 2015 04:50:44 +0000 (UTC) (envelope-from wlosh@bsdimp.com) Received: from mail-qg0-x229.google.com (mail-qg0-x229.google.com [IPv6:2607:f8b0:400d:c04::229]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 6179F1A22 for ; Fri, 18 Dec 2015 04:50:44 +0000 (UTC) (envelope-from wlosh@bsdimp.com) Received: by mail-qg0-x229.google.com with SMTP id v36so24998493qgd.2 for ; Thu, 17 Dec 2015 20:50:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bsdimp-com.20150623.gappssmtp.com; s=20150623; h=mime-version:sender:date:message-id:subject:from:to:content-type; bh=TLSq9gfWleevEW7AxC3cymlJDeS97U5WGnUd2Uuz5xE=; b=w0HlXNGiPPKPxRrzlo0XaM2w/S439IyQND907ByC4Jf+6syGEe2Lx3W76FZdwzi5X3 xLY0qpadWF8uKEPl9DMonQ3F9Z/WvtvYwM7qQ6IebpAZ97EwugQmv6XufGNdxmKqdG8Q SPl54Za9cFUpAMGFf/ZCAGp7FBb7SjQGGFmL3McbJNqpnD4Kv9uMRQ7v3Wfsc+jW4sh2 18Wq3ciVesL1SyYKogtJ8m9RziNWgi7f4WnsanmvpXmhq6gjagWrawqsT0trSrr6OdBX wr4z1BdIz04us+A0GJWaRc5njqedCeTwDojJ5dfnIshwM0k1jZOZOi8zBtD0pNrkxQVG aFug== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:sender:date:message-id:subject:from :to:content-type; bh=TLSq9gfWleevEW7AxC3cymlJDeS97U5WGnUd2Uuz5xE=; b=kQUQPvxEPGNeowhXN8Ec6AQLwuNQhs2ltB1qYXcQqxHzJb/QyF4DRurFW+Uy6yOA+v Y2fgzQlWrEaehMx1xQE3u+ec4onMjKquEnxrLMit3gRkInrIzKmaLCeADDrCybE4Ju6l P7QUBkR3VwsBFEfhzFxZYJ+vUvyDazcP4j/TvESykQLhdUi7xDWk9dfhLKW9XFwKhXn1 4WQWuuvTjo2TDcOMs6kFLWBjHWx8R//C5Q/xTan6wp3CiRu5DHa3/UnCapqCqqqnglXE pdmU5Gq8+qbAjtTmFS3c48kH0ZreK9kS4HTau01hxolu5Lo5F8Ucp/+oP2RBJi/Gy4Zw gGMQ== X-Gm-Message-State: ALoCoQmc+EV9OB530w6xmCCI0oYwZaQCeH8PaaybkGU3K1/yrUCcbOxgZ5X1hSXax3M4mEpY/SJCtmKh8z3TD8OpGtsSRF0kaA== MIME-Version: 1.0 X-Received: by 10.140.196.69 with SMTP id r66mr2304705qha.40.1450414242795; Thu, 17 Dec 2015 20:50:42 -0800 (PST) Sender: wlosh@bsdimp.com Received: by 10.140.27.181 with HTTP; Thu, 17 Dec 2015 20:50:42 -0800 (PST) X-Originating-IP: [50.253.99.174] Date: Thu, 17 Dec 2015 21:50:42 -0700 X-Google-Sender-Auth: m8DIYgUPrHVUgPTny6gcdCuPKT0 Message-ID: Subject: New CAM I/O Scheduler From: Warner Losh To: scsi@freebsd.org Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.20 X-BeenThere: freebsd-scsi@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: SCSI subsystem List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 18 Dec 2015 04:50:44 -0000 I've put up the I/O scheduler that I've been working on into phabricator for review. A number of items likely will peel off this review, since it also has the NCQ support and a few other things. https://reviews.freebsd.org/D4609 Please comment in the review. For background see http://people.freebsd.org/~imp/talks/bsd2015/iosched-v3.pdf Warner