From owner-freebsd-stable@freebsd.org Sun Feb 14 23:00:17 2016 Return-Path: Delivered-To: freebsd-stable@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 0E33CAA8D88 for ; Sun, 14 Feb 2016 23:00:17 +0000 (UTC) (envelope-from lausts@acm.org) Received: from cdptpa-oedge-vip.email.rr.com (cdptpa-outbound-snat.email.rr.com [107.14.166.232]) by mx1.freebsd.org (Postfix) with ESMTP id CDA9713DD for ; Sun, 14 Feb 2016 23:00:16 +0000 (UTC) (envelope-from lausts@acm.org) Received: from [173.88.10.122] ([173.88.10.122:33111] helo=mail.laus.org) by cdptpa-oedge02 (envelope-from ) (ecelerity 3.5.0.35861 r(Momo-dev:tip)) with ESMTP id AF/D7-17124-FF601C65; Sun, 14 Feb 2016 23:00:15 +0000 Received: from [192.168.1.100] (laust2 [192.168.1.100]) by mail.laus.org (8.15.2/8.15.2) with ESMTPS id u1EN0EN9003255 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Sun, 14 Feb 2016 18:00:14 -0500 (EST) (envelope-from lausts@acm.org) X-Authentication-Warning: mail.laus.org: Host laust2 [192.168.1.100] claimed to be [192.168.1.100] From: "Thomas Laus" Organization: ABB To: Yamagi Burmeister , freebsd-stable@freebsd.org Date: Sun, 14 Feb 2016 18:00:09 -0500 Subject: Re: UEFI & ZFS Reply-to: lausts@acm.org Message-ID: <56C106F9.7785.139D57@lausts.acm.org> Priority: normal In-reply-to: <20160214132749.efba24a6855e37855d3cbaa9@yamagi.org> References: <56BE423A.12522.27C542@lausts.acm.org>, <3F76A980-AD77-4C77-BC0B-1B60D2351721@cs.huji.ac.il>, <20160214132749.efba24a6855e37855d3cbaa9@yamagi.org> X-mailer: Pegasus Mail for Windows (4.70) X-RR-Connecting-IP: 107.14.168.130:25 X-Cloudmark-Score: 0 X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 14 Feb 2016 23:00:17 -0000 > I've observed the slowness only on the local console, I haven't tested > the seriel console. Put the FreeBSD legcay installation usb stick into > the box, select it as boot device and watch the cursor spinning for > about 10 minutens until the kernel boots. Do the same with an UEFI > installation stick and it's a matter of seconds... > > I've seen this on an Gigabyte GA-Z170XP-SLI with a Core i7 6700k and on > two Supermicro X11SBA-LN4F based machines with Skylake Xeon CPUs. There > are several other reports of slow boot on Skylake CPUs on the net. In > the thread mentioned below some changes in the hardware, the firmware > or somewhere else were suspected. I didn't even try to debug it,instead > I went with the UEFI loader. > Yamagi: My experience is the same as yours, but only with the combination of Legacy BIOS and ZFS installation. UEFI loading of a ZFS filesystem is also a matter of seconds. So is a Legacy/GPT/UFS installation. I only see this on my i5 Skylake when I perform a non-UEFI instalation using the ZFS filesystem. I get a rapid boot with both OpenBSD 5.8 and using a MSDOS 6.22 USB floppy. I have seen some patches posted to this list for testing. I'll report back with my results. I can't use UEFI because this will be a XEN server and UEFI support is not in the XEN kernel yet. Tom -- Public Keys: PGP KeyID = 0x5F22FDC1 GnuPG KeyID = 0x620836CF