Date: Sun, 14 Feb 2016 18:00:09 -0500 From: "Thomas Laus" <lausts@acm.org> To: Yamagi Burmeister <lists@yamagi.org>, freebsd-stable@freebsd.org Subject: Re: UEFI & ZFS Message-ID: <56C106F9.7785.139D57@lausts.acm.org> 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>
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> 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
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