From owner-freebsd-stable@freebsd.org Thu Mar 16 07:52:19 2017 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 8DE59D0F928 for ; Thu, 16 Mar 2017 07:52:19 +0000 (UTC) (envelope-from avg@FreeBSD.org) 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 7AD521F7D for ; Thu, 16 Mar 2017 07:52:19 +0000 (UTC) (envelope-from avg@FreeBSD.org) Received: by mailman.ysv.freebsd.org (Postfix) id 7A21BD0F927; Thu, 16 Mar 2017 07:52:19 +0000 (UTC) Delivered-To: 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 79C61D0F926 for ; Thu, 16 Mar 2017 07:52:19 +0000 (UTC) (envelope-from avg@FreeBSD.org) Received: from citapm.icyb.net.ua (citapm.icyb.net.ua [212.40.38.140]) by mx1.freebsd.org (Postfix) with ESMTP id C943F1F7A for ; Thu, 16 Mar 2017 07:52:18 +0000 (UTC) (envelope-from avg@FreeBSD.org) Received: from porto.starpoint.kiev.ua (porto-e.starpoint.kiev.ua [212.40.38.100]) by citapm.icyb.net.ua (8.8.8p3/ICyb-2.3exp) with ESMTP id JAA09827; Thu, 16 Mar 2017 09:52:09 +0200 (EET) (envelope-from avg@FreeBSD.org) Received: from localhost ([127.0.0.1]) by porto.starpoint.kiev.ua with esmtp (Exim 4.34 (FreeBSD)) id 1coQCf-0000qU-8U; Thu, 16 Mar 2017 09:52:09 +0200 Subject: Re: moutnroot failing on zpools in Azure after upgrade from 10 to 11 due to lack of waiting for da0 To: stable@FreeBSD.org References: <20170313190728.GA2967@brick> Cc: Pete French From: Andriy Gapon Message-ID: Date: Thu, 16 Mar 2017 09:51:13 +0200 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 MIME-Version: 1.0 In-Reply-To: <20170313190728.GA2967@brick> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 16 Mar 2017 07:52:19 -0000 On 13/03/2017 21:07, Edward Tomasz Napierała wrote: > Are you sure the above transcript is right? There are three reasons > I'm asking. First, you'll see the "Root mount waiting" message, > which means the root mount code is, well, waiting for storvsc, exactly > as expected. Second - there is no "Trying to mount root". But most > of all - for some reason the "Mounting failed" is shown _before_ the > "Root mount waiting", and I have no idea how this could ever happen. Edward, your observation is not completely correct. https://www.twisted.org.uk/~pete/914893a3-249e-4a91-851c-f467fc185eec.txt We have: Trying to mount root from zfs:rpool/ROOT/default []... <=== vmbus0: version 3.0 ... storvsc0: on vmbus0 Solaris: NOTICE: Cannot find the pool label for 'rpool' Mounting from zfs:rpool/ROOT/default failed with error 5. <=== Root mount waiting for: storvsc <=== ... So, the kernel attempted to mount the root even before vmbus was attached and, thus, before storvsc appeared and informed the kernel that it might be holding the root. How ZFS was supposed to know that vmbus is ever going to appear? To me this sounds more like a problem with the Hyper-V drivers. -- Andriy Gapon