From nobody Mon May 09 08:04:05 2022 X-Original-To: freebsd-current@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 86E241ACCB33 for ; Mon, 9 May 2022 08:04:32 +0000 (UTC) (envelope-from dch@skunkwerks.at) Received: from out4-smtp.messagingengine.com (out4-smtp.messagingengine.com [66.111.4.28]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4KxYbz2qQGz4c7D for ; Mon, 9 May 2022 08:04:31 +0000 (UTC) (envelope-from dch@skunkwerks.at) Received: from compute2.internal (compute2.nyi.internal [10.202.2.46]) by mailout.nyi.internal (Postfix) with ESMTP id 8AE6F5C0108; Mon, 9 May 2022 04:04:25 -0400 (EDT) Received: from imap44 ([10.202.2.94]) by compute2.internal (MEProxy); Mon, 09 May 2022 04:04:25 -0400 DKIM-Signature: v=1; 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Mon, 9 May 2022 04:04:25 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface User-Agent: Cyrus-JMAP/3.7.0-alpha0-591-gfe6c3a2700-fm-20220427.001-gfe6c3a27 List-Id: Discussions about the use of FreeBSD-current List-Archive: https://lists.freebsd.org/archives/freebsd-current List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-current@freebsd.org Mime-Version: 1.0 Message-Id: <481e0739-bdc4-4ce6-a856-a80cf5294d03@www.fastmail.com> In-Reply-To: References: Date: Mon, 09 May 2022 08:04:05 +0000 From: "Dave Cottlehuber" To: "Michael Schuster" , "Wes Maag" Cc: freebsd-current Subject: Re: FreeBSD, boot environments and /dev Content-Type: text/plain X-Rspamd-Queue-Id: 4KxYbz2qQGz4c7D X-Spamd-Bar: --- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=skunkwerks.at header.s=fm2 header.b=Zmk5VIKb; dkim=pass header.d=messagingengine.com header.s=fm1 header.b="R 3XdR95"; dmarc=none; spf=pass (mx1.freebsd.org: domain of dch@skunkwerks.at designates 66.111.4.28 as permitted sender) smtp.mailfrom=dch@skunkwerks.at X-Spamd-Result: default: False [-3.59 / 15.00]; XM_UA_NO_VERSION(0.01)[]; RWL_MAILSPIKE_GOOD(0.00)[66.111.4.28:from]; MV_CASE(0.50)[]; R_SPF_ALLOW(-0.20)[+ip4:66.111.4.28]; RCVD_COUNT_THREE(0.00)[4]; TO_DN_ALL(0.00)[]; DKIM_TRACE(0.00)[skunkwerks.at:+,messagingengine.com:+]; NEURAL_HAM_SHORT(-1.00)[-1.000]; FREEMAIL_TO(0.00)[gmail.com]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_LAST(0.00)[]; ASN(0.00)[asn:19151, ipnet:66.111.4.0/24, country:US]; RCVD_IN_DNSWL_LOW(-0.10)[66.111.4.28:from]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[skunkwerks.at:s=fm2,messagingengine.com:s=fm1]; FREEFALL_USER(0.00)[dch]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; NEURAL_HAM_LONG(-1.00)[-0.999]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[skunkwerks.at]; DWL_DNSWL_LOW(-1.00)[messagingengine.com:dkim]; TO_MATCH_ENVRCPT_SOME(0.00)[]; MLMMJ_DEST(0.00)[freebsd-current]; MID_RHS_WWW(0.50)[] X-ThisMailContainsUnwantedMimeParts: N On Mon, 9 May 2022, at 06:25, Michael Schuster wrote: > On Fri, May 6, 2022 at 12:15 AM Wes Maag wrote: >> >> >> On Thu, May 5, 2022 at 4:10 PM Michael Schuster wrote: >>> Hi all, >>> >>> while still working (slowly) on an answer to my own question on the >>> right workflow to keep current up to date reliably with boot >>> environments, I noticed that after creating and mounting a new BE, >>> that new BE's /dev (eg /mnt/dev) is very sparsely populated: This is expected; /dev would usually be empty until devfs is mounted. Looking into the unmounted /dev via the last zfs snapshot of your / filesystem should also be empty: $ ls -AFGhl /.zfs/snapshot/$(ls -rt /.zfs/snapshot/ | tail -1)/dev total 0 If it's not I'd guess these are stray garbage from BE experiments where /dev wasn't mounted and various scripts & tools tried to pipe via /dev/{fd,zero,null,...}. If you created a hypothetical "empty" BE from scratch, unpacked src tarballs into it, it would also be empty. A+ Dave