From nobody Fri Dec 24 15:31:29 2021 X-Original-To: hackers@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 D4DBE191000B for ; Fri, 24 Dec 2021 15:31:37 +0000 (UTC) (envelope-from jhs@berklix.com) Received: from land.berklix.org (land.berklix.org [144.76.10.75]) by mx1.freebsd.org (Postfix) with ESMTP id 4JL9yc6BSnz4cdw; Fri, 24 Dec 2021 15:31:36 +0000 (UTC) (envelope-from jhs@berklix.com) Received: from mart.js.berklix.net (p4fc4c12a.dip0.t-ipconnect.de [79.196.193.42]) (authenticated bits=128) by land.berklix.org (8.15.2/8.15.2) with ESMTPA id 1BOFVTu6037020; Fri, 24 Dec 2021 15:31:30 GMT (envelope-from jhs@berklix.com) Received: from fire.js.berklix.net (fire.js.berklix.net [192.168.91.41]) by mart.js.berklix.net (8.14.3/8.14.3) with ESMTP id 1BOFVOnr049062; Fri, 24 Dec 2021 16:31:24 +0100 (CET) (envelope-from jhs@berklix.com) Received: from fire.js.berklix.net (localhost [127.0.0.1]) by fire.js.berklix.net (8.16.1/8.16.1) with ESMTP id 1BOFVTKv003800; Fri, 24 Dec 2021 16:31:30 +0100 (CET) (envelope-from jhs@berklix.com) Message-Id: <202112241531.1BOFVTKv003800@fire.js.berklix.net> To: Kyle Evans cc: "freebsd-hackers@freebsd.org" Subject: Re: /boot/loader.conf debuging traces come out jumbled From: "Julian H. Stacey" Organization: http://berklix.com/jhs/ User-agent: EXMH on FreeBSD http://berklix.com/free/ X-From: http://www.berklix.org/~jhs/ In-reply-to: Your message "Mon, 13 Dec 2021 18:17:52 -0600." List-Id: Technical discussions relating to FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-hackers List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-hackers@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <3798.1640359889.1@fire.js.berklix.net> Content-Transfer-Encoding: quoted-printable Date: Fri, 24 Dec 2021 16:31:29 +0100 X-Rspamd-Queue-Id: 4JL9yc6BSnz4cdw X-Spamd-Bar: - Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=none (mx1.freebsd.org: domain of jhs@berklix.com has no SPF policy when checking 144.76.10.75) smtp.mailfrom=jhs@berklix.com X-Spamd-Result: default: False [-2.00 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; FREEFALL_USER(0.00)[jhs]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[berklix.com]; AUTH_NA(1.00)[]; HAS_ORG_HEADER(0.00)[]; RCVD_COUNT_THREE(0.00)[4]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; TO_DN_ALL(0.00)[]; NEURAL_HAM_SHORT(-1.00)[-1.000]; RCPT_COUNT_TWO(0.00)[2]; R_SPF_NA(0.00)[no SPF record]; RCVD_NO_TLS_LAST(0.10)[]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:24940, ipnet:144.76.0.0/16, country:DE]; RECEIVED_SPAMHAUS_PBL(0.00)[79.196.193.42:received] X-ThisMailContainsUnwantedMimeParts: N Hi, Reference: > From: Kyle Evans > Date: Mon, 13 Dec 2021 18:17:52 -0600 Kyle Evans wrote: > On Mon, Dec 13, 2021 at 6:07 PM Julian H. Stacey wrote= : > > > > Debugging my /boot/loader.conf on 12.2-STABLE (with a 12.2-RELEASE ker= nel, > > > > (as 12.2-STABLE & 12.3-RELEASE & 13.0-RELEASE GENERIC kernels crash = during > > boot on one machine here (To be subject of later analysis & > > posting)... I got distracted onto debugging boot options, after > > output from booting screen rolled off the top), So I concentrated > > first on identifying & hashing out noisey boot options , before > > next searching how to capture boot text (maybe to a serial port ?) = ) > > > > I tried adding markers to loader.conf create deliberate visible error = texts to > > mark around lines I wanted to study the effect of, eg > > fuse_load=3D"YES" etc ... > > > > I added this in the middle of /boot/loader.conf : > > ZZZZZZZZZ00000000_load=3D"YES" > > ZZZZZZZZZ00001111_load=3D"YES" > > ZZZZZZZZZ00002222_load=3D"YES" > > ZZZZZZZZZ44440000_load=3D"YES" > > ZZZZZZZZZ44441111_load=3D"YES" > > ZZZZZZZZZ44442222_load=3D"YES" > > > > & next boot showed a weirdly disordered: > > > > Loading configured modules... > > can't find 'ZZZZZZZZZ00000000_load' > > can't find 'ZZZZZZZZZ00002222_load' > > can't find 'ZZZZZZZZZ44442222_load' > > can't find 'ZZZZZZZZZ44440000_load' > > can't find 'ZZZZZZZZZ44441111_load' > > can't find 'ZZZZZZZZZ00001111_load' > > /etc/hostid size=3D0x25 > > > > its not even just a reverse order that one might have expected from > > a forth unstacker or some such. Makes it harder to trace what output > > lines come from which loader.conf lines. > > > > To my knowledge, we've never guaranteed module load order beyond > kernel-first then everything else. You'll have a much better time with > _before/_after though; something like this should work: > > hostid_before=3D"echo before hostid" > hostid_after=3D"echo after hostid" Thanks Kyle for your _before & _after, it set me on course, though there's no hostid_load=3D in 12.2 src/, these worked: usb_quirk_load=3D"YES" usb_quirk_before=3D"echo Before usb_quirk" usb_quirk_after=3D"echo After usb_quirk" & I found lots of useful debugging stuff in /boot/defaults/loader.conf & man loader.conf loader boot. My next use will be boot -p or boot_pause=3D"" # -p: Pause after each line during device probing & then maybe some of: #boot_ddb=3D"" # -d: Instructs the kernel to start in the DDB debug= ger #boot_gdb=3D"" # -g: Selects gdb-remote mode for the kernel debugge= r #boot_multicons=3D"" # -D: Use multiple consoles #boot_serial=3D"" # -h: Use serial console #boot_verbose=3D"" # -v: Causes extra debugging information to be print= ed #debug.kdb.break_to_debugger=3D"0" # Allow console to break into debugger. Looking forward to debugging now screen doesnt roll off :-) Cheers, -- = Julian Stacey http://berklix.com/jhs/ http://stolenvotes.uk Reduce contacts, vax & pass insufficient. Dump UK's prime liar.