From owner-freebsd-hackers@FreeBSD.ORG Wed Jul 16 04:43:49 2003 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 031CD37B401 for ; Wed, 16 Jul 2003 04:43:49 -0700 (PDT) Received: from mailout.informatik.tu-muenchen.de (mailout.informatik.tu-muenchen.de [131.159.0.5]) by mx1.FreeBSD.org (Postfix) with ESMTP id 14CDD43F3F for ; Wed, 16 Jul 2003 04:43:48 -0700 (PDT) (envelope-from langd@informatik.tu-muenchen.de) Date: Wed, 16 Jul 2003 13:43:46 +0200 From: Daniel Lang To: freebsd-hackers@freebsd.org Message-ID: <20030716114346.GE2190@atrbg11.informatik.tu-muenchen.de> References: <20030704094935.GA335@atrbg11.informatik.tu-muenchen.de> <20030704130345.GA348@atrbg11.informatik.tu-muenchen.de> <20030708184838.GB26342@melusine.cuivre.fr.eu.org> Mime-Version: 1.0 Content-Type: multipart/signed; protocol="application/x-pkcs7-signature"; micalg=sha1; boundary="K/NRh952CO+2tg14" Content-Disposition: inline In-Reply-To: <20030708184838.GB26342@melusine.cuivre.fr.eu.org> X-Geek: GCS/CC d-- s: a- C++$ UBS++++$ P+++$ L- E-(---) W+++(--) N++ o K w--- O? M? V? PS+(++) PE--(+) Y+ PGP+ t++ 5+++ X R+(-) tv+ b+ DI++ D++ G++ e+++ h---(-) r++>+++ y+ User-Agent: Mutt/1.5.1i X-Virus-Scanned: by amavisd-new at informatik.tu-muenchen.de Subject: Re: atapicam hangs system X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Jul 2003 11:43:49 -0000 --K/NRh952CO+2tg14 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi hackers, following a problem I currently discuss with Thomas (maintainer of atapicam). Since it turned into some kernel debugging issues, I think I could use input from -hackers, as well. Summary: System (SCSI bus?) hangs, after using an ATAPI CD-RW device via the atapicam layer. atapicam is the only ATA device option in the kernel (so no acd# devices, just cd#). Original Message follows: Thomas Quinot wrote on Tue, Jul 08, 2003 at 08:48:38PM +0200: [..] > Your problem sounds like the ATA bus hanging. When it hangs and you can > still access your xterms, it would be nice to see what dmesg says. > You can also try to trigger the hang outside of X, and see if there are > messages on the console. Another possible solution is to drop into DDB > using Ctrl+Alt+Esc, and then manually trigger a panic. [..] > BTW, you're using the latest -STABLE kernel, right? [..] So, back in the office, I went back to the issue. Before anything else, I've updated my system to 4.8-STABLE, then built a debugging kernel with options DDB. uname -a: FreeBSD atrbg11.informatik.tu-muenchen.de 4.8-STABLE FreeBSD 4.8-STABLE #19= : MonJul 14 18:17:20 CEST 2003 root@atrbg11.informatik.tu-muenchen.de:/= usr/obj/usr/src/sys/ATRBG11 i386 I did not start X but worked on the console. I used cdrdao to write a cdimage: # camcontrol devlist at scbus0 target 1 lun 0 (pass0,da0) at scbus0 target 2 lun 0 (pass1,da1) at scbus1 target 0 lun 0 (pass2,cd0) at scbus2 target 0 lun 0 (pass3,cd1) The last one is the cd writer I've used with the following command: # cdrdao write --device 2,0,0 --driver generic-mmc --speed 48 -v 2 -n bla.t= oc After two successful writes, the system hung again, as before. Unfortunately there are _no_ messages on the console. I entered the debugger with Ctrl-Alt-Esc and did a trace. I did not copy everything, because I thought I could use gdb -k later on (I was wrong). However, what I've saved from the trace was: Apparently the system hung in camisr(c02f3250,c02b7078,c253aa3,0,10) at camisr+0x8f eip: 0xc01279d7, esp: 0xc0297008, ebp: 0xc0297020 Please advice what to examine how. Forcing a panic did not work. I could call panic, but 'continue' did not write a crash dump to disk, but hung again. call boot(0) did not work, too and from this on, I could not even=20 get back into the debugger and had to hit the reset button. So it seems that scsi disk operations are not working as well, so maybe not the ATA bus is hanging but the SCSI subsystem? Remote-GDB debugging is not an option, unfortunately. I don't have another RELENG_4 machine ready. However, I have a laptop with some half-working 5.1-CURRENT. There are no 4.x sources on it... maybe it could work, if I copy the source tree, but I would like to have some confirmation, that it works, before I put effort into this. Please advise. :) Best regards, Daniel --=20 IRCnet: Mr-Spock - May His Shadow fall upon thee -=20 Daniel Lang * dl@leo.org * +49 89 289 18532 * http://www.leo.org/~dl/ --K/NRh952CO+2tg14 Content-Type: application/x-pkcs7-signature Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIIXgAYJKoZIhvcNAQcCoIIXcTCCF20CAQExCzAJBgUrDgMCGgUAMAsGCSqGSIb3DQEHAaCC FUAwggbMMIIFtKADAgECAgIVezANBgkqhkiG9w0BAQUFADCBpjELMAkGA1UEBhMCREUxETAP BgNVBAcTCE11ZW5jaGVuMSkwJwYDVQQKEyBUZWNobmlzY2hlIFVuaXZlcnNpdGFldCBNdWVu Y2hlbjEiMCAGA1UECxMZRmFrdWx0YWV0IGZ1ZXIgSW5mb3JtYXRpazEYMBYGA1UEAxMPUkJH LUJlbnV0emVyLUNBMRswGQYJKoZIhvcNAQkBFgxjYUBpbi50dW0uZGUwHhcNMDMwNTIwMTIz MTQyWhcNMDQwNTIxMDAwMDAwWjCBqzELMAkGA1UEBhMCREUxETAPBgNVBAcTCE11ZW5jaGVu MSkwJwYDVQQKEyBUZWNobmlzY2hlIFVuaXZlcnNpdGFldCBNdWVuY2hlbjEiMCAGA1UECxMZ RmFrdWx0YWV0IGZ1ZXIgSW5mb3JtYXRpazEUMBIGA1UEAxMLRGFuaWVsIExhbmcxJDAiBgkq hkiG9w0BCQEWFWRhbmllbC5sYW5nQGluLnR1bS5kZTCBnzANBgkqhkiG9w0BAQEFAAOBjQAw 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