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Date: Thu, 02 Oct 2008 20:20:18 +0200 From: "Bernard, f6bvp" <f6bvp@...e.fr> To: Jarek Poplawski <jarkao2@...il.com> Cc: Linux Netdev List <netdev@...r.kernel.org>, Ralf Baechle DL5RB <ralf@...ux-mips.org> Subject: Re: ax25 rose Re: kernel panic linux-2.6.27-rc7 Hi Jarek, Finally I am able to access the faulty 2.6.27-rc7 f6bvp-9 system via ssh. I can read /var/log/kernel/message file immediately after a kernel failure and a reboot. When this is done, the system is stable until I start FPAC suite applications (fpad, fpacwpd ...) as shown below. Oct 2 16:50:00 f6bvp-9 kernel: AX25_DBG: c36fc338, 00000000, 1, 0, 0 Oct 2 16:50:00 f6bvp-9 kernel: AX25_DBG: c36fc008, 00000000, 1, 1, 0 Oct 2 16:50:00 f6bvp-9 kernel: AX25_DBG: c36fc338, 00000000, 1, 0, 0 Oct 2 16:50:00 f6bvp-9 kernel: AX25_DBG: c36fc008, 00000000, 1, 1, 0 Oct 2 16:50:09 f6bvp-9 fpad: starting FPAD Oct 2 16:50:09 f6bvp-9 kernel: AX25_DBG: c691a688, 00000000, 2, 2, 17 Oct 2 16:50:09 f6bvp-9 kernel: AX25_DBG: c15245f0, 00000000, 11, 5, 0 Oct 2 16:50:09 f6bvp-9 kernel: AX25_DBG: c691a688, 00000000, 2, 2, 17 Oct 2 16:50:09 f6bvp-9 kernel: AX25_DBG: c691a688, 00000000, 2, 2, 17 Oct 2 16:50:09 f6bvp-9 fpad: FPAD becomes a daemon Oct 2 16:50:09 f6bvp-9 fpacwpd[5169]: Starting Oct 2 16:50:09 f6bvp-9 kernel: AX25_DBG: c691a688, 00000000, 2, 2, 17 Oct 2 16:50:10 f6bvp-9 last message repeated 6 times Oct 2 16:50:10 f6bvp-9 ax25ipd: assemble_kiss: dumped - control byte non-zero Oct 2 16:50:10 f6bvp-9 kernel: mkiss: ax4: Trying crc-smack Oct 2 16:50:10 f6bvp-9 kernel: AX25_DBG: c691a688, 00000000, 2, 2, 17 Oct 2 16:50:10 f6bvp-9 last message repeated 7 times Oct 2 16:50:10 f6bvp-9 fpad: FPAD opened WP service Oct 2 16:50:11 f6bvp-9 ax25ipd: assemble_kiss: dumped - control byte non-zero Oct 2 16:50:11 f6bvp-9 kernel: mkiss: ax4: Trying crc-flexnet Oct 2 16:50:11 f6bvp-9 kernel: mkiss: ax0: Trying crc-smack Oct 2 16:50:13 f6bvp-9 kernel: AX25_DBG: c1520630, 00000000, 11, 5, 0 Oct 2 16:50:16 f6bvp-9 ax25ipd: from_kiss: dumped - cannot figure out where to send this! Oct 2 16:50:16 f6bvp-9 kernel: mkiss: ax0: Trying crc-flexnet Oct 2 16:50:18 f6bvp-9 ax25ipd: from_kiss: dumped - cannot figure out where to send this! Oct 2 16:50:21 f6bvp-9 kernel: AX25_DBG: c36090e0, 00000000, 3, 2, 207 Oct 2 16:50:21 f6bvp-9 kernel: mkiss: ax1: Trying crc-smack Oct 2 16:50:22 f6bvp-9 ax25ipd: from_kiss: dumped - cannot figure out where to send this! Oct 2 16:50:25 f6bvp-9 kernel: AX25_DBG: c14662d0, 00000000, 11, 5, 0 Oct 2 16:50:26 f6bvp-9 kernel: mkiss: ax1: Trying crc-flexnet Oct 2 16:50:28 f6bvp-9 kernel: AX25_DBG: c4cd0a68, 00000000, 11, 5, 0 Oct 2 16:50:28 f6bvp-9 ax25ipd: from_kiss: dumped - cannot figure out where to send this! Oct 2 16:50:30 f6bvp-9 kernel: AX25_DBG: c691a688, 00000000, 2, 2, 17 Oct 2 16:50:30 f6bvp-9 last message repeated 2 times Oct 2 16:50:31 f6bvp-9 ax25ipd: from_kiss: dumped - cannot figure out where to send this! Oct 2 16:50:31 f6bvp-9 kernel: AX25_DBG: c146a5d0, 00000000, 11, 5, 0 Oct 2 16:50:31 f6bvp-9 kernel: AX25_DBG: c36090e0, 00000000, 3, 2, 207 Oct 2 16:50:31 f6bvp-9 kernel: mkiss: ax3: Trying crc-smack Oct 2 16:50:33 f6bvp-9 ax25ipd: from_kiss: dumped - cannot figure out where to send this! Oct 2 16:53:21 f6bvp-9 syslogd 1.4.2: restart. Oct 2 16:53:22 f6bvp-9 kernel: klogd 1.4.2, log source = /proc/kmsg started. Oct 2 16:53:23 f6bvp-9 kernel: Linux version 2.6.27-rc7 (root@...vp-9) (gcc version 4.2.2 20071128 (prerelease) (4.2.2-3.1mdv2008.0)) #3 Tue Sep 30 10:55:01 CEST 2008 Oct 2 16:53:23 f6bvp-9 kernel: BIOS-provided physical RAM map: Oct 2 16:53:23 f6bvp-9 kernel: BIOS-e820: 0000000000000000 - 00000000000a0000 (usable) Oct 2 16:53:23 f6bvp-9 kernel: BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved) Oct 2 16:53:23 f6bvp-9 kernel: BIOS-e820: 0000000000100000 - 0000000008000000 (usable) Oct 2 16:53:23 f6bvp-9 kernel: BIOS-e820: 00000000ffff0000 - 0000000100000000 (reserved) Oct 2 16:53:23 f6bvp-9 kernel: last_pfn = 0x8000 max_arch_pfn = 0x100000 Oct 2 16:53:23 f6bvp-9 kernel: RAMDISK: 07f2a000 - 07fef581 Although I did not change anything, and contrarily to my previous observation, the system instability as shown above occurs systematically. There was no problem with Kernel 2.6.25-10 I was using before (with patches for AX25 and ROSE that are now included in 2.6.27-rc7). I did not try 2.6.26 on this machine, thus I cannot tell if the bug was already present. Would it be worth to test 2.6.26 ? With the SSH limited access I have from my remote site, can I continue this debuging effort constructively, or do we wait until I am back in front of the local console ? Bernard Le mercredi 01 octobre 2008 à 05:58 +0000, Jarek Poplawski a écrit : > On Wed, Oct 01, 2008 at 12:49:02AM +0200, Bernard Pidoux F6BVP wrote: > > Jarek, > > > > With the patch #2, there have been only one reboot after the machine was > > frozen. I did not notice that was happening for there was no kernel > > panic message but a frozen display only. > > Then I could only write down partially the values displayed after > > AX25_DBG: c446c220, c..... 3, 5, 240 > > Second number was not 000000 as it is most of the time. > > The machine rebooted after the usual 60 seconds delay and since then > > there was no kernel panic. > > This is the first time kernel 2.6.27-rc7 does not panic within a minute. > > The system is up since about 20 minutes now with frequent AX25_DBG messages. > > Hmm... Since this was intended mainly for debugging something went > wrong. (I expected to get at least one warning.) > > > > > I am sorry that I must go to sleep now to be at work early in the morning. > > I will be away from my Linux box for a few days. > > Then we should probably interrupt this interesting bug hunting. > > I will send more results when I am back. > > OK, I'll try to look at this in the meantime. > > Cheers, > Jarek P. > -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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