Date: Sat, 5 Aug 2000 07:52:49 -0500 From: David Uhring <duhring@charter.net> To: Allen Campbell <allenc@campbell.cwx.net>, stable@FreeBSD.ORG Subject: Re: Kernel bug or bad hardware? Message-ID: <00080507561800.10028@dave.uhring.com> In-Reply-To: <398BCC24.3DE06DE8@verinet.com> References: <398BCC24.3DE06DE8@verinet.com>
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On Sat, 05 Aug 2000, Allen Campbell wrote: > I am experiencing infrequent, spontaneous panics of a 4.0-STABLE > machine. The reboots occur while the system is under light load. > > When the panic occurs the following output is generated by a kernel > trap. I have witnessed this on three occasions. On the most recent > I bolted to the server and hit PAUSE to preserve the output long > enough to copy it verbatim. > > > ad0: WRITE command timeout - resetting > ata0: resetting devices .. done > ad0: timeout waiting for DRQad-106100774: soft error ECC corrected > ad-106100774: timeout waiting for DRQdevstat_end_transaction: HELP!! > busy count for (?CA1062206520 is < 0 (-1061721857)! > > Fatal trap 12: page fault while in kernel mode > fault virtual address = 0x60 > fault code = supervisor read, page not present > instruction pointer = 0x8:0xc0173e8c > stack pointer = 0x10:0xc0290aec > frame pointer = 0x10:0xc0290b1c > code segment = base 0x0, limit 0xfffff, type 0x1b > = DPL 0, pres 1, def32 1, gran 1 > processor eflags = interrupt enabled, resume, IOPL = 0 > current process = Idle > interrupt mask = bio > trap number = 12 > panic: page fault > > syncing disks... > > > At this point the machine boots, fsck runs to clean up the disks and > the machine runs normally. On each occasion the output began with: > `ad0: WRITE command timeout - resetting'. This makes me think the > problem is not related to faulty memory, but possibly a bad IDE disk > or a kernel bug. Other than this problem the machine runs perfectly. > > uname -a: > > FreeBSD const. 4.0-STABLE FreeBSD 4.0-STABLE #0: Sat Jul 1 21:46:49 MDT > 2000 > allenc@pragma.:/usr/src/sys/compile/CONST i386 > > My most recent STABLE update was performed to obtain fixes for the > TCP/IP ICMP bugs reported recently. > > dmesg output: > ------- snip ---------- My system suffered from the same problem, but on more recent cvsupdates the problem disappeared. Now running 4.1-STABLE as of 31 July. Suggest you upgrade. Dave To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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