Date: Fri, 19 Aug 2005 01:09:17 +0200 From: Bernd Walter <ticso@cicely12.cicely.de> To: harrisb@rcisd.org Cc: ticso@cicely.de, freebsd-alpha@freebsd.org Subject: Re: machine check on 4100 5.4-RELEASE Message-ID: <20050818230916.GD90999@cicely12.cicely.de> In-Reply-To: <OFEB0B9C6C.361AA7F5-ON86257061.005478FD-86257061.005467B3@rcisd.org> References: <20050818111551.GP77387@cicely12.cicely.de> <OFEB0B9C6C.361AA7F5-ON86257061.005478FD-86257061.005467B3@rcisd.org>
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On Thu, Aug 18, 2005 at 10:24:42AM -0500, harrisb@rcisd.org wrote: > Here's the panic info: > > -------------------------------------------- > Mounting root from ufs:/dev/da0a > > unexpected machine check: > > mces = 0x1 > vector = 0x670 > param = 0xfffffc0000004e10 > pc = 0xfffffc000072faa8 > ra = 0xfffffc000072bba4 > curproc = 0xfffffc002e7cc000 > pid = 693, comm = perl5.8.6 > I could be completly wrong, but vector 0x670 (on AS4100) should be CPU detected errors, such as cache failure - either B-Cache or internal, which points to a CPU module. Are they always the same, or will they happen at random times? In any case you should check the SRM error log - might be something interesting in there. If they are logged they should appear as MCHK 670 events. > On Wed, Aug 17, 2005 at 04:53:28PM -0500, harrisb@rcisd.org wrote: > > All of a sudden, I'm getting regular crashes with machine check's. > > > > I've pulled one of the 533 CPU's, which didn't help, and now am > > wondering if it's possible that my instance of Mysql with all it's > > unaligned errors > > could possibly cause it crash? I've stopped the mysql daemon for a > > while just to see if it stabilizes. Anyone have any ideas? > > > > It will crash after it's been up for days, and then immediately after > > reboot. > > Details about the machine checks would be interesting. > > Unaligned errors in userland are corrected or the appplication is > terminated, depending on configuration. > Only unaligned faults inside the kernel are fatal. > > > I keep thinking hardware, but all the srm test fine. > > Hard- and software is possible, but without further details this is > hard to say. -- B.Walter BWCT http://www.bwct.de bernd@bwct.de info@bwct.de
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