Date: Thu, 01 May 2003 10:20:04 -0700 From: Simon Walton <simonw@matteworld.com> To: Matthias Buelow <mkb@mukappabeta.de> Cc: freebsd-bugs@FreeBSD.org Subject: Re: i386/43491: microuptime () went backwards Message-ID: <3EB15744.93CBA39E@matteworld.com> References: <200304252230.h3PMUGFS078258@freefall.freebsd.org> <20030426193033.GI1356@moghedien.mukappabeta.net>
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> > Just to add to the record, I have seen this to also be part > of the effects of a broken SCSI drive, apparently with the drive's > electronics gone stale. Sometimes just a massive stream of the > above microuptime()... messages whenever the disk was accessed, > and after some time (but not always) followed by a total lockup > with a bus reset every second (but sometimes just thousands of > microuptime() messages, system was going normal apart from that, > except for time+date and the logfile filling, of course.) > Removing the drive fixed that. I've noticed that the errors sometimes correspond to heavy disk use (on either of its two disks), but I am not seeing bus resets and the disks otherwise seem fine. I can clear the condition by setting the i8254 frequency with sysctl -w machdep.i8254_freq, even if I don't actually change the frequency. I've also noticed this message on startup APIC_IO: MP table broken: 8259->APIC entry missing! so I suspect my problem is related to APIC interrupts. Simon
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