Messages in this thread | | | From | Keith Owens <> | Subject | Re: 2.4.20 st + aic7xxx (Adaptec 19160B) + VIA KT333 repeatable freeze | Date | Sun, 15 Dec 2002 22:42:40 +1100 |
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On Fri, 13 Dec 2002 11:51:27 +1100, Kevin Easton <kevin@sylandro.com> wrote: >I'm not sure exactly where this problem fits in, but I'm getting a >completely repeatable freeze (100% lockup, no response to keyboard) >triggered by writing to /dev/st0 (dd if=/dev/urandom of=/dev/st0 bs=512 >count=163840 will reproduce it). >So... does anyone have any ideas how I should start trying to track this >down?
Boot with nmi_watchdog=1 (smp) or nmi_watchdog=2 (smp or up), cat /proc/interrupts to verify that NMI is being used. If the problem is a disabled spinloop then the watchdog will trip after 5 seconds and give you a trace which can be run through ksymoops. If that trace does not give enough data to debug the problem, apply the kdb patch[*], read Documentation/kdb and start digging, bt first and debug from there.
[*] ftp://oss.sgi.com/projects/kdb/download/v2.5/ kdb-v2.5-2.4.19-common-1.bz2 + kdb-v2.5-2.4.19-i386-1.bz2 or kdb-v2.5-2.4.20-common-1.bz2 + kdb-v2.5-2.4.20-i386-1.bz2
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