2.5.43 IO-APIC bug and spinlock deadlock

From: Doug Ledford (dledford@redhat.com)
Date: Wed Oct 16 2002 - 22:33:02 EST

IO-APIC bug: regular kernel, UP, no IO-APIC or APIC on UP enabled, compile
fails (does *everyone* run SMP or at least UP + APIC now?)

spinlock deadlock: run an smp kernel on a up machine. On mine here all I
have to do is try to boot to multiuser mode, it won't make it through the
startup scripts before it locks up by trying to reenter common_interrupt
on the only CPU. Seems like an SMP kernel on UP hardware doesn't disable
interrupts properly maybe? I get task lists via alt-sysreq when the
machine should be hardlocked I think. Anyway, this is what has been
tricking me into thinking I had an IDE problem. IDE is innocent, it's the
core interrupt handling code.

Back to work on scsi stuff now that I have a decently running 2.5.43
system, I'll let someone else deal with these.

  Doug Ledford <dledford@redhat.com>     919-754-3700 x44233
         Red Hat, Inc. 
         1801 Varsity Dr.
         Raleigh, NC 27606
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This archive was generated by hypermail 2b29 : Wed Oct 23 2002 - 22:00:32 EST