IRQ deadlocks

[Doug Ledford]

Heinz Mauelshagen wrote:

> > Disable SMP and live a happy life.  That, or downgrade the kernel to version
> > 2.0.33 and patch in the latest driver.  The thing is, I have information
> > from a kernel deadlock where in I gathered the EIP information using the
> > print EIP patch, and the deadlock isn't related to the aic7xxx driver at all
> > (however, a faster disk subsystem will trigger the problem more often).  It
> > appears to be a generic vm bug in the 34 and 35 kernels under SMP.  With SMP
> > disabled, all is fine.  With 2.0.33, all was fine.  FWIW, the bug probably
> > existed in 2.0.33 as well, but for 2.0.34 thye made a change to the vm
> > subsystem that allowed swapping of shared COW pages (which 2.0.33 didn't do)
> > and this appears to have made it much easier to trigger the actual bug,
> > which is somewhere in the fork() code.  That's my take on it anyway.
> >
> 
> Does the vm bug show up in kernel > 2.1.120 on SMP too?

No, not that I'm aware of.

-- 

 Doug Ledford  <dledford at dialnet.net>
  Opinions expressed are my own, but
     they should be everybody's.

To Unsubscribe: send mail to majordomo at FreeBSD.org
with "unsubscribe freebsd-aic7xxx" in the body of the message