Re: 2.5.66 x86_64 oops when swapoff via IA32 emulation

[mikpe@csd.uu.se]

Andi Kleen writes:
 > On Thu, Apr 03, 2003 at 06:54:41PM +0200, mikpe@csd.uu.se wrote:
 > > Andi Kleen writes:
 > >  > On Thu, Apr 03, 2003 at 04:56:31PM +0200, mikpe@csd.uu.se wrote:
 > >  > > I got this oops from swapoff when shutting down 2.5.66 on
 > >  > > x86_64 with 32-bit user-space (RH8.0). This was from the first
 > >  > > run with 2.5.66, I wasn't able to reproduce it in later runs.
 > >  > 
 > >  > Is this on the Simulator or on a real Opteron/Athlon64? 
 > > 
 > > Simics.
 > 
 > Don't know what it could be then. Can you reproduce it ? 

Eventually I was able to reproduce it. The oops was the same as before,
from swapoff at shutdown.

What I did this time was to boot with mem=32M, and just run a silly
'cd /; tar cf - . --totals > /dev/null' command.
/proc/swaps showed no swap usage before shutdown, but apparently
something bad happended anyway.

(Running under Simics is slow enough that I don't build the kernels
or anything else on the "box" itself. So it only sees brief boot-and-
see-if-it-works-then-shutdown usage.)

/Mikael