[parisc-linux] SMP kernel problems on a D350

[Grant Grundler]

Randolph Chung wrote:
> legolas:/home/randolph# cat /proc/sys/kernel/unaligned 
> Unaligned trap handler is enabled
> legolas:/home/randolph# ./t; echo $?
> 0
> legolas:/home/randolph# echo 0 >> /proc/sys/kernel/unaligned 

Cool!
After reviewing the diff (on ftp.p-l.o/patches), only two nits
that have nothing to do with the code:

o cat output should relate to what I have to "echo" into the /proc file.
  ie only display '0' or '1' when catting.
  Or is "blah is enabled" by convention?

o SYSCTL_FILENAME should be "sys/kernel/unaligned_trap"
  and then I think 0 or 1 should be clear enough to anyone
  daring to mess with it.


> if someone can review this real quick before i commit it to cvs,

If you don't like my suggestions, I'm ok with committing
what you've already got.

> i'd
> appreciate it. in particular, the point where it decides that the
> unaligned trap is not enabled and forces the SIGBUS is not exactly at
> the beginning of the trap handler -- it still prints the unaligned
> message.... 

hmmm...if running under a debugger, one gets that info anyway.
But that's not always easy to do. I think it's ok since we don't
like to see unligned traps happen anyway.

Maybe a "unaligned_trap_msg" tunable?
/me runs...

thanks
grant