Hello.
Wessel, Jason wrote:
> Sergei,
> If you are running with this patch you sent, this is why are you having
> problems with the swapper task getting killed on the x86_64.
Erm, probably I was. :-/
> kgdb_unset_may_fault() is responsible for restoring the preempt count.
> And if it is not in the return path from a set_longjmp, then there is no
> way to restore the preempt count.
> It may seem counter intuitive to have the mayfault setup before
> settingup up the stack for a possible return from a long jump, but that
> is the way it works right now.
Ah, got it! I forgot how setjmp() works. :-<
> Another possibility would be to split the functions to explicitly save
> the preempt count separately if you realy want to move the may_fault
> sets and unsets around.
No, that wouldn't be worth it.
There is yet another possibility would be to use *goto* ISO *return* in
the error paths, although I'm not sure that it would make the code look better.
> Jason.
MBR, Sergei
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