* Ingo Molnar <[email protected]> wrote:
>
> * Andy Lutomirski <[email protected]> wrote:
>
> > This sets up stack switching, including for SYSCALL. I think it's
> > in decent shape.
> >
> > Known issues:
> > - I think we're going to want a way to turn the stack switching on and
> > off either at boot time or at runtime. It should be fairly
> > straightforward
> > to make it work.
> >
> > - I think the ORC unwinder isn't so good at dealing with stack overflows.
> > It bails too early (I think), resulting in lots of ? entries. This
> > isn't a regression with this series -- it's just something that could
> > be improved.
>
> Note that with the attached config on an Intel testbox I get the following
> new ORC
> unwinder warning during bootup:
>
> [ 12.200554] calling ghash_pclmulqdqni_mod_init+0x0/0x54 @ 1
> [ 12.209536] WARNING: can't dereference registers at ffffc90004dfff60 for
> ip error_entry+0x7d/0xd0
> [ 12.231388] initcall ghash_pclmulqdqni_mod_init+0x0/0x54 returned 0 after
> 23480 usecs
>
> Thanks,
Also note that the ORC warning goes away if CONFIG_PROVE_LOCKING is disabled.
Thanks,
Ingo
