Re: frequent lockups in 3.18rc4

[Linus Torvalds]

On Mon, Nov 17, 2014 at 9:03 AM, Dave Jones <davej@xxxxxxxxxx> wrote:
>
> It could a completely different cause for lockup, but seeing this now
> has me wondering if perhaps it's something unrelated to the kernel.
> I have recollection of running late .17rc's for days without incident,
> and I'm pretty sure .17 was ok too.  But a few weeks ago I did upgrade
> that test box to the Fedora 21 beta.  Which means I have a new gcc.
> I'm not sure I really trust 4.9.1 yet, so maybe I'll see if I can
> get 4.8 back on there and see if that's any better.

I'm not sure if I should be relieved or horrified.

Horrified, I think.

It really would be a wonderful thing to have some kind of "compiler
bisection" with mixed object files to see exactly which file it
miscompiles (and by "miscompiles" it might just be a kernel bug where
we are missing a barrier or something, and older gcc's just happened
to not show it - so it could still easily be a kernel problem).

                  Linus
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/