On Thu, Mar 25, 2021 at 09:56:53PM -0700, Andy Lutomirski wrote:
> Nope. on_sig_stack() is a horrible kludge and won't work here. We
> could have something like __on_sig_stack() or sp_is_on_sig_stack() or
> something, though.
Yeah, see my other reply. Ack to either of those carved out helpers.
> I figure that the people whose programs spontaneously crash should get
> a hint why if they look at dmesg. Maybe the message should say
> "overflowed sigaltstack -- try noavx512"?
I guess, as long as it is ratelimited. I mean, we can remove it later if
it starts gettin' annoying.
> We really ought to have a SIGSIGFAIL signal that's sent, double-fault
> style, when we fail to send a signal.
Yeap, we should be able to tell userspace that we couldn't send a
signal, hohumm.
Thx.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
