On Tue, Jan 29, 2019 at 5:19 PM Jens Axboe <axboe@xxxxxxxxx> wrote:
> On 1/29/19 9:18 AM, Arnd Bergmann wrote:
> > On Tue, Jan 29, 2019 at 4:20 PM Jens Axboe <axboe@xxxxxxxxx> wrote:
> >> That's good info. I am currently using set_user_sigmask() for it.
> >> I'd really like to avoid having to pass in a sigset_t size for the
> >> system call, however.
> >
> > I really wouldn't do it, given that all other signal handling interfaces
> > are prepared for longer signal masks. You /could/ probably extend
> > it later with a flags bit to signify a longer mask instead of using
> > the entire register to hold the bit length, it just seems really
> > inconsistent with all other system calls.
>
> Damnit! OK, I'll keep what I currently have then.
As long as you stay within the 6-argument syscall contraints,
the cost of passing the length is basically free, right?
Is there anything else you are worried about?
Arnd
