Re: [PATCH 05/18] Add io_uring IO interface

On Tue, Jan 29, 2019 at 5:19 PM Jens Axboe [off-list ref] wrote:

On 1/29/19 9:18 AM, Arnd Bergmann wrote:

quoted

On Tue, Jan 29, 2019 at 4:20 PM Jens Axboe [off-list ref] wrote:

quoted

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

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