(no subject)

[Luis Gerhorst]

Hello Pavel,

I'm from a university and am searching for a project to work on in the
upcoming year. I am looking into allowing userspace to run multiple
system calls interleaved with application-specific logic using a single
context switch.

I noticed that you, Jens Axboe, and Carter Li discussed the possibility
of integrating eBPF into io_uring earlier this year [1, 2, 3]. Is there
any WIP on this topic?

If not I am considering to implement this. Besides the fact that AOT
eBPF is only supported for priviledged processes, are there any issues
you are aware of or reasons why this was not implemented yet?

Best,
Luis

[1] https://lore.kernel.org/io-uring/67b28e66-f2f8-99a1-dfd1-14f753d11f7a@gmail.com/
[2] https://lore.kernel.org/io-uring/8b3f182c-7c4b-da41-7ec8-bb4f22429ed1@kernel.dk/
[3] https://github.com/axboe/liburing/issues/58

Integrating eBPF into io-uring

[linux-kernel]

Forgot subject, sorry.

> On 6. Nov 2020, at 11:44, Luis Gerhorst <linux-kernel@luisgerhorst.de> wrote:
> 
> Hello Pavel,
> 
> I'm from a university and am searching for a project to work on in the
> upcoming year. I am looking into allowing userspace to run multiple
> system calls interleaved with application-specific logic using a single
> context switch.
> 
> I noticed that you, Jens Axboe, and Carter Li discussed the possibility
> of integrating eBPF into io_uring earlier this year [1, 2, 3]. Is there
> any WIP on this topic?
> 
> If not I am considering to implement this. Besides the fact that AOT
> eBPF is only supported for priviledged processes, are there any issues
> you are aware of or reasons why this was not implemented yet?
> 
> Best,
> Luis
> 
> [1] https://lore.kernel.org/io-uring/67b28e66-f2f8-99a1-dfd1-14f753d11f7a@gmail.com/
> [2] https://lore.kernel.org/io-uring/8b3f182c-7c4b-da41-7ec8-bb4f22429ed1@kernel.dk/
> [3] https://github.com/axboe/liburing/issues/58

Re:

[Pavel Begunkov]

On 06/11/2020 10:44, Luis Gerhorst wrote:
> Hello Pavel,
> 
> I'm from a university and am searching for a project to work on in the
> upcoming year. I am looking into allowing userspace to run multiple
> system calls interleaved with application-specific logic using a single
> context switch.
> 
> I noticed that you, Jens Axboe, and Carter Li discussed the possibility
> of integrating eBPF into io_uring earlier this year [1, 2, 3]. Is there
> any WIP on this topic?

To be honest, I've finally returned to it a week ago, just because got
more free time. I was implicitly patching/refactoring some bits keeping
this in mind but rather very lazily.

> If not I am considering to implement this. Besides the fact that AOT
> eBPF is only supported for priviledged processes, are there any issues
> you are aware of or reasons why this was not implemented yet?

All others I was anticipating are gone by now. I'd be really great to
think something out for non-privileged processes, but as you know that
doesn't hold us off.

> [1] https://lore.kernel.org/io-uring/67b28e66-f2f8-99a1-dfd1-14f753d11f7a@gmail.com/
> [2] https://lore.kernel.org/io-uring/8b3f182c-7c4b-da41-7ec8-bb4f22429ed1@kernel.dk/
> [3] https://github.com/axboe/liburing/issues/58
> 

-- 
Pavel Begunkov