From: Pavel Begunkov <[email protected]>
To: Jens Axboe <[email protected]>, Colin Walters <[email protected]>,
Stefan Metzmacher <[email protected]>,
[email protected]
Cc: [email protected]
Subject: Re: [PATCHSET v2 0/6] io_uring: add support for open/close
Date: Sat, 18 Jan 2020 01:27:52 +0300 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
[-- Attachment #1.1: Type: text/plain, Size: 1952 bytes --]
On 17/01/2020 18:21, Jens Axboe wrote:
> On 1/17/20 2:32 AM, Pavel Begunkov wrote:
>> On 1/17/2020 3:44 AM, Colin Walters wrote:
>>> On Thu, Jan 16, 2020, at 5:50 PM, Stefan Metzmacher wrote:
>>>> The client can compound a chain with open, getinfo, read, close
>>>> getinfo, read and close get an file handle of -1 and implicitly
>>>> get the fd generated/used in the previous request.
>>>
>>> Sounds similar to https://capnproto.org/rpc.html too.
>>>
>> Looks like just grouping a pack of operations for RPC.
>> With io_uring we could implement more interesting stuff. I've been
>> thinking about eBPF in io_uring for a while as well, and apparently it
>> could be _really_ powerful, and would allow almost zero-context-switches
>> for some usecases.
>>
>> 1. full flow control with eBPF
>> - dropping requests (links)
>> - emitting reqs/links (e.g. after completions of another req)
>> - chaining/redirecting
>> of course, all of that with fast intermediate computations in between
>>
>> 2. do long eBPF programs by introducing a new opcode (punted to async).
>> (though, there would be problems with that)
>>
>> Could even allow to dynamically register new opcodes within the kernel
>> and extend it to eBPF, if there will be demand for such things.
>
> We're also looking into exactly that at Facebook, nothing concrete yet
> though. But it's clear we need it to take full advantage of links at
> least, and it's also clear that it would unlock a lot of really cool
> functionality once we do.
>
> Pavel, I'd strongly urge you to submit a talk to LSF/MM/BPF about this.
> It's the perfect venue to have some concrete planning around this topic
> and get things rolling.
Sounds interesting, I'll try this, but didn't you intend to do it yourself?
And thanks for the tip!
>
> https://lore.kernel.org/bpf/20191122172502.vffyfxlqejthjib6@macbook-pro-91.dhcp.thefacebook.com/
>
--
Pavel Begunkov
[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 833 bytes --]
next prev parent reply other threads:[~2020-01-17 22:28 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-07 17:00 [PATCHSET v2 0/6] io_uring: add support for open/close Jens Axboe
2020-01-07 17:00 ` [PATCH 1/6] fs: add namei support for doing a non-blocking path lookup Jens Axboe
2020-01-25 13:15 ` Jeff Layton
2020-01-07 17:00 ` [PATCH 2/6] fs: make build_open_flags() available internally Jens Axboe
2020-01-07 17:00 ` [PATCH 3/6] io_uring: add support for IORING_OP_OPENAT Jens Axboe
2020-01-08 13:05 ` Stefan Metzmacher
2020-01-08 16:20 ` Jens Axboe
2020-01-08 16:32 ` Stefan Metzmacher
2020-01-08 16:40 ` Jens Axboe
2020-01-08 17:04 ` Stefan Metzmacher
2020-01-08 22:53 ` Jens Axboe
2020-01-08 23:03 ` Stefan Metzmacher
2020-01-08 23:05 ` Jens Axboe
2020-01-08 23:11 ` Stefan Metzmacher
2020-01-08 23:22 ` Jens Axboe
2020-01-09 10:40 ` Stefan Metzmacher
2020-01-09 21:31 ` Jens Axboe
2020-01-16 22:42 ` Stefan Metzmacher
2020-01-17 0:16 ` Jens Axboe
2020-01-07 17:00 ` [PATCH 4/6] fs: move filp_close() outside of __close_fd_get_file() Jens Axboe
2020-01-07 17:00 ` [PATCH 5/6] io-wq: add support for uncancellable work Jens Axboe
2020-01-07 17:00 ` [PATCH 6/6] io_uring: add support for IORING_OP_CLOSE Jens Axboe
2020-01-08 21:17 ` [PATCHSET v2 0/6] io_uring: add support for open/close Stefan Metzmacher
2020-01-08 22:57 ` Jens Axboe
2020-01-08 23:05 ` Stefan Metzmacher
2020-01-09 1:02 ` Jens Axboe
2020-01-09 2:03 ` Jens Axboe
2020-01-16 22:50 ` Stefan Metzmacher
2020-01-17 0:18 ` Jens Axboe
2020-01-20 12:15 ` Stefan Metzmacher
2020-01-20 13:04 ` Pavel Begunkov
2020-01-17 0:44 ` Colin Walters
2020-01-17 0:51 ` Jens Axboe
2020-01-17 9:32 ` Pavel Begunkov
2020-01-17 15:21 ` Jens Axboe
2020-01-17 22:27 ` Pavel Begunkov [this message]
2020-01-17 22:36 ` Jens Axboe
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
[email protected] \
[email protected] \
[email protected] \
[email protected] \
[email protected] \
[email protected] \
[email protected] \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox