public inbox for [email protected]
 help / color / mirror / Atom feed
From: Stefan Metzmacher <[email protected]>
To: Pavel Begunkov <[email protected]>,
	io-uring <[email protected]>, Jens Axboe <[email protected]>
Cc: Jakub Kicinski <[email protected]>, netdev <[email protected]>,
	Dylan Yudaken <[email protected]>
Subject: Re: IORING_SEND_NOTIF_USER_DATA (was Re: IORING_CQE_F_COPIED)
Date: Fri, 21 Oct 2022 10:32:16 +0200	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

Hi Pavel,

>>>> Experimenting with this stuff lets me wish to have a way to
>>>> have a different 'user_data' field for the notif cqe,
>>>> maybe based on a IORING_RECVSEND_ flag, it may make my life
>>>> easier and would avoid some complexity in userspace...
>>>> As I need to handle retry on short writes even with MSG_WAITALL
>>>> as EINTR and other errors could cause them.
>>>>
>>>> What do you think?
>>
>> Any comment on this?
>>
>> IORING_SEND_NOTIF_USER_DATA could let us use
>> notif->cqe.user_data = sqe->addr3;
> 
> I'd rather not use the last available u64, tbh, that was the
> reason for not adding a second user_data in the first place.

As far as I can see io_send_zc_prep has this:

         if (unlikely(READ_ONCE(sqe->__pad2[0]) || READ_ONCE(sqe->addr3)))
                 return -EINVAL;

both are u64...

metze

  reply	other threads:[~2022-10-21  8:33 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-10-14 11:06 IORING_CQE_F_COPIED Stefan Metzmacher
2022-10-17 16:46 ` IORING_CQE_F_COPIED Pavel Begunkov
2022-10-18  8:43   ` IORING_CQE_F_COPIED Stefan Metzmacher
2022-10-19 15:06     ` IORING_CQE_F_COPIED Pavel Begunkov
2022-10-19 16:12       ` IORING_CQE_F_COPIED Stefan Metzmacher
2022-10-20  2:24         ` IORING_CQE_F_COPIED Pavel Begunkov
2022-10-20 10:04           ` IORING_SEND_NOTIF_REPORT_USAGE (was Re: IORING_CQE_F_COPIED) Stefan Metzmacher
2022-10-20 13:46             ` Pavel Begunkov
2022-10-20 14:51               ` Stefan Metzmacher
2022-10-20 15:31                 ` Pavel Begunkov
2022-10-21  9:36                   ` Stefan Metzmacher
2022-10-21 11:09                     ` Pavel Begunkov
2022-10-21 14:03                       ` Stefan Metzmacher
2022-10-27  8:47                         ` Stefan Metzmacher
2022-10-27 10:51                         ` Pavel Begunkov
2022-10-20 10:10           ` IORING_SEND_NOTIF_USER_DATA " Stefan Metzmacher
2022-10-20 15:37             ` Pavel Begunkov
2022-10-21  8:32               ` Stefan Metzmacher [this message]
2022-10-21  9:27                 ` Pavel Begunkov
2022-10-21  9:45                   ` Stefan Metzmacher
2022-10-21 11:20                     ` Pavel Begunkov
2022-10-21 12:10                       ` Stefan Metzmacher
2022-10-21 10:15                   ` Stefan Metzmacher
2022-10-21 11:26                     ` Pavel Begunkov
2022-10-21 12:38                       ` Stefan Metzmacher

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] \
    [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