From: Pavel Begunkov <[email protected]>
To: Jens Axboe <[email protected]>, Stefan Metzmacher <[email protected]>
Cc: io-uring <[email protected]>,
Linux API Mailing List <[email protected]>
Subject: Re: IORING_REGISTER_CREDS[_UPDATE]() and credfd_create()?
Date: Wed, 29 Jan 2020 13:17:02 +0300 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
[-- Attachment #1.1: Type: text/plain, Size: 1416 bytes --]
On 29/01/2020 03:54, Jens Axboe wrote:
> On 1/28/20 5:24 PM, Jens Axboe wrote:
>> On 1/28/20 5:21 PM, Pavel Begunkov wrote:
>>> On 29/01/2020 03:20, Jens Axboe wrote:
>>>> On 1/28/20 5:10 PM, Pavel Begunkov wrote:
>>>>>>>> Checked out ("don't use static creds/mm assignments")
>>>>>>>>
>>>>>>>> 1. do we miscount cred refs? We grab one in get_current_cred() for each async
>>>>>>>> request, but if (worker->creds != work->creds) it will never be put.
>>>>>>>
>>>>>>> Yeah I think you're right, that needs a bit of fixing up.
>>>>>>
>>>>>
>>>>> Hmm, it seems it leaks it unconditionally, as it grabs in a ref in
>>>>> override_creds().
>>>>>
>>>>
>>>> We grab one there, and an extra one. Then we drop one of them inline,
>>>> and the other in __io_req_aux_free().
>>>>
>>> Yeah, with the last patch it should make it even
>>
>> OK good we agree on that. I should probably pull back that bit to the
>> original patch to avoid having a hole in there...
>
> Done
>
("io_uring/io-wq: don't use static creds/mm assignments") and ("io_uring:
support using a registered personality for commands") looks good now.
Reviewed-by: Pavel Begunkov <[email protected]>
BTW, why do use decided to use idr, but not linear buffer scheme as for the rest
registered ones? We can rework it later for performance with linear search in
the buffer upon registration.
--
Pavel Begunkov
[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 833 bytes --]
next prev parent reply other threads:[~2020-01-29 10:17 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-28 10:18 IORING_REGISTER_CREDS[_UPDATE]() and credfd_create()? Stefan Metzmacher
2020-01-28 16:10 ` Jens Axboe
2020-01-28 16:17 ` Stefan Metzmacher
2020-01-28 16:19 ` Jens Axboe
2020-01-28 17:19 ` Jens Axboe
2020-01-28 18:04 ` Jens Axboe
2020-01-28 19:42 ` Jens Axboe
2020-01-28 20:16 ` Pavel Begunkov
2020-01-28 20:19 ` Jens Axboe
2020-01-28 20:50 ` Pavel Begunkov
2020-01-28 20:56 ` Jens Axboe
2020-01-28 21:25 ` Christian Brauner
2020-01-28 22:38 ` Pavel Begunkov
2020-01-28 23:36 ` Pavel Begunkov
2020-01-28 23:40 ` Jens Axboe
2020-01-28 23:51 ` Jens Axboe
2020-01-29 0:10 ` Pavel Begunkov
2020-01-29 0:15 ` Jens Axboe
2020-01-29 0:18 ` Jens Axboe
2020-01-29 0:20 ` Jens Axboe
2020-01-29 0:21 ` Pavel Begunkov
2020-01-29 0:24 ` Jens Axboe
2020-01-29 0:54 ` Jens Axboe
2020-01-29 10:17 ` Pavel Begunkov [this message]
2020-01-29 13:11 ` Stefan Metzmacher
2020-01-29 13:41 ` Pavel Begunkov
2020-01-29 13:56 ` Stefan Metzmacher
2020-01-29 14:23 ` Pavel Begunkov
2020-01-29 14:27 ` Stefan Metzmacher
2020-01-29 14:34 ` Pavel Begunkov
2020-01-29 17:34 ` Jens Axboe
2020-01-29 17:42 ` Jens Axboe
2020-01-29 20:09 ` Stefan Metzmacher
2020-01-29 20:48 ` Jens Axboe
2020-01-29 17:46 ` Pavel Begunkov
2020-01-29 14:59 ` Jann Horn
2020-01-29 17:34 ` Jens Axboe
2020-01-30 1:08 ` Jens Axboe
2020-01-30 2:20 ` Jens Axboe
2020-01-30 3:18 ` Jens Axboe
2020-01-30 6:53 ` Stefan Metzmacher
2020-01-30 10:11 ` Jann Horn
2020-01-30 10:26 ` Christian Brauner
2020-01-30 14:11 ` Jens Axboe
2020-01-30 14:47 ` Stefan Metzmacher
2020-01-30 15:34 ` Jens Axboe
2020-01-30 15:13 ` Christian Brauner
2020-01-30 15:29 ` 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] \
/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