All of lore.kernel.org
 help / color / mirror / Atom feed
From: Daniel Black <daniel@mariadb.org>
To: Salvatore Bonaccorso <carnil@debian.org>
Cc: Pavel Begunkov <asml.silence@gmail.com>,
	linux-block@vger.kernel.org, io-uring@vger.kernel.org
Subject: Re: uring regression - lost write request
Date: Mon, 1 Nov 2021 18:28:19 +1100	[thread overview]
Message-ID: <CABVffEO4mBTuiLzvny1G1ocO7PvTpKYTCS5TO2fbaevu2TqdGQ@mail.gmail.com> (raw)
In-Reply-To: <YXz0roPH+stjFygk@eldamar.lan>

[-- Attachment #1: Type: text/plain, Size: 1393 bytes --]

On Sat, Oct 30, 2021 at 6:30 PM Salvatore Bonaccorso <carnil@debian.org> wrote:

> > > I'm retesting https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.14.14/
> > > in earnest. I did get some assertions, but they may have been
> > > unrelated. The testing continues...
> >
> > Thanks for the work on pinpointing it. I'll wait for your conclusion
> > then, it'll give us an idea what we should look for.
>
> Were you able to pinpoint the issue?

Retesting on the ubuntu mainline 5.14.14 and 5.14.15 was unable to
reproduce the issue in a VM.

Using Fedora (34) 5.14.14 and 5.14.15 kernel I am reasonably able to
reproduce this, and it is now reported as
https://bugzilla.redhat.com/show_bug.cgi?id=2018882.

I've so far been unable to reproduce this issue on 5.15.0-rc7 inside a
(Ubuntu-21.10) VM.

Marko did using a other heavy flushing sysbench script (modified
version attached - slightly lower specs, and can be used on distro
install) was able to see the fault (qps goes to 0) using Debian sid
userspace and 5.15-rc6/5.15-rc7 Ubuntu mainline kernels.
https://jira.mariadb.org/browse/MDEV-26674?focusedCommentId=203645&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-203645

Note if using a mariadb-10.6.5 (not quite released), there's a change
of defaults to avoid this bug, mtr options
--mysqld=--innodb_use_native_aio=1 --nowarnings  will test this
however.

[-- Attachment #2: Mariarebench-MDEV-23855.sh --]
[-- Type: application/x-shellscript, Size: 3163 bytes --]

  reply	other threads:[~2021-11-01  7:28 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-22  3:12 uring regression - lost write request Daniel Black
2021-10-22  9:10 ` Pavel Begunkov
2021-10-25  9:57   ` Pavel Begunkov
2021-10-25 11:09     ` Daniel Black
2021-10-25 11:25       ` Pavel Begunkov
2021-10-30  7:30         ` Salvatore Bonaccorso
2021-11-01  7:28           ` Daniel Black [this message]
2021-11-09 22:58             ` Daniel Black
2021-11-09 23:24               ` Jens Axboe
2021-11-10 18:01                 ` Jens Axboe
2021-11-11  6:52                   ` Daniel Black
2021-11-11 14:30                     ` Jens Axboe
2021-11-11 14:58                       ` Jens Axboe
2021-11-11 15:29                         ` Jens Axboe
2021-11-11 16:19                           ` Jens Axboe
2021-11-11 16:55                             ` Jens Axboe
2021-11-11 17:28                               ` Jens Axboe
2021-11-11 23:44                                 ` Jens Axboe
2021-11-12  6:25                                   ` Daniel Black
2021-11-12 19:19                                     ` Salvatore Bonaccorso
2021-11-14 20:33                                   ` Daniel Black
2021-11-14 20:55                                     ` Jens Axboe
2021-11-14 21:02                                       ` Salvatore Bonaccorso
2021-11-14 21:03                                         ` Jens Axboe
2021-11-24  3:27                                       ` Daniel Black
2021-11-24 15:28                                         ` Jens Axboe
2021-11-24 16:10                                           ` Jens Axboe
2021-11-24 16:18                                             ` Greg Kroah-Hartman
2021-11-24 16:22                                               ` Jens Axboe
2021-11-24 22:52                                                 ` Stefan Metzmacher
2021-11-25  0:58                                                   ` Jens Axboe
2021-11-25 16:35                                                     ` Stefan Metzmacher
2021-11-25 17:11                                                       ` Jens Axboe
2022-02-09 23:01                                                       ` Stefan Metzmacher
2022-02-10  0:10                                                         ` Daniel Black
2021-11-24 22:57                                                 ` Daniel Black

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 \
    --in-reply-to=CABVffEO4mBTuiLzvny1G1ocO7PvTpKYTCS5TO2fbaevu2TqdGQ@mail.gmail.com \
    --to=daniel@mariadb.org \
    --cc=asml.silence@gmail.com \
    --cc=carnil@debian.org \
    --cc=io-uring@vger.kernel.org \
    --cc=linux-block@vger.kernel.org \
    /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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.