From: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
To: Greg KH <greg@kroah.com>
Cc: Wedson Almeida Filho <wedsonaf@google.com>,
Jan Kara <jack@suse.cz>,
James Bottomley <James.Bottomley@hansenpartnership.com>,
Julia Lawall <julia.lawall@inria.fr>,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
Linus Walleij <linus.walleij@linaro.org>,
Roland Dreier <roland@kernel.org>,
ksummit@lists.linux.dev
Subject: Re: [TECH TOPIC] Rust for Linux
Date: Fri, 9 Jul 2021 01:09:54 +0200 [thread overview]
Message-ID: <CANiq72nt7yD2kVjq9mUt+M5eVqfpvaPrZbaGZp1ftWJX3J7FXw@mail.gmail.com> (raw)
In-Reply-To: <YOdHefpRd7isNrZr@kroah.com>
On Thu, Jul 8, 2021 at 8:44 PM Greg KH <greg@kroah.com> wrote:
>
> kref does not contain the lock, but you need to use a lock lots of time
> when dealing with them. See my response to Andy for why.
A lock may be needed in certain scenarios, but that is because
something else is involved -- i.e. to maintain the refcount itself we
don't need a lock.
Let me give an inefficient, unrealistic counter-example: we could use
an atomic with sequential consistency for the refcount.
Cheers,
Miguel
next prev parent reply other threads:[~2021-07-08 23:10 UTC|newest]
Thread overview: 201+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-25 22:09 [TECH TOPIC] Rust for Linux Miguel Ojeda
2021-07-05 23:51 ` Linus Walleij
2021-07-06 4:30 ` Leon Romanovsky
2021-07-06 9:55 ` Linus Walleij
2021-07-06 10:16 ` Geert Uytterhoeven
2021-07-06 17:59 ` Linus Walleij
2021-07-06 18:36 ` Miguel Ojeda
2021-07-06 19:12 ` Linus Walleij
2021-07-06 21:32 ` Miguel Ojeda
2021-07-07 14:10 ` Arnd Bergmann
2021-07-07 15:28 ` Miguel Ojeda
2021-07-07 15:50 ` Andrew Lunn
2021-07-07 16:34 ` Miguel Ojeda
2021-07-07 16:55 ` Arnd Bergmann
2021-07-07 17:54 ` Miguel Ojeda
2021-07-06 10:22 ` Leon Romanovsky
2021-07-06 14:30 ` Miguel Ojeda
2021-07-06 14:32 ` Miguel Ojeda
2021-07-06 15:03 ` Sasha Levin
2021-07-06 15:33 ` Miguel Ojeda
2021-07-06 15:42 ` Laurent Pinchart
2021-07-06 16:09 ` Mike Rapoport
2021-07-06 18:29 ` Miguel Ojeda
2021-07-06 18:38 ` Laurent Pinchart
2021-07-06 19:45 ` Steven Rostedt
2021-07-06 19:59 ` Miguel Ojeda
2021-07-06 18:53 ` Sasha Levin
2021-07-06 21:50 ` Miguel Ojeda
2021-07-07 4:57 ` Leon Romanovsky
2021-07-07 13:39 ` Alexandre Belloni
2021-07-07 13:50 ` Miguel Ojeda
2021-07-06 18:26 ` Linus Walleij
2021-07-06 19:11 ` Miguel Ojeda
2021-07-06 19:13 ` Johannes Berg
2021-07-06 19:43 ` Miguel Ojeda
2021-07-06 10:20 ` James Bottomley
2021-07-06 14:55 ` Miguel Ojeda
2021-07-06 15:01 ` Sasha Levin
2021-07-06 15:36 ` Miguel Ojeda
2021-07-09 10:02 ` Marco Elver
2021-07-09 16:02 ` Miguel Ojeda
2021-07-06 18:09 ` Linus Walleij
2021-07-06 14:24 ` Miguel Ojeda
2021-07-06 14:33 ` Laurent Pinchart
2021-07-06 14:56 ` Leon Romanovsky
2021-07-06 15:29 ` Miguel Ojeda
2021-07-07 4:38 ` Leon Romanovsky
2021-07-06 20:00 ` Roland Dreier
2021-07-06 20:36 ` Linus Walleij
2021-07-06 22:00 ` Laurent Pinchart
2021-07-07 7:27 ` Julia Lawall
2021-07-07 7:45 ` Greg KH
2021-07-07 7:52 ` James Bottomley
2021-07-07 13:49 ` Miguel Ojeda
2021-07-07 14:08 ` James Bottomley
2021-07-07 15:15 ` Miguel Ojeda
2021-07-07 15:44 ` Greg KH
2021-07-07 17:01 ` Wedson Almeida Filho
2021-07-07 17:20 ` Greg KH
2021-07-07 19:19 ` Wedson Almeida Filho
2021-07-07 20:38 ` Jan Kara
2021-07-07 23:09 ` Wedson Almeida Filho
2021-07-08 6:11 ` Greg KH
2021-07-08 13:36 ` Wedson Almeida Filho
2021-07-08 18:51 ` Greg KH
2021-07-08 19:31 ` Andy Lutomirski
2021-07-08 19:35 ` Geert Uytterhoeven
2021-07-08 21:56 ` Andy Lutomirski
2021-07-08 19:49 ` Linus Walleij
2021-07-08 20:34 ` Miguel Ojeda
2021-07-08 22:13 ` Linus Walleij
2021-07-09 7:24 ` Geert Uytterhoeven
2021-07-19 12:24 ` Wedson Almeida Filho
2021-07-19 13:15 ` Wedson Almeida Filho
2021-07-19 14:02 ` Arnd Bergmann
2021-07-19 14:13 ` Linus Walleij
2021-07-19 21:32 ` Arnd Bergmann
2021-07-19 21:33 ` Arnd Bergmann
2021-07-20 1:46 ` Miguel Ojeda
2021-07-20 6:43 ` Johannes Berg
2021-07-19 14:43 ` Geert Uytterhoeven
2021-07-19 18:24 ` Miguel Ojeda
2021-07-19 18:47 ` Steven Rostedt
2021-07-19 14:54 ` Miguel Ojeda
2021-07-19 17:32 ` Wedson Almeida Filho
2021-07-19 21:31 ` Arnd Bergmann
2021-07-19 17:37 ` Miguel Ojeda
2021-07-19 16:02 ` Vegard Nossum
2021-07-19 17:45 ` Miguel Ojeda
2021-07-19 17:54 ` Miguel Ojeda
2021-07-19 18:06 ` Wedson Almeida Filho
2021-07-19 19:37 ` Laurent Pinchart
2021-07-19 21:09 ` Wedson Almeida Filho
2021-07-20 23:54 ` Laurent Pinchart
2021-07-21 1:33 ` Andy Lutomirski
2021-07-21 1:42 ` Laurent Pinchart
2021-07-21 13:54 ` Linus Walleij
2021-07-21 14:13 ` Wedson Almeida Filho
2021-07-21 14:19 ` Linus Walleij
2021-07-22 11:33 ` Wedson Almeida Filho
2021-07-23 0:45 ` Linus Walleij
2021-07-21 4:39 ` Wedson Almeida Filho
2021-07-23 1:04 ` Laurent Pinchart
2021-07-21 4:23 ` Wedson Almeida Filho
2021-07-23 1:13 ` Laurent Pinchart
2021-07-19 22:57 ` Alexandre Belloni
2021-07-20 7:15 ` Miguel Ojeda
2021-07-20 9:39 ` Alexandre Belloni
2021-07-20 12:10 ` Miguel Ojeda
2021-07-19 13:53 ` Linus Walleij
2021-07-19 14:42 ` Wedson Almeida Filho
2021-07-19 22:16 ` Linus Walleij
2021-07-20 1:20 ` Wedson Almeida Filho
2021-07-20 13:21 ` Andrew Lunn
2021-07-20 13:38 ` Miguel Ojeda
2021-07-20 14:04 ` Andrew Lunn
2021-07-20 13:55 ` Greg KH
2021-07-20 1:21 ` Miguel Ojeda
2021-07-20 16:00 ` Mark Brown
2021-07-20 22:42 ` Linus Walleij
2021-07-19 14:43 ` Miguel Ojeda
2021-07-19 15:15 ` Andrew Lunn
2021-07-19 15:43 ` Miguel Ojeda
2021-07-09 7:03 ` Viresh Kumar
2021-07-09 17:06 ` Mark Brown
2021-07-09 17:43 ` Miguel Ojeda
2021-07-10 9:53 ` Jonathan Cameron
2021-07-10 20:09 ` Kees Cook
2021-07-08 13:55 ` Miguel Ojeda
2021-07-08 14:58 ` Greg KH
2021-07-08 15:02 ` Mark Brown
2021-07-08 16:38 ` Andy Lutomirski
2021-07-08 18:01 ` Greg KH
2021-07-08 18:00 ` Miguel Ojeda
2021-07-08 18:44 ` Greg KH
2021-07-08 23:09 ` Miguel Ojeda [this message]
2021-07-08 7:20 ` Geert Uytterhoeven
2021-07-08 13:41 ` Wedson Almeida Filho
2021-07-08 13:43 ` Geert Uytterhoeven
2021-07-08 13:54 ` Wedson Almeida Filho
2021-07-08 14:16 ` Geert Uytterhoeven
2021-07-08 14:24 ` Wedson Almeida Filho
2021-07-09 7:04 ` Jerome Glisse
2021-07-08 14:04 ` Miguel Ojeda
2021-07-08 14:18 ` Geert Uytterhoeven
2021-07-08 14:28 ` Miguel Ojeda
2021-07-08 14:33 ` Geert Uytterhoeven
2021-07-08 14:35 ` Miguel Ojeda
2021-07-09 11:55 ` Geert Uytterhoeven
2021-07-08 16:07 ` Andy Lutomirski
2021-07-07 20:58 ` Miguel Ojeda
2021-07-07 21:47 ` Laurent Pinchart
2021-07-07 22:44 ` Miguel Ojeda
2021-07-07 17:01 ` Miguel Ojeda
2021-07-07 10:50 ` Mark Brown
2021-07-07 10:56 ` Julia Lawall
2021-07-07 11:27 ` James Bottomley
2021-07-07 11:34 ` James Bottomley
2021-07-07 12:20 ` Greg KH
2021-07-07 12:38 ` James Bottomley
2021-07-07 12:45 ` Greg KH
2021-07-07 17:17 ` Laurent Pinchart
2021-07-08 6:49 ` cdev/devm_* issues (was Re: [TECH TOPIC] Rust for Linux) Greg KH
2021-07-08 8:23 ` Laurent Pinchart
2021-07-08 23:06 ` Linus Walleij
2021-07-09 0:02 ` Dan Williams
2021-07-09 16:53 ` Wedson Almeida Filho
2021-07-13 8:59 ` Linus Walleij
[not found] ` <CAHp75VfW7PxAyU=eYPNWFU_oUY=aStz-4W5gX87KSo402YhMXQ@mail.gmail.com>
2021-07-21 13:46 ` Linus Walleij
2021-07-21 15:49 ` Andy Shevchenko
2021-07-10 7:09 ` Dan Carpenter
2021-07-12 13:42 ` Jason Gunthorpe
2021-07-15 9:54 ` Daniel Vetter
2021-07-21 9:08 ` Dan Carpenter
2021-07-22 9:56 ` Daniel Vetter
2021-07-22 10:09 ` Dan Carpenter
2021-07-08 9:08 ` [TECH TOPIC] Rust for Linux Mauro Carvalho Chehab
2021-07-10 16:42 ` Laurent Pinchart
2021-07-10 17:18 ` Andy Lutomirski
2021-07-07 15:17 ` Mark Brown
2021-07-06 21:45 ` Bart Van Assche
2021-07-06 23:08 ` Stephen Hemminger
2021-07-07 2:41 ` Bart Van Assche
2021-07-07 18:57 ` Linus Torvalds
2021-07-07 20:32 ` Bart Van Assche
2021-07-07 20:39 ` Linus Torvalds
2021-07-07 21:40 ` Laurent Pinchart
2021-07-08 7:22 ` Geert Uytterhoeven
2021-07-07 21:02 ` Laurent Pinchart
2021-07-07 22:11 ` Miguel Ojeda
2021-07-07 22:43 ` Laurent Pinchart
2021-07-07 23:21 ` Miguel Ojeda
2021-07-07 23:40 ` Laurent Pinchart
2021-07-08 0:27 ` Miguel Ojeda
2021-07-08 0:56 ` Laurent Pinchart
2021-07-08 6:26 ` Alexey Dobriyan
2021-07-06 19:05 ` Bart Van Assche
2021-07-06 19:27 ` Miguel Ojeda
2021-07-07 15:48 ` Steven Rostedt
2021-07-07 16:44 ` Miguel Ojeda
2023-08-07 10:03 Miguel Ojeda
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