Is unsafe hell truly good for linux kernel in the future?

By: anon (anon.delete@this.mailinator.com), July 10, 2021 3:14 am
Room: Moderated Discussions
cqwrteur (euloanty.delete@this.live.com) on July 9, 2021 9:56 pm wrote:
> I just read the upcoming Rust code for Linux Kernel from Github. Maybe I am stupid.
> What I see is just unsafe everywhere. All Rust functions are unsafe.

Does the word unsafe trigger you? Rust under the keyword unsafe is still dramatically more safe than C. It does not turn off any of the safety features of rust, it just adds additional operations that cannot be checked by the compiler so need to be checked by humans.

In this case, the unsafe operation is using ptr.write() (which is identical to c "*ptr = ...") to initialize a low-level primitive. Completely unchecked pointer access is obviously unsafe, because you could be doing anything. However, it is easy to see from the code that this particular use is indeed safe.

There will be a lot of use of unsafe in the scaffolding that will be written to support rust in the kernel, because all low-level primitives fundamentally need it. The idea is that the drivers written on top of that scaffolding would not be using a lot of unsafe.
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Is unsafe hell truly good for linux kernel in the future?cqwrteur2021/07/09 08:56 PM
  Is unsafe hell truly good for linux kernel in the future?Brendan2021/07/09 11:59 PM
    Is unsafe hell truly good for linux kernel in the future?cqwrteur2021/07/10 12:37 PM
  Is unsafe hell truly good for linux kernel in the future?anon2021/07/10 03:14 AM
    Is unsafe hell truly good for linux kernel in the future?cqwrteur2021/07/10 12:40 PM
      Is unsafe hell truly good for linux kernel in the future?Gabriele Svelto2021/07/10 02:59 PM
        Is unsafe hell truly good for linux kernel in the future?cqwrteur2021/07/10 03:42 PM
      Is unsafe hell truly good for linux kernel in the future?anon2021/07/11 05:11 AM
        Is unsafe hell truly good for linux kernel in the future?cqwrteur2021/07/12 11:40 AM
  Is unsafe hell truly good for linux kernel in the future?Foo_2021/07/10 05:56 AM
    Is unsafe hell truly good for linux kernel in the future?cqwrteur2021/07/10 08:59 AM
      Most RWT posters don’t decide what goes into the Linux kernelMark Roulo2021/07/10 11:55 AM
      Is unsafe hell truly good for linux kernel in the future?Foo_2021/07/22 10:10 AM
    Is unsafe hell truly good for linux kernel in the future?cqwrteur2021/07/10 09:22 AM
      Is unsafe hell truly good for linux kernel in the future?cqwrteur2021/07/10 09:24 AM
        Déja VuDismissive2021/07/10 09:41 AM
          Déja Vucqwrteur2021/07/10 09:47 AM
            Déja VuDismissive2021/07/10 09:51 AM
            Déja VuMichael S2021/07/10 12:11 PM
  Is unsafe hell truly good for linux kernel in the future?Gabriele Svelto2021/07/10 11:51 AM
    Is unsafe hell truly good for linux kernel in the future?cqwrteur2021/07/10 12:32 PM
      Is unsafe hell truly good for linux kernel in the future?Michael S2021/07/10 01:04 PM
        Is unsafe hell truly good for linux kernel in the future?cqwrteur2021/07/10 01:25 PM
      Is unsafe hell truly good for linux kernel in the future?Gabriele Svelto2021/07/10 02:56 PM
        Is unsafe hell truly good for linux kernel in the future?cqwrteur2021/07/10 03:41 PM
          Is unsafe hell truly good for linux kernel in the future?Rayla2021/07/10 04:33 PM
            Is unsafe hell truly good for linux kernel in the future?cqwrteur2021/07/10 05:27 PM
              Interesting response... (NT)Rayla2021/07/10 08:02 PM
                perhaps just another lousy AI bot? (NT)anonymou52021/07/10 08:33 PM
                  perhaps just another lousy AI bot?dmcq2021/07/10 10:26 PM
                    perhaps just another lousy AI bot?cqwrteur2021/07/10 10:56 PM
                      perhaps just another lousy AI bot?dmcq2021/07/11 02:29 AM
                      perhaps just another lousy AI bot?anon2021/07/11 05:16 AM
                        perhaps just another lousy AI bot?cqwrteur2021/07/12 02:56 PM
                    perhaps just another lousy AI bot?Rayla2021/07/11 05:13 AM
                      perhaps just another lousy AI bot?cqwrteur2021/07/11 10:59 AM
                        When did I call you a bot, Kebabbert? (NT)Rayla2021/07/11 07:51 PM
              Alternatives?Brendan2021/07/11 12:54 AM
                Alternatives?Michael S2021/07/11 05:01 AM
                  Alternatives?Brendan2021/07/11 05:51 AM
                    Alternatives?cqwrteur2021/07/11 10:58 AM
                      Alternatives?Gabriele Svelto2021/07/12 12:31 AM
                        Alternatives?Michael S2021/07/12 02:58 AM
                          Alternatives?anon22021/07/12 08:08 AM
                            Alternatives?Michael S2021/07/12 08:22 AM
                              cqwrteur: Keep it politeDavid Kanter2021/07/13 07:59 AM
                          Alternatives?dmcq2021/07/12 08:37 AM
                            Alternatives?cqwrteur2021/07/12 03:04 PM
                              Alternatives?dmcq2021/07/12 03:26 PM
                                Alternatives?cqwrteur2021/07/13 12:47 AM
                                  Alternatives?dmcq2021/07/13 05:54 AM
                          Alternatives?Jörn Engel2021/07/13 03:53 PM
                            Alternatives?FrankHB2021/07/17 06:56 AM
                          Differences between Rust and C/GoGabriele Svelto2021/07/14 04:57 AM
                            Differences between Rust and C/GoFrankHB2021/07/17 08:47 AM
                        Alternatives?FrankHB2021/07/12 09:08 AM
                          Alternatives?Gabriele Svelto2021/07/14 01:28 PM
                            Inappropriate messages removed: cqwrteurDavid Kanter2021/07/15 09:59 AM
                            Alternatives?FrankHB2021/07/16 05:43 AM
                              Alternatives?Anon2021/07/16 11:01 AM
                                Alternatives?Gabriele Svelto2021/07/16 12:44 PM
                                Type abstraction and kernel programmingFrankHB2021/07/17 12:44 AM
                                  Type abstraction and kernel programmingdmcq2021/07/18 03:00 AM
                                    Type abstraction and kernel programmingdmcq2021/07/18 03:36 AM
                                  Type abstraction and kernel programmingEtienne Lorrain2021/07/19 12:03 AM
                                    Type abstraction and kernel programmingdmcq2021/07/19 01:01 AM
                                      Type abstraction and kernel programmingAnon2021/07/19 01:05 AM
                                        Type abstraction and kernel programmingdmcq2021/07/19 02:23 AM
                                      Type abstraction and kernel programmingBrendan2021/07/19 06:05 AM
                                Alternatives?gallier22021/07/20 03:57 AM
                                  Alternatives?Anon2021/07/20 05:24 AM
                                    Alternatives?Michael S2021/07/20 09:14 AM
                                      Alternatives?Anon2021/07/20 09:53 AM
                                        Alternatives?gallier22021/07/21 10:44 PM
                                      Alternatives?Adrian2021/07/20 11:00 AM
                                        Alternatives?Brett2021/07/20 10:13 PM
                                          Alternatives?Michael S2021/07/21 01:12 AM
                                            Alternatives?dmcq2021/07/22 11:58 AM
                                          Alternatives?Anon2021/07/21 07:58 AM
                      Alternatives?Brendan2021/07/12 01:34 AM
                        Alternatives?FrankHB2021/07/12 09:57 AM
                          Alternatives?cqwrteur2021/07/12 11:55 AM
                            Alternatives?FrankHB2021/07/12 08:44 PM
                          Alternatives?Brendan2021/07/12 07:52 PM
                            Alternatives?cqwrteur2021/07/12 10:05 PM
                              Alternatives?Anon2021/07/12 10:42 PM
                                Alternatives?cqwrteur2021/07/12 11:42 PM
                                Alternatives?cqwrteur2021/07/12 11:44 PM
                                  Alternatives?Anon2021/07/13 07:32 PM
                                    Alternatives?cqwrteur2021/07/13 08:36 PM
                                    Alternatives?cqwrteur2021/07/13 08:39 PM
                                      Alternatives?Anon2021/07/13 09:02 PM
                                        Alternatives?cqwrteur2021/07/13 09:18 PM
                                    Alternatives?cqwrteur2021/07/13 08:49 PM
                                      Alternatives?Anon2021/07/13 09:07 PM
                                        Alternatives?cqwrteur2021/07/13 09:16 PM
                                          Alternatives?Anon2021/07/13 10:31 PM
                                            Alternatives?cqwrteur2021/07/13 11:30 PM
                                              Alternatives?Anon2021/07/14 12:55 AM
                                                Alternatives?cqwrteur2021/07/14 01:22 AM
                                                  Alternatives?Anon2021/07/14 02:05 AM
                                                    Alternatives?cqwrteur2021/07/14 02:11 AM
                                                      Alternatives?Anon2021/07/14 03:16 AM
                                                        Alternatives?cqwrteur2021/07/14 06:06 AM
                                                          Alternatives?Anon2021/07/14 07:20 AM
                                                            Alternatives?cqwrteur2021/07/14 07:51 AM
                                                              Alternatives?Anon2021/07/14 11:33 AM
                                                              Alternatives?Gabriele Svelto2021/07/14 12:19 PM
                                                                Alternatives?FrankHB2021/07/16 06:07 AM
                                            Alternatives?cqwrteur2021/07/13 11:33 PM
                                              Alternatives?Anon2021/07/14 12:57 AM
                                                Alternatives?cqwrteur2021/07/14 01:21 AM
                                                  Alternatives?dmcq2021/07/14 02:06 AM
                                                    Alternatives?cqwrteur2021/07/14 02:50 AM
                                                  Alternatives?2021/07/15 07:33 AM
                                                    Alternatives?FrankHB2021/07/16 06:13 AM
                                            Alternatives?cqwrteur2021/07/13 11:39 PM
                                              Alternatives?Anon2021/07/14 01:08 AM
                                                Alternatives?cqwrteur2021/07/14 01:20 AM
                                                  Alternatives?dmcq2021/07/14 01:46 AM
                                                    Alternatives?cqwrteur2021/07/14 01:52 AM
                                                      Alternatives?dmcq2021/07/14 09:13 AM
                                                        Alternatives?dmcq2021/07/14 09:23 AM
                                                        Dealing with memory errorsBrendan2021/07/14 11:50 AM
                                                          Dealing with memory errorsdmcq2021/07/14 03:27 PM
                                                            Dealing with memory errorsBrendan2021/07/14 03:55 PM
                                                    Alternatives?cqwrteur2021/07/14 02:12 AM
                                                      Alternatives?Anon2021/07/14 03:16 AM
                                                        Alternatives?cqwrteur2021/07/14 05:55 AM
                                                      Alternatives?FrankHB2021/07/16 06:27 AM
                                                Alternatives?cqwrteur2021/07/14 01:38 AM
                                                  Alternatives?anon2021/07/14 02:50 AM
                                                    Stop feeding that trollnone2021/07/14 03:13 AM
                                                    Alternatives?cqwrteur2021/07/14 06:39 AM
                                                      Alternatives?Brendan2021/07/14 11:15 AM
                                                  Alternatives?Anon2021/07/14 03:19 AM
                                                    Alternatives?cqwrteur2021/07/14 06:12 AM
                                                      Alternatives?Anon2021/07/14 07:17 AM
                                                        Alternatives?cqwrteur2021/07/14 07:47 AM
                                                          Alternatives?Anon2021/07/14 12:00 PM
                                                            Alternatives?cqwrteur2021/07/14 12:44 PM
                                                          Alternatives?2021/07/15 09:36 AM
                                                  Alternatives?Gabriele Svelto2021/07/14 12:26 PM
                                                    Alternatives?cqwrteur2021/07/14 12:46 PM
                                                      Alternatives?Gabriele Svelto2021/07/14 01:36 PM
                                                        Alternatives?cqwrteur2021/07/14 01:55 PM
                                                          Alternatives?Smoochie2021/07/14 11:07 PM
                                                  Alternatives?2021/07/15 07:37 AM
                                                    Alternatives?Brendan2021/07/15 10:21 AM
                                                      Alternatives?Anon2021/07/15 12:15 PM
                                                  Alternatives?FrankHB2021/07/16 06:27 AM
                                          Alternatives?None2021/07/14 01:50 AM
                                            Alternatives?cqwrteur2021/07/14 01:54 AM
                                            Alternatives?cqwrteur2021/07/14 01:55 AM
                                              Alternatives?Rayla2021/07/14 04:47 AM
                                                Alternatives?cqwrteur2021/07/14 05:54 AM
                                              Alternatives?Gabriele Svelto2021/07/14 12:43 PM
                                Alternatives?FrankHB2021/07/12 11:47 PM
                            Alternatives?FrankHB2021/07/12 11:05 PM
                              Alternatives?Michael S2021/07/13 12:01 AM
                                Alternatives?FrankHB2021/07/13 12:25 AM
                            Alternatives?Doug S2021/07/12 11:29 PM
                              Alternatives?cqwrteur2021/07/12 11:48 PM
                              Alternatives?FrankHB2021/07/13 12:07 AM
              Is unsafe hell truly good for linux kernel in the future?2021/07/12 05:27 AM
                Is unsafe hell truly good for linux kernel in the future?Anon2021/07/12 08:46 AM
                Is unsafe hell truly good for linux kernel in the future?Etienne Lorrain2021/07/13 01:00 AM
    Is unsafe hell truly good for linux kernel in the future?cqwrteur2021/07/10 12:38 PM
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