Ryzen 9 5000 series processor

By: Linus Torvalds (torvalds.delete@this.linux-foundation.org), January 6, 2021 11:38 am
Room: Moderated Discussions
⚛ (0xe2.0x9a.0x9b.delete@this.gmail.com) on January 6, 2021 9:45 am wrote:
> Linus Torvalds (torvalds.delete@this.linux-foundation.org) on January 5, 2021 12:29 pm wrote:
> > ECC is safer under normal circumstances,
>
> What is "normal circumstances"? From a mathematical viewpoint, ECC DDR4 modules can afford to be of lower
> quality

Bullshit.

ECC safety isn't about the "correctable" part.

Why don't people get that? The correction part of ECC is almost irrelevant.

In fact, five lines later, you ask for the OS to do checksumming for DRAM problems, because you seem to realize that the only thing that really matters is reporting whether the memory you use is reliable or not.

That is why you need ECC. Not for correction. For knowing whether your machine is reliable or not. Without ECC, you're basically screwed. You have no idea.

(And yes, I've said it before, and I'll say it again: parity is almost as good as ECC. Exactly because parity does the important part - not as well, no, but certainly a lot better than nothing).

And no, it's not the job of the OS to fix broken hardware. Doing checksums of disk contents is one thing (but honestly, the disks themselves had better have those checksums internally anyway, and they do), but doing "software ECC" is just you desperately trying to make excuses and make up and argument that is complete and utter garbage.

And btw, don't talk to me about uncorrectable errors, or - worse yet - about undetectable three-bit flips, which is inevitably the next stage of denial. Do they happen? Sure. But the normal single-bit flips will happen before they do, and honestly, the whole argument of "but nothing is perfect" isn't an argument at all, it's just pure and utter stupidity.

So stop the idiocy already.

Linus
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TopicPosted ByDate
Ryzen 9 5000 series processor Phil9955112020/12/29 05:12 AM
  Ryzen 9 5000 series processor Adrian2020/12/29 07:31 AM
    Ryzen 9 5000 series processor Dummond D. Slow2020/12/29 10:33 AM
      Ryzen 9 5000 series processor Phil9955112020/12/29 04:09 PM
        Ryzen 9 5000 series processor Dummond D. Slow2020/12/29 06:00 PM
          Ryzen 9 5000 series processor anon2020/12/30 02:50 AM
          Ryzen 9 5000 series processor Foo_2020/12/30 02:50 AM
            Ryzen 9 5000 series processor Phil9955112020/12/30 05:22 AM
              Ryzen 9 5000 series processor Phil9955112020/12/30 05:25 AM
              Ryzen 9 5000 series processor Adrian2020/12/30 06:00 AM
            Ryzen 9 5000 series processor Linus Torvalds2020/12/30 12:00 PM
              Ryzen 9 5000 series processor Phil9955112020/12/31 06:45 AM
                Ryzen 9 5000 series processor Adrian2020/12/31 09:49 AM
                Ryzen 9 5000 series processor Linus Torvalds2020/12/31 12:05 PM
                  Ryzen 9 5000 series processor me2020/12/31 04:56 PM
                    Ryzen 9 5000 series processor Anon2020/12/31 05:48 PM
                      Ryzen 9 5000 series processor me2021/01/01 04:06 AM
                    Ryzen 9 5000 series processor Gabriele Svelto2021/01/01 07:10 AM
                      Ryzen 9 5000 series processor David Hess2021/01/01 07:37 AM
                        Ryzen 9 5000 series processor Jukka Larja2021/01/01 10:52 AM
                          Ryzen 9 5000 series processor Linus Torvalds2021/01/01 12:48 PM
                            Ryzen 9 5000 series processor Jukka Larja2021/01/01 10:28 PM
                              Ryzen 9 5000 series processor Linus Torvalds2021/01/02 12:21 PM
                                Ryzen 9 5000 series processor Adrian2021/01/02 01:17 PM
                                Ryzen 9 5000 series processor Anon2021/01/02 06:08 PM
                                Ryzen 9 5000 series processor Jukka Larja2021/01/02 11:10 PM
                                  Ryzen 9 5000 series processor David Hess2021/01/03 01:03 AM
                                    Ryzen 9 5000 series processor Jukka Larja2021/01/03 03:28 AM
                                  Threadrippers do have official ECC supportJukka Larja2021/01/03 08:32 PM
                                    Threadrippers do have official ECC supportBjörn Ragnar Björnsson2021/01/04 08:21 AM
                                ECC (or lack of)Tim McCaffrey2021/01/03 09:28 AM
                                  ECC (or lack of)Adrian2021/01/03 01:14 PM
                                    ECC (or lack of)Yuhong Bao2021/01/03 01:51 PM
                                      ECC (or lack of)Yuhong Bao2021/01/04 06:54 PM
                                        ECC (or lack of)Yuhong Bao2021/01/04 07:04 PM
                                AMD ECC not enabled but says it isIan Cutress2021/01/03 11:09 AM
                                  AMD ECC not enabled but says it isMaxwell2021/01/03 12:28 PM
                                  AMD ECC not enabled but says it isAdrian2021/01/03 12:50 PM
                                    AMD ECC not enabled but says it isGabriele Svelto2021/01/03 01:08 PM
                                      AMD ECC not enabled but says it isAdrian2021/01/03 01:34 PM
                                        AMD ECC not enabled but says it isDan Strother2021/01/03 07:00 PM
                                          AMD ECC not enabled but says it isMatt2021/01/04 12:29 AM
                                          AMD ECC not enabled but says it isGabriele Svelto2021/01/04 01:29 AM
                                            AMD ECC not enabled but says it isMatt2021/01/04 12:39 PM
                                          AMD ECC not enabled but says it isAdrian2021/01/04 05:49 AM
                                Ryzen 9 5000 series processor Jason Snyder2021/01/04 01:44 PM
                                  Ryzen 9 5000 series processor Brett2021/01/04 05:08 PM
                                  Ryzen 9 5000 series processor Linus Torvalds2021/01/05 12:29 PM
                                    Ryzen 9 5000 series processor Adrian2021/01/05 01:08 PM
                                    Ryzen 9 5000 series processor Emil Briggs2021/01/05 04:40 PM
                                      Ryzen 9 5000 series processor Gabriele Svelto2021/01/06 01:12 AM
                                    Ryzen 9 5000 series processor [ECC summary - Suitable for framing]Björn Ragnar Björnsson2021/01/05 06:29 PM
                                    Ryzen 9 5000 series processor 2021/01/06 09:45 AM
                                      Ryzen 9 5000 series processor Linus Torvalds2021/01/06 11:38 AM
                                        Ryzen 9 5000 series processor Emanuel Rylke2021/01/07 12:49 AM
                                          Ryzen 9 5000 series processor Jörn Engel2021/01/07 09:05 AM
                                            Read Only Page CorrectionsTerry Gray2021/01/07 09:47 AM
                                              Read Only Page Correctionsrwessel2021/01/07 11:00 AM
                                                Read Only Page CorrectionsTerry Gray2021/01/07 11:58 AM
                                              Read Only Page CorrectionsDavid Hess2021/01/10 07:37 PM
                                              Read Only Page Correctionsdmcq2021/01/11 03:32 AM
                                        Ryzen 9 5000 series processor Chester2021/01/07 05:00 AM
                                          Ryzen 9 5000 series processor Gabriele Svelto2021/01/07 05:33 AM
                                            Ryzen 9 5000 series processor Michael S2021/01/07 08:05 AM
                                              Ryzen 9 5000 series processor Linus Torvalds2021/01/07 10:26 AM
                                            Ryzen 9 5000 series processor rwessel2021/01/07 09:06 AM
                                          Ryzen 9 5000 series processor Linus Torvalds2021/01/07 10:04 AM
                                            Ryzen 9 5000 series processor Chester2021/01/07 04:19 PM
                                              OT L1 chache ECCMichael S2021/01/08 02:31 AM
                                                OT L1 chache ECCAdrian2021/01/08 08:54 AM
                                                  OT L1 chache ECCDavid Kanter2021/01/08 09:13 AM
                                                    Structure ProtectionsChester2021/01/08 02:14 PM
                                            Ryzen 9 5000 series processor Etienne Lorrain2021/01/08 01:18 AM
                                          Ryzen 9 5000 series processor Björn Ragnar Björnsson2021/01/07 05:42 PM
                                            Ryzen 9 5000 series processor Chester2021/01/07 08:14 PM
                                              Ryzen 9 5000 series processor Björn Ragnar Björnsson2021/01/07 08:26 PM
                                                Ryzen 9 5000 series processor Michael S2021/01/08 02:49 AM
                                    Ryzen 9 5000 series processor Jason Snyder2021/01/14 07:32 AM
                                      Ryzen 9 5000 series processor Gabriele Svelto2021/01/15 05:26 AM
                                        Ryzen 9 5000 series processor Jason Snyder2021/01/16 10:45 AM
                                          Ryzen 9 5000 series processor Jason Snyder2021/01/16 12:27 PM
                              Ryzen 9 5000 series processor Etienne Lorrain2021/01/07 01:21 AM
                                Ryzen 9 5000 series processor anon2021/01/07 02:21 AM
                                  Ryzen 9 5000 series processor Etienne Lorrain2021/01/07 03:22 AM
                                    Ryzen 9 5000 series processor Konrad Schwarz2021/01/07 05:27 AM
                                  Ryzen 9 5000 series processor Adrian2021/01/07 04:22 AM
                                  Ryzen 9 5000 series processor rwessel2021/01/07 09:25 AM
                                    Ryzen 9 5000 series processor Jörn Engel2021/01/07 04:29 PM
                                      Ryzen 9 5000 series processor rwessel2021/01/07 06:47 PM
                                        Ryzen 9 5000 series processor David Hess2021/01/11 04:26 AM
                                          Ryzen 9 5000 series processor Adrian2021/01/11 05:25 AM
                                          Ryzen 9 5000 series processor rwessel2021/01/11 07:24 AM
                                      Ryzen 9 5000 series processor Mark Roulo2021/01/07 07:00 PM
                                        Ryzen 9 5000 series processor Björn Ragnar Björnsson2021/01/07 07:20 PM
                                  Ryzen 9 5000 series processor David Hess2021/01/11 04:16 AM
                      Ryzen 9 5000 series processor Jukka Larja2021/01/01 10:43 AM
                        Ryzen 9 5000 series processor David Hess2021/01/01 12:31 PM
                          Ryzen 9 5000 series processor Dan Strother2021/01/01 01:12 PM
                        Ryzen 9 5000 series processor Adrian2021/01/01 01:28 PM
                          Ryzen 9 5000 series processor vs. M1Adrian2021/01/02 02:45 AM
                            Ryzen 9 5000 series processor vs. M1Dummond D. Slow2021/01/02 12:50 PM
                              Ryzen 9 5000 series processor vs. M1Adrian2021/01/02 02:00 PM
                                Ryzen 9 5000 series processor vs. M1Dummond D. Slow2021/01/04 12:11 PM
                            Ryzen 9 5000 series processor vs. M1Dummond D. Slow2021/01/07 10:43 AM
                              Ryzen 9 5000 series processor vs. M1Adrian2021/01/08 08:28 AM
                                Ryzen 9 5000 series processor vs. M1 Sorry, typo, correction hereAdrian2021/01/08 08:31 AM
                                  Ryzen 9 5000 series processor vs. M1 (vs. Rocket Lake)Dummond D. Slow2021/01/22 07:02 AM
                            isn't that an interesting contradiction?hobold2021/01/08 12:44 PM
                              isn't that an interesting contradiction?Maynard Handley2021/01/08 01:27 PM
                              isn't that an interesting contradiction?Adrian2021/01/08 02:21 PM
                                isn't that an interesting contradiction?Maynard Handley2021/01/08 03:59 PM
                                  isn't that an interesting contradiction?Maynard Handley2021/01/08 04:34 PM
                                    isn't that an interesting contradiction?Maynard Handley2021/01/08 04:34 PM
                                    isn't that an interesting contradiction?Maynard Handley2021/01/08 04:35 PM
                                      isn't that an interesting contradiction?Adrian2021/01/09 12:55 AM
                                  isn't that an interesting contradiction?Adrian2021/01/09 12:48 AM
                                    isn't that an interesting contradiction? - gmpAdrian2021/01/09 08:00 AM
                                      isn't that an interesting contradiction? - gmpnone2021/01/11 01:26 AM
                                        isn't that an interesting contradiction? - gmpAdrian2021/01/11 04:34 AM
                                          Fully agree with you, I was just giving some data :-) (NT)none2021/01/11 05:17 AM
                                          isn't that an interesting contradiction? - gmpanon2021/01/11 12:09 PM
                                            isn't that an interesting contradiction? - gmpAdrian2021/01/12 12:54 AM
                                              isn't that an interesting contradiction? - gmpnone2021/01/12 01:15 AM
                                                isn't that an interesting contradiction? - gmpAdrian2021/01/12 03:37 AM
                                                  isn't that an interesting contradiction? - gmpnone2021/01/12 03:53 AM
                                                    uses of int multiplyhobold2021/01/12 02:51 PM
                                                      uses of int multiplynone2021/01/13 01:11 AM
                                                      uses of int multiplyJörn Engel2021/01/13 12:06 PM
                                                  isn't that an interesting contradiction? - gmpWilco2021/01/12 04:17 AM
                                                    isn't that an interesting contradiction? - gmpAdrian2021/01/12 05:07 AM
                        Ryzen 9 5000 series processor Gabriele Svelto2021/01/01 03:31 PM
                          Ryzen 9 5000 series processor Jukka Larja2021/01/01 09:58 PM
                            Ryzen 9 5000 series processor Gabriele Svelto2021/01/02 05:51 AM
                              Ryzen 9 5000 series processor Jukka Larja2021/01/02 07:57 AM
                                Ryzen 9 5000 series processor me2021/01/02 04:30 PM
                                  Ryzen 9 5000 series processor Jukka Larja2021/01/02 10:43 PM
                        Ryzen 9 5000 series processor Björn Ragnar Björnsson2021/01/01 08:41 PM
                          Ryzen 9 5000 series processor Jukka Larja2021/01/01 09:53 PM
                            Ryzen 9 5000 series processor Adrian2021/01/02 01:03 AM
                              Ryzen 9 5000 series processor Jukka Larja2021/01/02 07:39 AM
                          Ryzen 9 5000 series processor Adrian2021/01/02 12:52 AM
                          Ryzen 9 5000 series processor me2021/01/02 05:56 AM
                            Ryzen 9 5000 series processor Michael S2021/01/02 11:41 AM
                              Ryzen 9 5000 series processor Adrian2021/01/02 12:43 PM
                              Ryzen 9 5000 series processor Jukka Larja2021/01/02 10:50 PM
                          Crucial/Micron ECC UDIMMsGabriele Svelto2021/01/02 06:09 AM
                            Crucial/Micron ECC UDIMMsMaxwell2021/01/02 09:45 AM
                              Crucial/Micron ECC UDIMMsYuhong Bao2021/01/02 06:29 PM
                  Ryzen 9 5000 series processor Phil9955112021/01/03 07:46 AM
  Ryzen 9 5000 series processor H_Heckuba2021/01/03 12:06 PM
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