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    "Page fault while in kernel mode" on APU2 after bios/coreboot upgrade

    Scheduled Pinned Locked Moved General pfSense Questions
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    • kiokomanK
      kiokoman LAYER 8
      last edited by kiokoman

      it can be useful for others with this kind of errors but

      it's the MCI status register, not the RAM bank

      ECC error (ADDR valid) 0x9426c0010b000813
      ECC error overflow (ADDR valid) 0xd426c0010b000813
      ECC error (ADDR invalid) 0x9026c0010b000813
      ECC error overflow (ADDR invalid) 0xd026c0010b000813
      L1 Cache Data Store error (UE) 0xb600200000000145
      **L1 Instruction Cache (Instruction Fetch) error (ADDR valid) 0x9400000000000151**
      L1 Instruction Cache (Instruction Fetch) error overflow (ADDR valid) 0xd400000000000151
      Bus Unit (L2 Cache) error (UE) 0xb600000000020136
      L2 Data Cache (Line Fill) error (ADDR valid) 0x9400400000000136
      L2 Data Cache (Line Fill) error overflow (ADDR valid) 0xd400400000000136
      

      this is specific for this CPU:

      The error-reporting machine check register banks supported in this processor are:
      • MC0: Data cache (DC).
      • MC1: Instruction cache (IC). <- "MCA bank 1"
      • MC2: Bus unit (BU), including L2 cache.
      • MC3: Reserved.
      • MC4: Northbridge (NB), including the IO link. These MSRs are also accessible from configuration
      space. There is only one NB error-reporting bank, independent of the number of cores.
      • MC5: Fixed-issue reorder buffer (FR) machine check registers.
      

      ̿' ̿'\̵͇̿̿\з=(◕_◕)=ε/̵͇̿̿/'̿'̿ ̿
      Please do not use chat/PM to ask for help
      we must focus on silencing this @guest character. we must make up lies and alter the copyrights !
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      • kiokomanK
        kiokoman LAYER 8
        last edited by kiokoman

        @CS
        CPU ID 0 and CPU ID 1 it's probably a dual core cpu ?
        timeout stopping CPUs, it was unable to speak with the CPU
        with spin lock held too long, it's basically telling you: "I can't wait forever here, so I guess I'll stop and panic"
        based on what you had before I would check CPU settings like overclock / voltage / frequency, overheat, and dust on the fan if there is one

        Does it seem to be a common problem for Apu2 ? https://forum.netgate.com/topic/156830/could-you-help-me-analyze-these-crashdumps?_=1602587866619

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        we must focus on silencing this @guest character. we must make up lies and alter the copyrights !
        Don't forget to Upvote with the 👍 button for any post you find to be helpful.

        C 1 Reply Last reply Reply Quote 0
        • C
          CS @kiokoman
          last edited by

          @kiokoman APU2 has a single AMD Embedded G series GX-412TC, 4 CPUs: 1 package x 4 cores.
          No overclocking and no active cooling in place for these boards.

          Reference: https://pcengines.ch/apu2.htm

          1 Reply Last reply Reply Quote 0
          • kiokomanK
            kiokoman LAYER 8
            last edited by kiokoman

            ah i didn't understand that the problem was solved
            so it was Core Performance Boost
            it was probably overclocking the cpu

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            • C
              CS
              last edited by

              @kiokoman correct, "Core Performance Boost" was causing it and we were trying to find out why considering that other folks have it enabled on APU2 without experiencing any issues.

              DaddyGoD 1 Reply Last reply Reply Quote 0
              • kiokomanK
                kiokoman LAYER 8
                last edited by

                we have a saying in Italy, literally translated as ‘not all donuts come out with a hole’ meaning ‘not everything turns out as planned’ 😂
                it's called "silicon lottery", not all cpu are the same, there is ample opportunity for some microscopic part of a CPU, which works fine at a certain speed/voltage combination, to no work if the speed or voltage is increased.

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                • fireodoF
                  fireodo @CS
                  last edited by fireodo

                  @CS said in "Page fault while in kernel mode" on APU2 after bios/coreboot upgrade:

                  @DaddyGo, @fireodo , @stephenw10

                  Could anyone share their APU2 loader.config.local file for reference? I'm wondering if I'm missing something obvious, I haven't done any tuning for years because it has been running smoothly with no issues.

                  Hi, here the content of my loader.config.local:

                  legal.intel_ipw.license_ack=1
                  legal.intel_iwi.license_ack=1
                  debug.acpi.avoid="_SB_.PCI0.GPIO" (necessary for loading apuled.ko)

                  if you still have "hint.acpi_perf.0.disabled=1" in your loader.conf.local you will see those increased frecv. in sysctl dev.cpu even when you have disabled CPB in BIOS.

                  Regards,
                  fireodo

                  Kettop Mi4300YL CPU: i5-4300Y @ 1.60GHz RAM: 8GB Ethernet Ports: 4
                  SSD: SanDisk pSSD-S2 16GB (ZFS) WiFi: WLE200NX
                  pfsense 2.8.0 CE
                  Packages: Apcupsd, Cron, Iftop, Iperf, LCDproc, Nmap, pfBlockerNG, RRD_Summary, Shellcmd, Snort, Speedtest, System_Patches.

                  1 Reply Last reply Reply Quote 0
                  • DaddyGoD
                    DaddyGo @CS
                    last edited by

                    @CS said in "Page fault while in kernel mode" on APU2 after bios/coreboot upgrade:

                    other folks have it enabled on APU2 without experiencing any issues.

                    I confirm this 😉

                    we have lot of such units at end users, they are "run" with CPB without any problems
                    we basically configure these "routers / NGFWs" + pfSense with CPB

                    CPB as I wrote above has been enabled in the Coreboot BIOS, but can only be interpreted on 1 core with a frequency of 1,400 instead of 1,000 this is good for OpenVPN stuff, for example...

                    @CS I think don't look for the rabbit in the bush...
                    this is not an issue whic is caused by CPB or pfSense

                    I think the APU2 MOBO is damaged somewhere, cold soldering or something like that

                    which causes a malfunction in the BUS or RAM operation due to the elevated clock....???

                    maybe try a CPU shock test under linux and insulate the APU2 housing to warm up .....Voilà, maybe there will be results

                    @kiokoman anyway, this is an AMD embedded series CPU can not really be overdriven, designed for low-power devices
                    either it works or it doesn't, there is no overclocking it only the CPB allows for a small tuning...

                    Cats bury it so they can't see it!
                    (You know what I mean if you have a cat)

                    1 Reply Last reply Reply Quote 0
                    • C
                      CS
                      last edited by

                      @DaddyGo @fireodo I won't continue troubleshooting this honestly, the board works fine for me with CPB disabled and I still get the boosted CPU frequency by having the right settings in my loader.conf.local. I'm not even sure if my performance would get any better! Actually, I'm now wondering, just out of curiosity, if this happens when you have both, the CPU boost settings in loader.conf.local and the BIOS setting enabled.

                      G 1 Reply Last reply Reply Quote 1
                      • AKEGECA
                        AKEGEC
                        last edited by

                        @CS , every hardware has a different outcome in Q.C. Even with the same parts, but a different batch.
                        Rule of thumb, 4 years lifespan (4 is death in Chinese). Nowadays you should be happy if your electronic works for more than 4 years.

                        I am not sure how handy you are but you could try heating up the cpu (without thermal paste) with the heat gun on a flat surface. Keep around 10 cm distance with circular motion for around 10-15 mins. But be warn, you could burn the cpu.

                        DaddyGoD 1 Reply Last reply Reply Quote 0
                        • DaddyGoD
                          DaddyGo @AKEGEC
                          last edited by

                          @AKEGEC said in "Page fault while in kernel mode" on APU2 after bios/coreboot upgrade:

                          but you could try heating up the cpu (without thermal paste) with the heat gun on a flat surface.

                          It's a very bad idea.
                          This AMD CPU reaches its maximum TDP in about 40 seconds without a cooling surface (heat shrink) and dies...
                          (moreover as I wrote it is an embedded CPU, soldered to the PCB)
                          (earlier than the said Chinese 4-year death)

                          the pcEngines stuff is stable and we have several pieces of it that has been working for 6 years (from ALIX and APU series)

                          The ALIXs works as a radio os WISP PtP and AP and is constantly exposed to the weather.
                          So these are not subject to your Chinese rule 😉

                          Cats bury it so they can't see it!
                          (You know what I mean if you have a cat)

                          AKEGECA 1 Reply Last reply Reply Quote 0
                          • AKEGECA
                            AKEGEC @DaddyGo
                            last edited by

                            @DaddyGo said in "Page fault while in kernel mode" on APU2 after bios/coreboot upgrade:

                            It's a very bad idea.
                            This AMD CPU reaches its maximum TDP in about 40 seconds without a cooling surface (heat shrink) and dies...
                            (moreover as I wrote it is an embedded CPU, soldered to the PCB)
                            (earlier than the said Chinese 4-year death)

                            the pcEngines stuff is stable and we have several pieces of it that has been working for 6 years (from ALIX and APU series)

                            The ALIXs works as a radio os WISP PtP and AP and is constantly exposed to the weather.
                            So these are not subject to your Chinese rule 😉

                            Well to solder embedded cpu you need a temperature between 200-400°c.
                            Anyway I was talking about heating it up a bit. As long you are not reaching 90°c you will be fine. But if it already passed the 4 years mark, then I would leave it as it is. 😏
                            I don't know why manufactures are shortening their products lifespan. It used to be 15-30 years quality guarantee.

                            DaddyGoD 1 Reply Last reply Reply Quote 0
                            • DaddyGoD
                              DaddyGo @AKEGEC
                              last edited by DaddyGo

                              @AKEGEC said in "Page fault while in kernel mode" on APU2 after bios/coreboot upgrade:

                              Well to solder embedded cpu you need a temperature between 200-400°c.

                              Yes, this soldering temperature is a separate data in the catalog and the automatic production lines (soldering machines) solder to the permitted seconds. (2 - 3s)
                              The temperature of the inner silicon layer of the CPU does not tolerate this temperature (cca. 150 max).

                              I don't know, if you already had an APU MOBO in your hand?
                              So this is what it looks like...
                              (the metal router housing itself cools the CPU and connects to the metal surface with a bit of heat transfer)

                              fc118a87-03a7-4d5d-9522-c1531c604811-image.png

                              https://www.pcengines.ch/apucool.htm

                              As I wrote above, the test method for the following may be, CPU shock test under f.e. Linux and while covering the house.

                              Once we launched such a MOBO without its metal housing for testing and it "boiled" quickly under load.

                              You're right, half of today's stuff can't stand it until then 25-30 years. 😞
                              Anno, I even repaired 30-year-old cathode ray tubes and black and white televisions and continued to operate for another 10 years.

                              Welcome to today's money-hungry world. hahahahaha 😉

                              Cats bury it so they can't see it!
                              (You know what I mean if you have a cat)

                              1 Reply Last reply Reply Quote 1
                              • AKEGECA
                                AKEGEC
                                last edited by

                                @DaddyGo , did we just revealed our age? hahahahahaa
                                Oh well age is just a number. 😊

                                DaddyGoD 1 Reply Last reply Reply Quote 0
                                • DaddyGoD
                                  DaddyGo @AKEGEC
                                  last edited by

                                  @AKEGEC said in "Page fault while in kernel mode" on APU2 after bios/coreboot upgrade:

                                  did we just revealed our age?

                                  Not a shame ...
                                  the age, I think, brings wisdom

                                  yea and everyone is as old as he/she feel 😉

                                  droll - quadragenarian, hihihihi

                                  Cats bury it so they can't see it!
                                  (You know what I mean if you have a cat)

                                  1 Reply Last reply Reply Quote 0
                                  • G
                                    garywagstaff @CS
                                    last edited by

                                    @cs Thank you CS, I found this post after a couple of weeks of trying to sort out the exact same issue. I cant count the different firmwares I tried and reinstalls of PFsense. Even tried OPNsense. Long story short updated to v4.13.0.3 BIOS disabled CPB and my firewall has been stable since. Uptime 18 Hours 56 Minutes 32 Seconds at present, but I am quietly confident that the issue is resolve.

                                    Once again thank you.

                                    K 1 Reply Last reply Reply Quote 0
                                    • K
                                      Kuser @garywagstaff
                                      last edited by

                                      @cs Thank you very much for this post, it seems I have the same issue... Is this due to a defective board/cpu - has your firewall been running stable since disabling SPB?

                                      C 1 Reply Last reply Reply Quote 0
                                      • C
                                        CS @Kuser
                                        last edited by

                                        @kuser Super stable, I have had no issues at all since then!

                                        K 1 Reply Last reply Reply Quote 0
                                        • K
                                          Kuser @CS
                                          last edited by

                                          @cs Thanks for the feedback. Looks like they've found a bug.
                                          I reported this issue a couple of weeks ago:
                                          https://github.com/pcengines/coreboot/issues/469

                                          1 Reply Last reply Reply Quote 1
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