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    host crash - guest_4.o#sh_page_fault__guest

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    • R Offline
      r1 XCP-ng Team
      last edited by

      Guest tools should not be able to crash host - it will be treated as critical bug. Your stack is similar to that of reported earlier. And even though you have updated Xen version, the trigger could be something else...

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      • DanpD Offline
        Danp Pro Support Team
        last edited by

        FWIW, it appears that my fully patched 7.6 xcp host also rebooted the morning of 2/27

        System Booted: 2019-02-27 04:46

        I haven't dug into the logs yet.

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        • R Offline
          r1 XCP-ng Team
          last edited by

          @Steve_Sibilia @Danp @borzel can you share # xenpm get-cpuidle-states and BIOS power saving settings?

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          • DanpD Offline
            Danp Pro Support Team
            last edited by

            Here the cpuidlestates.txt. Unsure how to get the BIOS settings without rebooting.

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            • S Offline
              Steve_Sibilia @r1
              last edited by

              @r1 yes for sure.
              Here: https://cloud.sinapto.net/index.php/s/0X8GdLxnTrw6bmd the output pf get-cpu-idle-states.
              Power management is set up for maximun performance, power cap is disabled.
              The system is a Dell poweredge r640.
              Let me know if you need more details.
              Steve

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              • R Offline
                r1 XCP-ng Team
                last edited by

                @stormi

                While digging on multiple things I'm curious on one patch

                https://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=9dc1e0cd81ee469d638d1962a92d9b4bd2972bfa

                It seems to have been applied on

                1. master
                  https://xenbits.xen.org/gitweb/?p=xen.git;a=history;f=xen/arch/x86/mm/shadow/multi.c;h=7dc39d75651e0bd85fe9a4b5c6c586648d7a7ab2;hb=refs/heads/master

                2. stable-4.9 https://xenbits.xen.org/gitweb/?p=xen.git;a=history;f=xen/arch/x86/mm/shadow/multi.c;h=7dc39d75651e0bd85fe9a4b5c6c586648d7a7ab2;hb=refs/heads/stable-4.9

                But its not there on

                1. stable-4.8 https://xenbits.xen.org/gitweb/?p=xen.git;a=history;f=xen/arch/x86/mm/shadow/multi.c;h=7dc39d75651e0bd85fe9a4b5c6c586648d7a7ab2;hb=refs/heads/stable-4.8

                and

                1. stable-4.7 https://xenbits.xen.org/gitweb/?p=xen.git;a=history;f=xen/arch/x86/mm/shadow/multi.c;h=7dc39d75651e0bd85fe9a4b5c6c586648d7a7ab2;hb=refs/heads/stable-4.7

                And I think this could have relation of the host crash mentioned above. The function guest_walk_to_gfn is used in stable-4.7 but not at places mentioned by this specific patch.

                Will try to find more on this, my tomorrow.

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                • S Offline
                  Steve_Sibilia
                  last edited by

                  A quick update.
                  This morning we had another crash. Same host, same guest involved.

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                  • stormiS Offline
                    stormi Vates 🪐 XCP-ng Team
                    last edited by

                    You can try this workaround: boot your host with the "pcid=0" parameter. This will likely have an impact on performance but should avoid the crash.

                    Reference: https://lists.xenproject.org/archives/html/xen-devel/2019-01/msg00006.html

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                    • stormiS Offline
                      stormi Vates 🪐 XCP-ng Team
                      last edited by stormi

                      Security advisories have just been published on http://xenbits.xen.org/xsa/

                      The host crash you experienced is probably related to http://xenbits.xen.org/xsa/advisory-294.html

                      We will provide updated Xen packages as soon as they are ready.

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                      • S Offline
                        Steve_Sibilia
                        last edited by

                        Thank You for the update.

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