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    Fix a Hyper-V Synthetic Driver Issue US$500

    Scheduled Pinned Locked Moved Bounties
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    • B
      bryan.paradis
      last edited by

      @carlmeek:

      I've given it a try.  No luck just yet.

      This is what I did:

      1. Reverted out previous kernel changes to take me back to a standard 2-1-Release.
      2. Downloaded your file into /boot/modules
      3. chmod +x
      4. Added to loader.conf.local
      5. Rebooted
      –Nothing at this point, no new network cards--
      6. Tried kldload hv_netvsc.ko and got this:

      KLD hv_netvsc.ko: depends on vmbus - not available or version mismatch
      linker_load_file: Unsupported file type
      kldload: can't load hv_netvsc.ko: Exec format error

      Regards,
      -Carl.

      move this one to /boot/modules and load it first kldload hv_vmbus.ko then kldload hv_netvsc.ko

      hv_vmbus.ko.amd64.txt

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      • C
        carlmeek
        last edited by

        Getting Close!  After the two KLDLoad statements, i can see HyperV network interfaces in ifconfig.  Not had a chance to test yet, i'll do that tonight.

        However - it's not working on boot.  I added these into loader.conf.local

        hv_vmbus_load="YES"
        hv_netvsc_load="YES"

        First couple of boots is fine - we have 4 network cards, 2 legacy (mapped to lan/wan) and 2 HV cards.
        Then i remove the legacy cards and reboot….And now it crashes on boot and reboots itself.
        It reboots just shortly after the question about wanting to remap the network cards pops up.  The crash is very quick, can't catch it's text.

        So, i tried booting with 4 cards connected, and then manually reassigning the adapters using option (1).  I did this, and as soon as i confirmed my changes are OK, same crash.  And now it crashes every boot.

        One interesting thing to note is that during the assigning of the adapters, the two HyperV adapters reported that they  are 'down', even though they are not.

        Finally i remove the hyperV adapters from the machine, and it boots happily and i can reassign back to the 'de' legacy adapters.

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        • C
          carlmeek
          last edited by

          I just tried another test.

          I booted up with 4x network cards as before.
          I then manually loaded the kernel modules.
          i then used ifconfig to assign an IP address…. and it crashed. same crash.

          kldload hv_vmbus.ko
          kldload hv_netvsc.ko
          ifconfig hn0 1.2.3.4 255.255.255.0
          **crash **

          it only appears for a sec so i can't capture it...but i got it from the logs:

          Timecounter "Hyper-V" frequency 10000000 Hz quality 10000000
          vmbus0: [FILTER]
          padlock0: No ACE support.
          Netvsc probe… DONE
          hn0: <synthetic network="" interface="">on vmbus0
          Netvsc initializing... done!
          Netvsc probe... DONE
          hn1: <synthetic network="" interface="">on vmbus0
          Netvsc initializing... Already initialized!
          Netvsc initializing... Already initialized!

          Fatal trap 12: page fault while in kernel mode
          cpuid = 0; apic id = 00
          fault virtual address = 0x800
          fault code = supervisor read data, page not present
          instruction pointer = 0x20:0xffffffff8194d472
          stack pointer         = 0x28:0xffffff8027955970
          frame pointer         = 0x28:0xffffff80279559f0
          code segment = base 0x0, limit 0xfffff, type 0x1b
          = DPL 0, pres 1, long 1, def32 0, gran 1
          processor eflags = interrupt enabled, resume, IOPL = 0
          current process = 12 (swi4: hv_event)
          version.txt06000024112272726133  7615 ustarrootwheelFreeBSD 8.3-RELEASE-p11 #1: Wed Sep 11 18:59:48 EDT 2013
              root@snapshots-8_3-amd64.builders.pfsense.org:/usr/obj.pfSense/usr/pfSensesrc/src/sys/pfSense_SMP.8</synthetic></synthetic>

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          • B
            bryan.paradis
            last edited by

            @carlmeek:

            I just tried another test.

            I booted up with 4x network cards as before.
            I then manually loaded the kernel modules.
            i then used ifconfig to assign an IP address…. and it crashed. same crash.

            kldload hv_vmbus.ko
            kldload hv_netvsc.ko
            ifconfig hn0 1.2.3.4 255.255.255.0
            **crash **

            it only appears for a sec so i can't capture it...but i got it from the logs:

            Timecounter "Hyper-V" frequency 10000000 Hz quality 10000000
            vmbus0: [FILTER]
            padlock0: No ACE support.
            Netvsc probe… DONE
            hn0: <synthetic network="" interface="">on vmbus0
            Netvsc initializing... done!
            Netvsc probe... DONE
            hn1: <synthetic network="" interface="">on vmbus0
            Netvsc initializing... Already initialized!
            Netvsc initializing... Already initialized!

            Fatal trap 12: page fault while in kernel mode
            cpuid = 0; apic id = 00
            fault virtual address = 0x800
            fault code = supervisor read data, page not present
            instruction pointer = 0x20:0xffffffff8194d472
            stack pointer         = 0x28:0xffffff8027955970
            frame pointer         = 0x28:0xffffff80279559f0
            code segment = base 0x0, limit 0xfffff, type 0x1b
            = DPL 0, pres 1, long 1, def32 0, gran 1
            processor eflags = interrupt enabled, resume, IOPL = 0
            current process = 12 (swi4: hv_event)
            version.txt06000024112272726133  7615 ustarrootwheelFreeBSD 8.3-RELEASE-p11 #1: Wed Sep 11 18:59:48 EDT 2013
                root@snapshots-8_3-amd64.builders.pfsense.org:/usr/obj.pfSense/usr/pfSensesrc/src/sys/pfSense_SMP.8</synthetic></synthetic>

            Is there anymore log information avaliable? Can you run "bt" or "backtrace" after it crashes.

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            • C
              carlmeek
              last edited by

              BT and Backtrace are command not found.  But here is the entire log from the web front end:

              Crash report is over max size for the forum, so it's here.
              https://drive.google.com/file/d/0BwOWfIoqpmmfZ25LQmlTemVpVU0/edit?usp=sharing

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              • C
                carlmeek
                last edited by

                Just tested again on a second, new build, virtual machine - same result. Kernel crash whenever you assign an IP to bring an interface up.

                I wonder - from the previous instructions where the kernel had to be recompiled - the fact they had to disable the fast IDE driver.  Something connected to this?  I'm just speculating.

                -C

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                • B
                  bryan.paradis
                  last edited by

                  @carlmeek:

                  Just tested again on a second, new build, virtual machine - same result. Kernel crash whenever you assign an IP to bring an interface up.

                  I wonder - from the previous instructions where the kernel had to be recompiled - the fact they had to disable the fast IDE driver.  Something connected to this?  I'm just speculating.

                  -C

                  I don't think so as the whole package does a bunch of stuff. This is just the vmbus and the netsvc driver. I can try with the older driver source next. This was from current source. I would have to do a lot of file comparing to see where abouts the issue is with the vmbus driver. Does it survive a ifconfig interface up? Or is it just crashing on assign

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                  • C
                    carlmeek
                    last edited by

                    I just tried 'ifconfig hn0 up'…. instant death.

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                    • B
                      bryan.paradis
                      last edited by

                      @carlmeek:

                      I just tried 'ifconfig hn0 up'…. instant death.

                      You may just want to wait until the next pfsense release as the hyperv drivers may potentially be built in.

                      Well here is compiled from 8.2

                      hv_vmbus.ko.amd64.txt
                      hv_netvsc.ko.amd64.txt

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                      • B
                        bryan.paradis
                        last edited by

                        https://forum.pfsense.org/index.php/topic,56565.msg393651.html#new

                        Bill seems to be up and running

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                        • C
                          carlmeek
                          last edited by

                          I'm also up and running, with that same image…. BUT ....

                          Every time i reboot my box, the interfaces swap!  hv0 and hv1 literally swap.

                          Any clues on how they are mapped to try and stop this?

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                          • B
                            bryan.paradis
                            last edited by

                            @carlmeek:

                            I'm also up and running, with that same image…. BUT ....

                            Every time i reboot my box, the interfaces swap!  hv0 and hv1 literally swap.

                            Any clues on how they are mapped to try and stop this?

                            I think they were talking about it in that thread a bit. Please do an ifconfig of the swap

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                            • C
                              carlmeek
                              last edited by

                              As soon as heavy traffic goes on the box - it crashes:

                              Sleeping thread (tid 100036, pid 12) owns a non-sleepable lock
                              sched_switch() at sched_switch+0x102
                              mi_switch() at mi_switch+0x176
                              sleepq_wait() at sleepq_wait+0x42
                              _sx_xlock_hard() at _sx_xlock_hard+0x305
                              hn_start() at hn_start+0x57d
                              if_transmit() at if_transmit+0xea
                              ether_output_frame() at ether_output_frame+0x33
                              ether_output() at ether_output+0x50d
                              ip_output() at ip_output+0xda9
                              tcp_output() at tcp_output+0xa7d
                              tcp_do_segment() at tcp_do_segment+0xbbc
                              tcp_input() at tcp_input+0xcb8
                              ip_input() at ip_input+0x162
                              netisr_dispatch_src() at netisr_dispatch_src+0x7b
                              ether_demux() at ether_demux+0x169
                              ether_input() at ether_input+0x191
                              netvsc_recv() at netvsc_recv+0x202
                              hv_rf_on_receive() at hv_rf_on_receive+0x147
                              hv_nv_on_channel_callback() at hv_nv_on_channel_callback+0x38e
                              hv_vmbus_on_events() at hv_vmbus_on_events+0xa8
                              intr_event_execute_handlers() at intr_event_execute_handlers+0x104
                              ithread_loop() at ithread_loop+0x95
                              fork_exit() at fork_exit+0x11f
                              fork_trampoline() at fork_trampoline+0xe
                              –- trap 0, rip = 0, rsp = 0xffffff8000125d00, rbp = 0 ---
                              panic: sleeping thread
                              cpuid = 1
                              KDB: enter: panic
                              panic.txt0600001712274404005  7134 ustarrootwheelsleeping threadversion.txt06000022412274404005  7607 ustarrootwheelFreeBSD 8.3-RELEASE-p11 #0: Sun Sep 15 12:27:10 PDT 2013
                                  root@fbsd83minx64.corp.itbxb.com:/usr/obj.pfSense/usr/pfSensesrc/src/sys/pfSense_SMP.8

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                              • C
                                carlmeek
                                last edited by

                                Bounty increased to $1000 for a fix to the instability.

                                1 Reply Last reply Reply Quote 0
                                • B
                                  bryan.paradis
                                  last edited by

                                  I would install a FreeBSD 10 VM and load up the same network configuration and see if the problem still exists. You could also try making sure pfsense only has 1 CPU available.

                                  1 Reply Last reply Reply Quote 0
                                  • A
                                    alexappleton
                                    last edited by

                                    Posted up a SkyDrive link to a Hyper-V VM export of the 2.1 Release here:

                                    http://sdrv.ms/1565IAQ-

                                    Also sent PM.  I've deployed this in many areas, works really well for hosted solutions and have pushed well over 100mb through this without issues for over a year now.  Also had much feedback on success stories with this.

                                    However…..

                                    I am still having issues with CARP, and VLANs directly within pfSense.  VLANs can be set on the settings of the VM in Hyper-V manager virtual NIC settings.  CARP I believe I have a workaround for which is in testing right now.

                                    If this works and you want to reward the bounty I want half to go to a charity of my choice.  Other half will go towards getting CARP working as well as any other bugs that may be around.

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                                    • P
                                      pingpong
                                      last edited by

                                      The previous version of the Hyper-V drivers (older than those included with FreeBSD 10.0 Release) contain a bug in which the management of a critical thread lock is not handled properly.  It does not seem to cause an issue for systems allocated two NICs at low transfer speeds (below 100Mbits).  I have been able to consistently cause a kernel panic in pfsense 2.1 with the original Hyper-V drivers when the VM has three or more NICs  and is moving data at rates above 100Mbits.

                                      I would propose a back port of the drivers included with FreeBSD 10.0 Release as a resolution to your problem.

                                      1 Reply Last reply Reply Quote 0
                                      • B
                                        bryan.paradis
                                        last edited by

                                        @pingpong:

                                        The previous version of the Hyper-V drivers (older than those included with FreeBSD 10.0 Release) contain a bug in which the management of a critical thread lock is not handled properly.  It does not seem to cause an issue for systems allocated two NICs at low transfer speeds (below 100Mbits).  I have been able to consistently cause a kernel panic in pfsense 2.1 with the original Hyper-V drivers when the VM has three or more NICs  and is moving data at rates above 100Mbits.

                                        I would propose a back port of the drivers included with FreeBSD 10.0 Release as a resolution to your problem.

                                        I had a look at the code and the changes and it looks like it goes rather deep. Would need to grab all the different source versions and put it through a differencing then apply all the base file changes across to support the newer driver source. Best bet would be the newer release of pfsense? Anyone try one of the alpha builds based on FreeBSD 10?

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                                        • P
                                          pingpong
                                          last edited by

                                          I have tried to compile the development branch against FreeBSD 10.0 Release.  I did not get very far with the various build errors.  It would appear the development team is still working on getting the environment copasetic with the new OS.

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                                          • B
                                            bryan.paradis
                                            last edited by

                                            @pingpong:

                                            I have tried to compile the development branch against FreeBSD 10.0 Release.  I did not get very far with the various build errors.  It would appear the development team is still working on getting the environment copasetic with the new OS.

                                            https://forum.pfsense.org/index.php/topic,72887.0.html

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