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Date:      Fri, 08 Jan 2016 00:03:51 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-bugs@FreeBSD.org
Subject:   [Bug 206016] Changing MTU on the interface Infiniband network card (Mellanox MHQH29B-XTR) causes panic
Message-ID:  <bug-206016-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=206016

            Bug ID: 206016
           Summary: Changing MTU on the interface Infiniband network card
                    (Mellanox MHQH29B-XTR) causes panic
           Product: Base System
           Version: 10.1-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: bin
          Assignee: freebsd-bugs@FreeBSD.org
          Reporter: admin@support.od.ua

I bought on ebay.com map Mellanox Infiniband CONNECTX-2 MHQH29B-XTR
( http://www.mellanox.com/page/products_dyn?product_family=4 )

After installing and loading drivers V2.1.6 site Mellanox, the card identifies:
mlx4_core0@pci0:6:0:0:  class=0x028000 card=0x002115b3 chip=0x673c15b3 rev=0xb0
hdr=0x00
    vendor     = 'Mellanox Technologies'
    device     = 'MT26428 [ConnectX VPI PCIe 2.0 5GT/s - IB QDR / 10GigE]'
    class      = network
mlxen1: flags=8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
       
options=d07bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWFILTER,VLAN_HWTSO,LINKSTATE>
        ether 00:00:00:00:00:01
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
        media: Ethernet autoselect (autoselect <full-duplex,rxpause,txpause>)
        status: active

But after trying to change mtu - ifconfig mlxen1 mtu 1500 UP - server
immediately is gone to reboot :(

P.S.

FreeBSD 10.1-PRERELEASE #0: Fri Sep  5 03:04:51 EEST 2014    
root@core.domain.com:/usr/obj/usr/src/sys/core.domain.com.2  amd64


I load all modules:
# ll /boot/modules
total 1799
-rw-r--r--  1 root  101  652720  8 янв 00:57 ibcore.ko
-rw-r--r--  1 root  101   99104  8 янв 00:58 ipoib.ko
-rw-r--r--  1 root  101  429616  8 янв 00:58 mlx4.ko
-rw-r--r--  1 root  101  256752  8 янв 00:59 mlx4ib.ko
-rw-r--r--  1 root  101  136736  8 янв 00:59 mlxen.ko

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