[Bug 225791] ena driver causing kernel panics on AWS EC2

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225791

jaehak <crane76 at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |crane76 at gmail.com

--- Comment #26 from jaehak <crane76 at gmail.com> ---
I have same problem(ena interface going down and up repeatedly).
# uname -a
FreeBSD db-20 11.2-RELEASE-p4 FreeBSD 11.2-RELEASE-p4 #0: Thu Sep 27 08:16:24
UTC 2018     root at amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC 
amd64

# ifconfig ena0
ena0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=422<TXCSUM,JUMBO_MTU,LRO>
        ether 06:4d:4b:64:e1:86
        hwaddr 06:4d:4b:64:e1:86
        inet6 fe80::44d:4bff:fe64:e186%ena0 prefixlen 64 scopeid 0x1
        inet 10.1.20.20 netmask 0xffffff00 broadcast 10.1.20.255
        nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
        media: Ethernet autoselect (10Gbase-T <full-duplex>)
        status: active


AWS r5.large instance.
It was 11.1 release. I upgraded to 11.2 with freebsd-update.

But, my another instance is very stable
r4.large
# uname -a
FreeBSD web-10 11.1-RELEASE-p1 FreeBSD 11.1-RELEASE-p1 #0: Wed Aug  9 11:55:48
UTC 2017     root at amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC 
amd64

# ifconfig ena0
ena0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=422<TXCSUM,JUMBO_MTU,LRO>
        ether 06:01:57:54:03:a2
        hwaddr 06:01:57:54:03:a2
        inet6 fe80::401:57ff:fe54:3a2%ena0 prefixlen 64 scopeid 0x1
        inet 10.1.20.10 netmask 0xffffff00 broadcast 10.1.20.255
        nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
        media: Ethernet autoselect (10Gbase-T <full-duplex>)
        status: active

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