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Date:      Wed, 30 Nov 2016 09:19:38 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-bugs@FreeBSD.org
Subject:   [Bug 211990] iscsi fails to reconnect and does not release devices
Message-ID:  <bug-211990-8-VysGSmZKA0@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-211990-8@https.bugs.freebsd.org/bugzilla/>
References:  <bug-211990-8@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D211990

--- Comment #33 from Julien Cigar <julien@perdition.city> ---
an update on this: I turned off jumbo frames and TSO on the replication
interface and the issue hasn't been repeated until now...!

filer1% uptime
10:15AM  up 18 days, 13:35, 1 user, load averages: 0.07, 0.09, 0.08

filer1% vmstat -z|head -1;vmstat -z|grep -i 'mbuf'
ITEM                   SIZE  LIMIT     USED     FREE      REQ FAIL SLEEP
mbuf_packet:            256, 3200070,    1024,    3403,527205862,   0,   0
mbuf:                   256, 3200070,       6,    2752,456285246,   0,   0
mbuf_cluster:          2048, 500010,    4427,     355,18287308,   0,   0
mbuf_jumbo_page:       4096, 250005,       0,      71, 2682330,   0,   0
mbuf_jumbo_9k:         9216,  74075,       0,       0,       0,   0,   0
mbuf_jumbo_16k:       16384,  41667,       0,       0,       0,   0,   0
mbuf_ext_refcnt:          4,      0,       0,       0,       0,   0,   0

filer1% netstat -m
1031/6154/7185 mbufs in use (current/cache/total)
1024/3758/4782/500010 mbuf clusters in use (current/cache/total/max)
1024/3403 mbuf+clusters out of packet secondary zone in use (current/cache)
0/71/71/250005 4k (page size) jumbo clusters in use (current/cache/total/ma=
x)
0/0/0/74075 9k jumbo clusters in use (current/cache/total/max)
0/0/0/41667 16k jumbo clusters in use (current/cache/total/max)
2305K/9338K/11644K bytes allocated to network (current/cache/total)
0/0/0 requests for mbufs denied (mbufs/clusters/mbuf+clusters)
0/0/0 requests for mbufs delayed (mbufs/clusters/mbuf+clusters)
0/0/0 requests for jumbo clusters delayed (4k/9k/16k)
0/0/0 requests for jumbo clusters denied (4k/9k/16k)
0 requests for sfbufs denied
0 requests for sfbufs delayed
0 requests for I/O initiated by sendfile

filer1% netstat -I bge1
Name    Mtu Network       Address              Ipkts Ierrs Idrop    Opkts O=
errs
 Coll
bge1   1500 <Link#2>      xx:xx:xx:xx:xx:xx 497577171     0     0 262946639=
=20=20=20=20
0     0
bge1      - 10.20.30.0    10.20.30.31       497575590     -     - 262942638=
=20=20=20=20
-     -

filer1% ifconfig bge1
bge1: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
=20=20=20=20=20=20=20
options=3Dc009b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,VLAN_HWTS=
O,LINKSTATE>
        ether xx:xx:xx:xx:xx:xx
        inet 10.20.30.31 netmask 0xffffff00 broadcast 10.20.30.255=20
        nd6 options=3D29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
        media: Ethernet autoselect (1000baseT <full-duplex,master>)
        status: active

(I'll let you know if the problem occurs again)

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