[Bug 193802] tso seems broken on RELENG10 for version 7.4.2 of em driver

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=193802

Karli.Sjoberg at slu.se changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |Karli.Sjoberg at slu.se

--- Comment #2 from Karli.Sjoberg at slu.se ---
Same here, on a Supermicro X9SRL-F. It would seem for us that iSCSI is more
affected by this than NFS is:

Feb 23 12:18:20 <fileserver> kernel: WARNING: <ipaddress> (<iqn>): no ping
reply (NOP-Out) after 5 seconds; dropping connection
Feb 23 12:18:20 <fileserver> kernel: em1: link state changed to UP
Feb 23 12:18:25 <fileserver> kernel: Feb 23 12:18:25 <fileserver> ctld[9389]:
<ipaddress>: read: connection lost
Feb 23 13:26:55 <fileserver> kernel: WARNING: <ipaddress> (<iqn>): no ping
reply (NOP-Out) after 5 seconds; dropping connection
Feb 23 13:26:56 <fileserver> kernel: em0: link state changed to UP
Feb 23 13:26:56 <fileserver> kernel: WARNING: <ipaddress> (<iqn>): no ping
reply (NOP-Out) after 5 seconds; dropping connection
Feb 23 13:26:59 <fileserver> kernel: WARNING: <ipaddress> (<iqn>): connection
error; dropping connection
Feb 23 14:46:23 <fileserver> kernel: WARNING: <ipaddress> (<iqn>): no ping
reply (NOP-Out) after 5 seconds; dropping connection
Feb 23 14:46:23 <fileserver> kernel: em1: link state changed to UP
Feb 23 14:46:24 <fileserver> kernel: WARNING: <ipaddress> (<iqn>): no ping
reply (NOP-Out) after 5 seconds; dropping connection
Feb 23 14:46:30 <fileserver> kernel: Feb 23 14:46:30 <fileserver> ctld[36377]:
<ipaddress>: read: connection lost
Feb 23 15:13:40 <fileserver> kernel: em0: link state changed to UP
Feb 23 15:13:40 <fileserver> kernel: WARNING: <ipaddress> (<iqn>): no ping
reply (NOP-Out) after 5 seconds; dropping connection
Feb 23 15:20:31 <fileserver> kernel: WARNING: <ipaddress> (<iqn>): no ping
reply (NOP-Out) after 5 seconds; dropping connection
Feb 23 15:20:31 <fileserver> kernel: em1: link state changed to UP
Feb 23 15:20:31 <fileserver> kernel: WARNING: <ipaddress> (<iqn>): no ping
reply (NOP-Out) after 5 seconds; dropping connection

Feb 22 03:01:36 <fileserver> kernel: em0: Watchdog timeout -- resetting
Feb 22 03:01:36 <fileserver> kernel: em0: Queue(0) tdh = 669, hw tdt = 623
Feb 22 03:01:36 <fileserver> kernel: em0: TX(0) desc avail = 32,Next TX to
Clean = 655

# pciconf -lvcb em0
em0 at pci0:9:0:0: class=0x020000 card=0x000015d9 chip=0x10d38086 rev=0x00
hdr=0x00
    vendor     = 'Intel Corporation'
    device     = '82574L Gigabit Network Connection'
    class      = network
    subclass   = ethernet
    bar   [10] = type Memory, range 32, base 0xfbe00000, size 131072, enabled
    bar   [18] = type I/O Port, range 32, base 0xa000, size 32, enabled
    bar   [1c] = type Memory, range 32, base 0xfbe20000, size 16384, enabled
    cap 01[c8] = powerspec 2  supports D0 D3  current D0
    cap 05[d0] = MSI supports 1 message, 64 bit 
    cap 10[e0] = PCI-Express 1 endpoint max data 128(256) link x1(x1)
                 speed 2.5(2.5) ASPM disabled(L0s/L1)
    cap 11[a0] = MSI-X supports 5 messages, enabled
                 Table in map 0x1c[0x0], PBA in map 0x1c[0x2000]
    ecap 0001[100] = AER 1 0 fatal 0 non-fatal 0 corrected
    ecap 0003[140] = Serial 1 0cc47affff0cc034

FreeBSD 10.1-STABLE #0 r278568M

Disabling TSO seems to have stabilized it, for now.

/K

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