This test was done on an OEL5.6 system, using the latest released RHEL kernel + 
872 code.

Mike, we just discovered that our Cisco switch didn't have FlowControl enabled 
properly.  It looks like it _should_ have autonegotiated to on, but may not 
have.  We've manually forced it on and are running another test at the moment.  
I don't want to eat up too much of your time, so let me gather the new set of 
info from a new test fist.  Then I'll attach the full logs.

Thanks,
Joe



On Apr 14, 2011, at 3:10 PM, Mike Christie wrote:

> On 04/14/2011 06:39 AM, Joe Hoot wrote:
>> Here's what I am seeing (roughly... with lines scraped in between.. and I'm 
>> only grepping for connect7/session7):
>> 
>> Apr 11 13:22:24 oim61024009 kernel:  connection7:0: iscsi_tcp_segment_done 
>> copied 2592 0 size 4096 xmit
>> ...lots of the above types of messages...
>> Apr 11 13:22:24 oim61024009 kernel:  connection7:0: iscsi_tcp_segment_done 
>> copied 2592 0 size 4096 xmit
>> Apr 11 13:22:24 oim61024009 kernel:  connection7:0: 
>> iscsi_check_transport_timeouts Setting next tmo 2279563
>> Apr 11 13:22:24 oim61024009 kernel:  connection7:0: iscsi_tcp_segment_done 
>> copied 2592 0 size 4096 xmit
>> ...lots of the above types of messages...
>> Apr 11 13:22:24 oim61024009 kernel:  connection7:0: iscsi_tcp_segment_done 
>> copied 2592 0 size 4096 xmit
>> Apr 11 13:22:24 oim61024009 kernel:  connection7:0: 
>> iscsi_check_transport_timeouts Setting next tmo 2279563
>> Apr 11 13:22:24 oim61024009 kernel:  connection7:0: iscsi_tcp_segment_done 
>> copied 2592 0 size 4096 xmit
>> ...lots of the above types of messages...
>> Apr 11 13:22:25 oim61024009 kernel:  connection7:0: iscsi_tcp_segment_done 
>> copied 2592 0 size 4096 xmit
>> Apr 11 13:22:25 oim61024009 kernel:  connection7:0: 
>> iscsi_check_transport_timeouts Sending nopout as ping
>> Apr 11 13:22:25 oim61024009 kernel:  connection7:0: 
>> iscsi_check_transport_timeouts Setting next tmo 2280813
>> Apr 11 13:22:25 oim61024009 kernel:  connection7:0: iscsi_tcp_segment_done 
>> copied 2592 0 size 4096 xmit
>> ...lots of the above types of messages...
>> Apr 11 13:22:30 oim61024009 kernel:  connection7:0: iscsi_tcp_segment_done 
>> copied 2592 0 size 4096 xmit
> 
> Does it always say "xmit" in the iscsi_tcp_segment_done messages from 
> 13:22:20 - 13:22:30 or does it sometimes say "recv"? Just send the full 
> logs actually.
> 
> And are you running with that kernel fix (I think oracle merged if for 
> you right). This fix:
> http://git.kernel.org/?p=linux/kernel/git/jejb/scsi-misc-2.6.git;a=commitdiff;h=4c48a82935f833d94fcf44c2b0c5d2922acfc77a;hp=d1acfae514425d680912907c6554852f1e258551
> 
> 
> If there is no "recv"s in there then you need the attached patch. No 
> idea if this applies to the oracle kernel you are using.
> 
> The weird thing though would be that it means for 10 seconds we just 
> send data and never get a response to any of the pdus we have sent.
> 
> What is the output of iscsiadm -m session -P 2 when you are logged into 
> the target?
> 
>> Apr 11 13:22:30 oim61024009 kernel:  connection7:0: ping timeout of 5 secs 
>> expired, recv timeout 5, last rx 2278313, last ping 2279563, now 2280813
> 
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> <acct-for-all-traffic.patch>

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