[Scst-devel] [ofa-general] WinOF_2_0_5/SRP initiator: slow reads and eventually hangs

[Chris Worley]

On Sun, Sep 6, 2009 at 3:36 PM, Chris Worley<worleys at gmail.com> wrote:
> On Sun, Sep 6, 2009 at 3:17 PM, Bart Van Assche<bart.vanassche at gmail.com> wrote:
>> On Fri, Sep 4, 2009 at 1:20 AM, Chris Worley <worleys at gmail.com> wrote:
>>> On Thu, Sep 3, 2009 at 11:38 AM, Chris Worley<worleys at gmail.com> wrote:
>>> > I've used a couple of initiators (different systems) w/ different
>>> > OSes, w/ different IB cards (all QDR) and different IB stacks
>>> > (built-in vs. OFED) and can repeat the problem in all but the
>>> > RHEL5.2/OFED 1.4.1 target and initiator (but, if the initiator is
>>> > WinOF and the target is RHEL5.2/OFED1.4.1, then the problem does
>>> > repeat).
>>>
>>> Here's a twist: I used the Ubuntu initiator w/ one of the RHEL
>>> targets, and the RHEL initiator (same machine as was running WinOF
>>> from the beginning of this thread) w/ one of the Ubuntu targets: in
>>> both cases, the problem does not repeat.
>>>
>>> That makes it sound like OFED is the cure on either side of the
>>> connection, but does not explain the issue w/ WinOF (which does fail
>>> w/ either Ununtu or RHEL targets).
>>
>> These results are strange. Regarding the Linux-only tests, I was
>> assuming failure of a single component (Ubuntu SRP initiator, OFED SRP
>> initiator, Ubuntu IB driver, OFED IB driver or SRP target), but for
>> each of these components there is at least one test that passes and at
>> least one test that fails. So either my assumption is wrong or one of
>> the above test results is not repeatable. Do you have the time to
>> repeat the Linux-only tests ?
>
> Last night I was rerunning the RHEL5.2 initiator w/ Ubuntu client, and
> the problem repeated; now, I can't repeat the case where it didn't
> fail.  Still, no errors, other than the eventual timeouts previously
> shown; the target thinks all is fine, the initiator is stuck.

... and I haven't had any success w/ Ubuntu target and initiator, 8.10 or 9.04.

Chris
>
> Chris
>>
>> Bart.
>>
>