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

[Chris Worley]

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.

Chris
>
> Bart.
>