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

[Bart Van Assche]

On Wed, Sep 2, 2009 at 9:53 PM, Chris Worley<worleys at gmail.com> wrote:
> On Wed, Sep 2, 2009 at 1:31 PM, Bart Van Assche<bart.vanassche at gmail.com> wrote:
>> On Tue, Sep 1, 2009 at 1:04 AM, Chris Worley<worleys at gmail.com> wrote:
>>> [ ... ]
>>> I've found a good kernel/scst mix to easily repeat this; I can get it
>>> to repeatedly hang w/ 8K block transfers running Ubuntu 9.04 w/ the
>>> 2.6.27-14-server kernel on _both_ target and initiator (i.e. no WinOF
>>> or OFED at all) and SCST rev 1062 on the target using one drive
>>> (performance is >600MB/s, >80K IOPS, on the 8KB block sizes being
>>> used).
>>> [ ... ]
>>
>> Is there a special reason why you are using the 2.6.27-14-server
>> kernel ? AFAIK the latest Ubuntu 9.04 kernel is 2.6.28-15-server.
>
> No special reason other than it didn't get upgraded w/ the rest of the
> distro... started w/ 8.10.
>
> Do you think that kernel is better?

I noticed this while trying to reproduce this issue. I have no opinion
yet about which of these two kernels is better. I'll downgrade the
Ubuntu kernel in my setup.

Bart.