[stgt] help tgt segfault

[Tomasz Chmielewski]

FUJITA Tomonori schrieb:

>>> No more I/O errors from open-iscsi side as well.
>> I'm running a bit different "test" now and I'm getting host resets on 
>> open-iscsi side every few minutes:
>>
>>   connection3:0: iscsi: detected conn error (1011)
>> iscsi: host reset succeeded
>>
>>
>> The "test" is using DRBD over a slow link.
>> In such case (background synchronization running over a slow link), for 
>> tgtd, DRBD device for look like one that returns reads fast (say, 50 
>> MB/s), but any write, even small, can potentially wait several seconds 
>> to complete (with average speed of about 200 kB/s and long delays).
>>
>> How can I check what causes these resets?
> 
> Have you already checked the tcpdump log?

Not yet - I was transferring several gigabytes, I wouldn't like to have 
tcpdump logs of this size...

Other way to reproduce it is establishing a link with a slow speed 
between the target and the initiator (i.e., "--shaper 50000" option to 
openvpn), and reading/writing data.
You will see device resets, and eventually, I/O errors on the initiator; 
with no errors on the target.

Anyway, it is something with open-iscsi, as it's reproducible with IET 
as well, so I'll ask at open-iscsi list.


-- 
Tomasz Chmielewski
http://wpkg.org
--
To unsubscribe from this list: send the line "unsubscribe stgt" in
the body of a message to majordomo at vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html