On 8/22/23 03:18, Shinichiro Kawasaki wrote:
CC+: Bart,
On Aug 21, 2023 / 20:46, Bob Pearson wrote:
[...]
Shinichiro,
Hello Bob, thanks for the response.
I have been aware for a long time that there is a problem with blktests/srp. I see hangs in
002 and 011 fairly often.
I repeated the test case srp/011, and observed it hangs. This hang at srp/011
also can be recreated in stable manner. I reverted the commit 9b4b7c1f9f54
then observed the srp/011 hang disappeared. So, I guess these two hangs have
same root cause.
I have not been able to figure out the root cause but suspect that
there is a timing issue in the srp drivers which cannot handle the slowness of the software
RoCE implemtation. If you can give me any clues about what you are seeing I am happy to help
try to figure this out.
Thanks for sharing your thoughts. I myself do not have srp driver knowledge, and
not sure what clue I should provide. If you have any idea of the action I can
take, please let me know.
Hi Shinichiro and Bob,
When I initially developed the SRP tests these were working reliably in
combination with the rdma_rxe driver. Since 2017 I frequently see issues when
running the SRP tests on top of the rdma_rxe driver, issues that I do not see
if I run the SRP tests on top of the soft-iWARP driver (siw). How about
changing the default for the SRP tests from rdma_rxe to siw and to let the
RDMA community resolve the rdma_rxe issues?
Thanks,
Bart.
