On 6/8/2021 1:24 PM, Kamal Heib wrote:
On 5/25/21 7:22 PM, Max Gurtovoy wrote:
On 5/25/2021 6:54 PM, Sagi Grimberg wrote:
Since the Linux iser initiator default max I/O size set to 512KB and
since there is no handshake procedure for this size in iser protocol,
set the default max IO size of the target to 512KB as well.
For changing the default values, there is a module parameter for both
drivers.
Is this solving a bug?
No. Only OOB for some old connect-IB devices.
I think it's reasonable to align initiator and target defaults anyway.
Actually, this patch is solving a bug when trying iser over Connect-IB, We see
the following failure when trying to do discovery:
You can work around this using the ib_isert sg_tablesize module param
and set it to 128.
So it's more OOB behavior than a bug.
Anyway, This is good practice to be able to establish connections also
for old devices without WAs and we also aligning to the sg_table size in
the initiator side.
Jason/Sagi,
can you comment on this patch for 5.14 ?
Server:
[ 124.264648] infiniband mlx5_0: create_qp:2783:(pid 83): Create QP type 2 failed
[ 124.298598] isert: isert_create_qp: rdma_create_qp failed for cma_id -12
[ 124.364768] isert: isert_cma_handler: failed handle connect request -12
[ 128.271609] infiniband mlx5_0: create_qp:2783:(pid 890): Create QP type 2 failed
[ 128.311450] isert: isert_create_qp: rdma_create_qp failed for cma_id -12
[ 128.378995] isert: isert_cma_handler: failed handle connect request -12
[ 130.668362] infiniband mlx5_0: create_qp:2783:(pid 81): Create QP type 2 failed
[ 130.705869] isert: isert_create_qp: rdma_create_qp failed for cma_id -12
[ 130.777306] isert: isert_cma_handler: failed handle connect request -12
[ 132.671161] infiniband mlx5_0: create_qp:2783:(pid 86): Create QP type 2 failed
[ 132.707807] isert: isert_create_qp: rdma_create_qp failed for cma_id -12
[ 132.778867] isert: isert_cma_handler: failed handle connect request -12
[ 132.810653] infiniband mlx5_0: create_qp:2783:(pid 19): Create QP type 2 failed
[ 132.845691] isert: isert_create_qp: rdma_create_qp failed for cma_id -12
[ 132.912706] isert: isert_cma_handler: failed handle connect request -12
[ 134.681936] infiniband mlx5_0: create_qp:2783:(pid 83): Create QP type 2 failed
[ 134.718932] isert: isert_create_qp: rdma_create_qp failed for cma_id -12
[ 134.788804] isert: isert_cma_handler: failed handle connect request -12
[ 136.678428] infiniband mlx5_0: create_qp:2783:(pid 86): Create QP type 2 failed
[ 136.715859] isert: isert_create_qp: rdma_create_qp failed for cma_id -12
[ 136.785058] isert: isert_cma_handler: failed handle connect request -12
[ 136.817414] infiniband mlx5_0: create_qp:2783:(pid 727): Create QP type 2 failed
[ 136.854583] isert: isert_create_qp: rdma_create_qp failed for cma_id -12
[ 136.922975] isert: isert_cma_handler: failed handle connect request -12
Client:
$ iscsiadm -m discovery -t sendtargets -p 172.31.0.6 -I iser
iscsiadm: Connection to discovery portal 172.31.0.6 failed: encountered
connection failure
iscsiadm: Connection to discovery portal 172.31.0.6 failed: encountered
connection failure
iscsiadm: Connection to discovery portal 172.31.0.6 failed: encountered
connection failure
iscsiadm: Connection to discovery portal 172.31.0.6 failed: encountered
connection failure
iscsiadm: Connection to discovery portal 172.31.0.6 failed: encountered
connection failure
iscsiadm: Connection to discovery portal 172.31.0.6 failed: encountered
connection failure
iscsiadm: connection login retries (reopen_max) 5 exceeded
iscsiadm: Could not perform SendTargets discovery: iSCSI PDU timed out
Thanks,
Kamal
