Sean Hefty wrote:
I have the following issue: The IB driver can't be unloaded after
running
applications over RDS.
Yes, HCA driver and there are active connections when the driver is
unloaded.
At least from looking at the code, it looks like unloading the device
driver with connections on the passive side should hang. I'm updating
my test code to verify that this is the case, but can you confirm that
this problem is easily reproducible using RDS?
Yes, it is easily reproducible:
I have 2 servers with MT25418 HCAs (mlx4) connected to the IB switch.
Driver removal hangs on one of them every time if RDS connection was active
(run rds-stress test, for example, to create the connection).
- Vladimir
I'm guessing that most of my device removal testing was always done from
the active side, and none of the mainline kernel ULPs call
rdma_listen(). I'm hoping this would explain why this bug has gone
undetected for this long.
- Sean
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