On 4/24/2014 2:30 AM, Devesh Sharma wrote:
Hi Chuck
Following is the complete call trace of a typical NFS-RDMA transaction while
mounting a share.
It is unavoidable to stop calling post-send in case it is not created.
Therefore, applying checks to the connection state is a must
While registering/deregistering frmrs on-the-fly. The unconnected state of QP
implies don't call post_send/post_recv from any context.
Long thread... didn't follow it all.
If I understand correctly this race comes only for *cleanup* (LINV) of
FRMR registration while teardown flow destroyed the QP.
I think this might be disappear if for each registration you post LINV+FRMR.
This is assuming that a situation where trying to post Fastreg on a
"bad" QP can
never happen (usually since teardown flow typically suspends outgoing
commands).
Sagi.
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