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| author |   Mike Marciniszyn <mike.marciniszyn@intel.com> | 2017-08-28 11:24:10 -0700 |
|---|---|---|
| committer |   Doug Ledford <dledford@redhat.com> | 2017-08-28 19:12:31 -0400 |
| commit | 0208da90def5776cef940f9de4ffe6ecef346207 (patch) | |
| tree | 05833a7dffa3de7e1eea51a004871ae9780e40d5 /include/rdma/rdmavt_qp.h | |
| parent | IB/qib: Convert qp_stats debugfs interface to use new iterator API (diff) | |
| download | linux-dev-0208da90def5776cef940f9de4ffe6ecef346207.tar.xz linux-dev-0208da90def5776cef940f9de4ffe6ecef346207.zip | |
IB/rdmavt: Handle dereg of inuse MRs properly
A destroy of an MR prior to destroying the QP can cause the following
diagnostic if the QP is referencing the MR being de-registered:
hfi1 0000:05:00.0: hfi1_0: rvt_dereg_mr timeout mr ffff8808562108
00 pd ffff880859b20b00
The solution is to when the a non-zero refcount is encountered when
the MR is destroyed the QPs needs to be iterated looking for QPs in
the same PD as the MR. If rvt_qp_mr_clean() detects any such QP
references the rkey/lkey, the QP needs to be put into an error state
via a call to rvt_qp_error() which will trigger the clean up of any
stuck references.
This solution is as specified in IBTA 1.3 Volume 1 11.2.10.5.
[This is reproduced with the 0.4.9 version of qperf and the rc_bw test]
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'include/rdma/rdmavt_qp.h')
| -rw-r--r-- | include/rdma/rdmavt_qp.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/rdma/rdmavt_qp.h b/include/rdma/rdmavt_qp.h index dfeb311c30a1..0eed3d8752fa 100644 --- a/include/rdma/rdmavt_qp.h +++ b/include/rdma/rdmavt_qp.h @@ -702,4 +702,5 @@ int rvt_qp_iter_next(struct rvt_qp_iter *iter); void rvt_qp_iter(struct rvt_dev_info *rdi, u64 v, void (*cb)(struct rvt_qp *qp, u64 v)); +void rvt_qp_mr_clean(struct rvt_qp *qp, u32 lkey); #endif /* DEF_RDMAVT_INCQP_H */ |