xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

IB/rdmavt: Handle dereg of inuse MRs properly

Browse Source 
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>
This commit is contained in:
Mike Marciniszyn
2017-08-28 11:24:10 -07:00
committed by Doug Ledford
parent 557fafe1bf
commit 0208da90de
4 changed files with 216 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
include/rdma/rdmavt_qp.h
View File

@@ -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 */