RDMA/rtrs-clt: Write path fast memory registration

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With fast memory registration in write path, we can reduce
the memory consumption by using less max_send_sge, support IO bigger
than 116 KB (29 segments * 4 KB) without splitting, and it also
make the IO path more symmetric.

To avoid some times MR reg failed, waiting for the invalidation to finish
before the new mr reg. Introduce a refcount, only finish the request
when both local invalidation and io reply are there.

Link: https://lore.kernel.org/r/20210621055340.11789-3-jinpu.wang@ionos.com
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Md Haris Iqbal <haris.iqbal@ionos.com>
Signed-off-by: Dima Stepanov <dmitrii.stepanov@ionos.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

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Jack Wang 2021-06-21 07:53:37 +02:00 • committed by Jason Gunthorpe

parent 630e438f04

commit 2ece9ec62e

2 changed files with 74 additions and 27 deletions

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100

drivers/infiniband/ulp/rtrs/rtrs-clt.c

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1

drivers/infiniband/ulp/rtrs/rtrs-clt.h

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