Re: [PATCH 10/10] IB: remove the unused usecnt field from struct ib_mr

[Or Gerlitz]

On 12/18/2015 3:55 PM, Christoph Hellwig wrote:

diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h

index 284916d..e45776e 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -1306,7 +1306,6 @@ struct ib_mr {
        u64                iova;
        u32                length;
        unsigned int       page_size;
-       atomic_t           usecnt; /* count number of MWs */
  };

This comment is part of Roland's uverbs commit.

I wonder if LL driver supporting the  IB_WR_BIND_MW op
ref the MR on port send and deref it on completion?

Or.

struct ib_mw {

-- 1.9.1

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