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| author | Chuck Lever <chuck.lever@oracle.com> | 2018-10-01 14:25:20 -0400 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2018-10-02 15:46:35 -0400 |
| commit | c421ece68f6952d4cc48ee81ebfc61ef0b83ad3b (patch) | |
| tree | a49b769da04cd15ee23a2dd381acc9cea1698465 /net/sunrpc/xprtrdma/fmr_ops.c | |
| parent | ef739b2175dde9c05594f768cb78149f1ce2ac36 (diff) | |
| download | linux-c421ece68f6952d4cc48ee81ebfc61ef0b83ad3b.tar.bz2 | |
xprtrdma: Create more MRs at a time
Some devices require more than 3 MRs to build a single 1MB I/O.
Ensure that rpcrdma_mrs_create() will add enough MRs to build that
I/O.
In a subsequent patch I'm changing the MR recovery logic to just
toss out the MRs. In that case it's possible for ->send_request to
loop acquiring some MRs, not getting enough, getting called again,
recycling the previous MRs, then not getting enough, lather rinse
repeat. Thus first we need to ensure enough MRs are created to
prevent that loop.
I'm "reusing" ia->ri_max_segs. All of its accessors seem to want the
maximum number of data segments plus two, so I'm going to bake that
into the initial calculation.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net/sunrpc/xprtrdma/fmr_ops.c')
| -rw-r--r-- | net/sunrpc/xprtrdma/fmr_ops.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/sunrpc/xprtrdma/fmr_ops.c b/net/sunrpc/xprtrdma/fmr_ops.c index 0f7c465d9a5a..db589a23682b 100644 --- a/net/sunrpc/xprtrdma/fmr_ops.c +++ b/net/sunrpc/xprtrdma/fmr_ops.c @@ -187,6 +187,7 @@ fmr_op_open(struct rpcrdma_ia *ia, struct rpcrdma_ep *ep, ia->ri_max_segs = max_t(unsigned int, 1, RPCRDMA_MAX_DATA_SEGS / RPCRDMA_MAX_FMR_SGES); + ia->ri_max_segs += 2; /* segments for head and tail buffers */ return 0; } |