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svcrdma: Reduce max_send_sges
There's no need to request a large number of send SGEs because the inline threshold already constrains the number of SGEs per Send. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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@ -475,10 +475,12 @@ static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt)
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/* Qualify the transport resource defaults with the
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* capabilities of this particular device */
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newxprt->sc_max_send_sges = dev->attrs.max_send_sge;
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/* transport hdr, head iovec, one page list entry, tail iovec */
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if (newxprt->sc_max_send_sges < 4) {
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pr_err("svcrdma: too few Send SGEs available (%d)\n",
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/* Transport header, head iovec, tail iovec */
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newxprt->sc_max_send_sges = 3;
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/* Add one SGE per page list entry */
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newxprt->sc_max_send_sges += svcrdma_max_req_size / PAGE_SIZE;
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if (newxprt->sc_max_send_sges > dev->attrs.max_send_sge) {
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pr_err("svcrdma: too few Send SGEs available (%d needed)\n",
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newxprt->sc_max_send_sges);
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goto errout;
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}
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