Commits on Jun 22, 2018

1. enable MaxOutstandingR2T negotiation …

   The iscsi_tcp kernel side R2T handling is in libiscsi_tcp and is shared
   with at least cxgbi3, and the drivers claim CAP_MULTI_R2T. But the
   iscsid login parameter negotiation code never enabled MaxOutstandingR2T.
   
   I've tested this against an LIO target, negotiating to 2 and 4 R2Ts.
   The network traces looked good, with the initiator keeping track of
   multiple outstanding R2Ts and using the correct next identifier.
   Throughput of bulk write data was improved, even over low latency virtio
   links.
   
   Signed-off-by: Chris Leech <cleech@redhat.com>

   

   cleech committed Jun 22, 2018
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