Socket request has iov vector of limited size and when
DIF insert of strip feature is enabled we send each data
block as separate iov element to remove metadata.
In the case of large read operation there might be not
enough iov elements to describe all data block. In this
case we can send several C2H PDUs.
To estimate the number of bytes that can be written
with single C2H we try to fill socket iovs. That is
not so cheap operation so this fix is implemented
for DIF case only. Also data buffers in regular
read operation should always fit into socket iov
vector.
Fixes issue #1674
Change-Id: Ie7197f96175ecc0a760d91d35b668512432ef7a7
Signed-off-by: Alexey Marchuk <alexeymar@mellanox.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/5968
Community-CI: Broadcom CI
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Ziye Yang <ziye.yang@intel.com>
3e5ea7ff33