Josef Bacik 9561a7ade0
nbd: add multi-connection support ...
NBD can become contended on its single connection. We have to serialize all
writes and we can only process one read response at a time. Fix this by
allowing userspace to provide multiple connections to a single nbd device. This
coupled with block-mq drastically increases performance in multi-process cases.
Thanks,
Signed-off-by: Josef Bacik <jbacik@fb.com >
Signed-off-by: Jens Axboe <axboe@fb.com >
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