BMC/Intel-BMC/linux.git/include/linux/sunrpc/xprt.h, branch dev-5.2

SUNRPC: Refactor xprt_request_wait_receive()

2019-04-25T18:18:12+00:00

Convert the transport callback to actually put the request to sleep instead of just setting a timeout. This is in preparation for rpc_sleep_on_timeout(). Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker

SUNRPC: Remove rpc_xprt::tsh_size

2019-02-13T18:14:35+00:00

tsh_size was added to accommodate transports that send a pre-amble before each RPC message. However, this assumes the pre-amble is fixed in size, which isn't true for some transports. That makes tsh_size not very generic. Also I'd like to make the estimation of RPC send and receive buffer sizes more precise. tsh_size doesn't currently appear to be accounted for at all by call_allocate. Therefore let's just remove the tsh_size concept, and make the only transports that have a non-zero tsh_size employ a direct approach. Signed-off-by: Chuck Lever Signed-off-by: Anna Schumaker

sunrpc: remove unused bc_up operation from rpc_xprt_ops

2018-12-28T02:01:41+00:00

Signed-off-by: Vasily Averin Signed-off-by: J. Bruce Fields

SUNRPC: Add a bvec array to struct xdr_buf for use with iovec_iter()

2018-09-30T19:35:16+00:00

Add a bvec array to struct xdr_buf, and have the client allocate it when we need to receive data into pages. Signed-off-by: Trond Myklebust

SUNRPC: Convert xprt receive queue to use an rbtree

2018-09-30T19:35:16+00:00

If the server is slow, we can find ourselves with quite a lot of entries on the receive queue. Converting the search from an O(n) to O(log(n)) can make a significant difference, particularly since we have to hold a number of locks while searching. Signed-off-by: Trond Myklebust

SUNRPC: Cleanup: remove the unused 'task' argument from the request_send()

2018-09-30T19:35:16+00:00

Signed-off-by: Trond Myklebust

SUNRPC: Clean up transport write space handling

2018-09-30T19:35:15+00:00

Treat socket write space handling in the same way we now treat transport congestion: by denying the XPRT_LOCK until the transport signals that it has free buffer space. Signed-off-by: Trond Myklebust

SUNRPC: Turn off throttling of RPC slots for TCP sockets

2018-09-30T19:35:15+00:00

The theory was that we would need to grab the socket lock anyway, so we might as well use it to gate the allocation of RPC slots for a TCP socket. Signed-off-by: Trond Myklebust

SUNRPC: Support for congestion control when queuing is enabled

2018-09-30T19:35:15+00:00

Both RDMA and UDP transports require the request to get a "congestion control" credit before they can be transmitted. Right now, this is done when the request locks the socket. We'd like it to happen when a request attempts to be transmitted for the first time. In order to support retransmission of requests that already hold such credits, we also want to ensure that they get queued first, so that we don't deadlock with requests that have yet to obtain a credit. Signed-off-by: Trond Myklebust

SUNRPC: Improve latency for interactive tasks

2018-09-30T19:35:15+00:00

One of the intentions with the priority queues was to ensure that no single process can hog the transport. The field task->tk_owner therefore identifies the RPC call's origin, and is intended to allow the RPC layer to organise queues for fairness. This commit therefore modifies the transmit queue to group requests by task->tk_owner, and ensures that we round robin among those groups. Signed-off-by: Trond Myklebust