talos-obmc-linux/include/linux/sunrpc/xprt.h, branch v5.0

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

SUNRPC: Treat the task and request as separate in the xprt_ops->send_request()

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

When we shift to using the transmit queue, then the task that holds the write lock will not necessarily be the same as the one being transmitted. Signed-off-by: Trond Myklebust

SUNRPC: Refactor RPC call encoding

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

Move the call encoding so that it occurs before the transport connection etc. Signed-off-by: Trond Myklebust