mirror of
https://github.com/torvalds/linux.git
synced 2026-03-08 03:44:45 +01:00
a1f53d5fb6
Instead of just blocking the sender until "c_npaths" is known (it gets updated upon the receipt of a MPRDS PONG message), simply use the first lane (cp_index#0). But just using the first lane isn't enough. As soon as we enqueue messages on a different lane, we'd run the risk of out-of-order delivery of RDS messages. Earlier messages enqueued on "cp_index == 0" could be delivered later than more recent messages enqueued on "cp_index > 0", mostly because of possible head of line blocking issues causing the first lane to be slower. To avoid that, we simply take a snapshot of "cp_next_tx_seq" at the time we're about to fan-out to more lanes. Then we delay the transmission of messages enqueued on other lanes with "cp_index > 0" until cp_index#0 caught up with the delivery of new messages (from "cp_send_queue") as well as in-flight messages (from "cp_retrans") that haven't been acknowledged yet by the receiver. We also add a new counter "mprds_catchup_tx0_retries" to keep track of how many times "rds_send_xmit" had to suspend activities, because it was waiting for the first lane to catch up. Signed-off-by: Gerd Rausch <gerd.rausch@oracle.com> Signed-off-by: Allison Henderson <allison.henderson@oracle.com> Link: https://patch.msgid.link/20260203055723.1085751-8-achender@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org> |
||
|---|---|---|
| .. | ||
| af_rds.c | ||
| bind.c | ||
| cong.c | ||
| connection.c | ||
| ib.c | ||
| ib.h | ||
| ib_cm.c | ||
| ib_frmr.c | ||
| ib_mr.h | ||
| ib_rdma.c | ||
| ib_recv.c | ||
| ib_ring.c | ||
| ib_send.c | ||
| ib_stats.c | ||
| ib_sysctl.c | ||
| info.c | ||
| info.h | ||
| Kconfig | ||
| loop.c | ||
| loop.h | ||
| Makefile | ||
| message.c | ||
| page.c | ||
| rdma.c | ||
| rdma_transport.c | ||
| rdma_transport.h | ||
| rds.h | ||
| rds_single_path.h | ||
| recv.c | ||
| send.c | ||
| stats.c | ||
| sysctl.c | ||
| tcp.c | ||
| tcp.h | ||
| tcp_connect.c | ||
| tcp_listen.c | ||
| tcp_recv.c | ||
| tcp_send.c | ||
| tcp_stats.c | ||
| threads.c | ||
| transport.c | ||