[PATCH 0/3] nvme-tcp: fixup I/O stall on congested sockets

[Hannes Reinecke]

Hi all,

I have been chasing keep-alive timeouts with TLS enabled in the last few
days (weeks, even :-( ). On larger setups (eg with 32 queues) the connection
never got established properly as I've been hitting keep-alive timeouts before
the last queue got connected.
Turns out that occasionally we simply do not send the keep-alive request; it's
been added to the request list but the io_work workqueue function is never
restarted as it bails out after nvme_tcp_try_recv() returns -EAGAIN.
During debugging I also found that we're quite lazy with the list
handling of requests, so I've added two preliminary patches to ensure
that all list elements are properly terminated.

As usual, comments and reviews are welcome.

Hannes Reinecke (3):
  nvme-tcp: avoid inline sending when handling R2T PDUs
  nvme-tcp: sanitize request list handling
  nvme-tcp: fix I/O stalls on congested sockets

 drivers/nvme/host/tcp.c | 26 ++++++++++++++++++++------
 1 file changed, 20 insertions(+), 6 deletions(-)

-- 
2.35.3