From: Eric Dumazet <eduma...@google.com> Jakub and Neil reported an increase of RTO timers whenever TX completions are delayed a bit more (by increasing NIC TX coalescing parameters)
While problems have been there forever, second patch might introduce some regressions so I prefer not backport them to stable releases before things settle. Many thanks to FB team for their help and tests. Few packetdrill tests need to be changed to reflect the improvements brought by this series. Eric Dumazet (3): tcp: plug skb_still_in_host_queue() to TSQ tcp: consider using standard rtx logic in tcp_rcv_fastopen_synack() tcp: remove obsolete check in __tcp_retransmit_skb() include/linux/skbuff.h | 2 +- net/ipv4/tcp_input.c | 10 ++++------ net/ipv4/tcp_output.c | 20 ++++++++------------ 3 files changed, 13 insertions(+), 19 deletions(-) -- 2.31.0.rc2.261.g7f71774620-goog