As David Laight noticed, it currently takes quite some time to find the optimal pmtu in the Search state, and also lacks the black hole detection in the Search Complete state. This patchset is to address them to mke the PLPMTUD probe more effective and efficient. v1->v2: - see Patch 1/2. Xin Long (2): sctp: do black hole detection in search complete state sctp: send the next probe immediately once the last one is acked Documentation/networking/ip-sysctl.rst | 12 ++++++++---- include/net/sctp/structs.h | 3 ++- net/sctp/sm_statefuns.c | 5 ++++- net/sctp/transport.c | 16 ++++++++-------- 4 files changed, 22 insertions(+), 14 deletions(-) -- 2.27.0