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author | Xin Long <lucien.xin@gmail.com> | 2021-07-25 20:42:51 +0300 |
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committer | David S. Miller <davem@davemloft.net> | 2021-07-26 01:06:02 +0300 |
commit | eacf078cf4c7aa23e9591738511f142cc39b5186 (patch) | |
tree | 0004a2401d2477cc7176caef1efa159af62df47f /kernel/hung_task.c | |
parent | 058e6e0ed0eace43401c945082dec1d669b5b231 (diff) | |
download | linux-eacf078cf4c7aa23e9591738511f142cc39b5186.tar.xz |
sctp: send pmtu probe only if packet loss in Search Complete state
This patch is to introduce last_rtx_chunks into sctp_transport to detect
if there's any packet retransmission/loss happened by checking against
asoc's rtx_data_chunks in sctp_transport_pl_send().
If there is, namely, transport->last_rtx_chunks != asoc->rtx_data_chunks,
the pmtu probe will be sent out. Otherwise, increment the pl.raise_count
and return when it's in Search Complete state.
With this patch, if in Search Complete state, which is a long period, it
doesn't need to keep probing the current pmtu unless there's data packet
loss. This will save quite some traffic.
v1->v2:
- add the missing Fixes tag.
Fixes: 0dac127c0557 ("sctp: do black hole detection in search complete state")
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel/hung_task.c')
0 files changed, 0 insertions, 0 deletions