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| author | Vlad Yasevich <vladislav.yasevich@hp.com> | 2007-08-24 19:37:46 +0900 |
|---|---|---|
| committer | Vlad Yasevich <vladislav.yasevich@hp.com> | 2007-08-30 13:56:06 -0400 |
| commit | d0ce92910bc04e107b2f3f2048f07e94f570035d (patch) | |
| tree | 9c207786faf64e210d4e3e9c0a2388a0576b4cf8 /net/sctp | |
| parent | cc75689a4c4eb94b2fd7e3870347b9237ab39503 (diff) | |
| download | lwn-d0ce92910bc04e107b2f3f2048f07e94f570035d.tar.gz lwn-d0ce92910bc04e107b2f3f2048f07e94f570035d.zip | |
SCTP: Do not retransmit chunks that are newer then rtt.
When performing a retransmit, do not include the chunk if
it was sent less then 1 rtt ago. The reason is that we
may receive the SACK very soon and wouldn't retransmit.
Suggested by Randy Stewart.
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Diffstat (limited to 'net/sctp')
| -rw-r--r-- | net/sctp/outqueue.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/net/sctp/outqueue.c b/net/sctp/outqueue.c index 992f361084b7..28f4fe77ceee 100644 --- a/net/sctp/outqueue.c +++ b/net/sctp/outqueue.c @@ -421,6 +421,13 @@ void sctp_retransmit_mark(struct sctp_outq *q, */ if ((fast_retransmit && (chunk->fast_retransmit > 0)) || (!fast_retransmit && !chunk->tsn_gap_acked)) { + /* If this chunk was sent less then 1 rto ago, do not + * retransmit this chunk, but give the peer time + * to acknowlege it. + */ + if ((jiffies - chunk->sent_at) < transport->rto) + continue; + /* RFC 2960 6.2.1 Processing a Received SACK * * C) Any time a DATA chunk is marked for |