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authorVlad Yasevich <vladislav.yasevich@hp.com>2007-02-21 02:06:04 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2007-02-26 11:42:49 -0800
commit8c4a2d41a7eb5a8f214f537acca533dcd6430782 (patch)
tree48081d53d976bcb69da509c63d5bfb733a27446a /arch/arm/mach-versatile
parent2c4f6219aca5939b57596278ea8b014275d4917b (diff)
[SCTP]: Fix connection hang/slowdown with PR-SCTP
The problem that this patch corrects happens when all of the following conditions are satisfisfied: 1. PR-SCTP is used and the timeout on the chunks is set below RTO.Max. 2. One of the paths on a multihomed associations is brought down. In this scenario, data will expire within the rto of the initial transmission and will never be retransmitted. However this data still fills the send buffer and is counted against the association as outstanding data. This causes any new data not to be sent and retransmission to not happen. The fix is to discount the abandoned data from the outstanding count and peers rwnd estimation. This allows new data to be sent and a retransmission timer restarted. Even though this new data will most likely expire within the rto, the timer still counts as a strike against the transport and forces the FORWARD-TSN chunk to be retransmitted as well. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: Sridhar Samudrala <sri@us.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/arm/mach-versatile')
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