tree 475050b8e41eb317144465b1e2b9255fbad188b4
parent c96fd3d461fa495400df24be3b3b66f0e0b152f9
author Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> 1190313439 -0700
committer David S. Miller <davem@sunset.davemloft.net> 1192060332 -0700

[TCP]: Avoid clearing sacktag hint in trivial situations

There's no reason to clear the sacktag skb hint when small part
of the rexmit queue changes. Account changes (if any) instead when
fragmenting/collapsing. RTO/FRTO do not touch SACKED_ACKED bits so
no need to discard SACK tag hint at all.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>