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[TCP]: Avoid clearing sacktag hint in trivial situations
authorIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Thu, 20 Sep 2007 18:37:19 +0000 (11:37 -0700)
committerDavid S. Miller <davem@sunset.davemloft.net>
Wed, 10 Oct 2007 23:52:12 +0000 (16:52 -0700)
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>

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