tcp: convert retransmit_cnt_hint to seqno

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Main benefit in this is that we can then freely point
the retransmit_skb_hint to anywhere we want to because
there's no longer need to know what would be the count
changes involve, and since this is really used only as a
terminator, unnecessary work is one time walk at most,
and if some retransmissions are necessary after that
point later on, the walk is not full waste of time
anyway.

Since retransmit_high must be kept valid, all lost
markers must ensure that.

Now I also have learned how those "holes" in the
rexmittable skbs can appear, mtu probe does them. So
I removed the misleading comment as well.

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

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This commit is contained in:

Ilpo Järvinen 2008-09-20 21:20:20 -07:00 • committed by David S. Miller

parent 41ea36e35a

commit 006f582c73

4 changed files with 30 additions and 33 deletions

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2

include/linux/tcp.h

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2

include/net/tcp.h

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34

net/ipv4/tcp_input.c

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25

net/ipv4/tcp_output.c

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