| commit | f577111302677e6d1448475821cc19ba8835f60e | |
| author | Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> | |
| Fri, 16 Nov 2007 03:35:11 +0000 (15 19:35 -0800) | ||
| committer | David S. Miller <davem@davemloft.net> | |
| Mon, 28 Jan 2008 22:54:02 +0000 (28 14:54 -0800) | ||
| tree | 4c5f5f0081bb0843a589fcae86ec6dc13dee3526 | treesnapshot (tar.gz zip) |
| parent | b9d86585dc6c9265aa373c7036458fe8aa7627c6 | commitdiff |
[TCP]: Extend reordering detection to cover CA_Loss partially
This implements more accurately what is stated in sacktag's
overall comment:
"Both of these heuristics are not used in Loss state, when
we cannot account for retransmits accurately."
When CA_Loss state is entered, the state changer ensures that
undo_marker is only set if no TCPCB_RETRANS skbs were found,
thus having non-zero undo_marker in CA_Loss basically tells
that the R-bits still accurately reflect the current state
of TCP.
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
This implements more accurately what is stated in sacktag's
overall comment:
"Both of these heuristics are not used in Loss state, when
we cannot account for retransmits accurately."
When CA_Loss state is entered, the state changer ensures that
undo_marker is only set if no TCPCB_RETRANS skbs were found,
thus having non-zero undo_marker in CA_Loss basically tells
that the R-bits still accurately reflect the current state
of TCP.
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
| net/ipv4/tcp_input.c | diffblobblamehistory |