]> pilppa.com Git - linux-2.6-omap-h63xx.git/commit
[TCP] FRTO: Add missing ECN CWR sending to one of the responses
authorIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Sat, 19 May 2007 20:56:23 +0000 (13:56 -0700)
committerDavid S. Miller <davem@davemloft.net>
Sat, 19 May 2007 20:56:23 +0000 (13:56 -0700)
commit463236557db4b5d4de9eb3fafa2e7d7905ac65ab
tree70c31be3870865686a45d763ca1899304416bd34
parentb6ccc67d8e42e38936df330b26ee6d022dda8a64
[TCP] FRTO: Add missing ECN CWR sending to one of the responses

The conservative spurious RTO response did not queue CWR even
though the sending rate was lowered. Whenever reduction happens
regardless of reason, CWR should be sent (forgetting to send it
is not very fatal though).

A better approach would be to queue CWR when one of the sending
rate reducing responses (rate-halving one or this conservative
response) is used already at RTO. Doing that would allow CWR to
be sent along with the two new data segments that are sent
during FRTO. However, it's a bit "racy" because userland could
tune the response sysctl to a more aggressive one in between.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/tcp_input.c