Baruch Even wrote:
Ilpo Järvinen wrote:
Signed-off-by: Ilpo Järvinen <[EMAIL PROTECTED]>
---
Documentation/networking/ip-sysctl.txt | 13 +++++++++++++
1 files changed, 13 insertions(+), 0 deletions(-)
diff --git a/Documentation/networking/ip-sysctl.txt
b/Documentation/networking/ip-sysctl.txt
index ce16e6a..44ba8d4 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -239,6 +239,19 @@ tcp_max_orphans - INTEGER
more aggressively. Let me to remind again: each orphan eats
up to ~64K of unswappable memory.
+tcp_max_ssthresh - INTEGER
+ Limited Slow-Start for TCP with Large Congestion Windows defined in
+ RFC3742. Limited slow-start is a mechanism to limit grow of the
s/grow/growth/
+ congestion window on the region where congestion window is larger than
+ tcp_max_ssthresh. A TCP connection with a large congestion window could
+ have its congestion window increased by thousand (or even more)
+ segments per RTT by the traditional slow-start procedure which might be
+ counter-productive to TCP performance when packet losses start to
+ occur. With limited slow-start TCP increments congestion window at
+ most tcp_max_ssthresh/2 segments per RTT when the congestion window is
I'm not a native English speaker but "at most" sounds a bit awkward to
me, maybe change it to "by no more than". But I'm sure someone can find
a better phrasing.
It could be "by at most" or "by no more than" but indeed it should not just be
"at most."
Also, it should be "With limited slow-start TCP increments the congestion
window..." Combining with other nits yeilds:
Limited Slow-Start for TCP with Large Congestion Windows is defined in RFC3742.
Limited slow-start is a mechanism to limit growth of the congestion window
when the congestion window is larger than tcp_max_ssthresh. A TCP connection
with a large congestion window could have its congestion window increased by
thousands of segments (or more) per RTT via the traditional slow-start
procedures. This might degrade TCP performance when packet losses start to
occur. With limited slow-start, TCP increments the congestion window by at most
tcp_max_ssthresh/2 segments per RTT when the congestion window is is above
tcp_max_ssthresh.
rick jones
as an asside, "tcp_max_ssthresh" sounds like the maximum value ssthresh can
take-on. is that correct, or is this more of a "once ssthresh is above this,
behave in this new way?" If that is the case, while the horse has probably left
the barn, perhaps another name would be better?
Baruch
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