linux/include/net/red.h, branch v2.6.19

[PKT_SCHED] RED: Fix overflow in calculation of queue average

2006-08-05T05:59:51Z

Overflow can occur very easily with 32 bits, e.g., with 1 second us_idle is approx. 2^20, which leaves only 11-Wlog bits for queue length. Since the EWMA exponent is typically around 9, queue lengths larger than 2^2 cause overflow. Whether the affected branch is taken when us_idle is as high as 1 second, depends on Scell_log, but with rather reasonable configuration Scell_log is large enough to cause p->Stab to have zero index, which always results zero shift (typically also few other small indices result in zero shift). Signed-off-by: Ilpo Järvinen Signed-off-by: David S. Miller

Don't include linux/config.h from anywhere else in include/

2006-04-26T11:56:16Z

Signed-off-by: David Woodhouse

[PKT_SCHED]: Generic RED layer

2005-11-05T21:02:24Z

Extracts the RED algorithm from sch_red.c and puts it into include/net/red.h for use by other RED based modules. The statistics are extended to be more fine grained in order to differ between probability/forced marks/drops. We now reset the average queue length when setting new parameters, leaving it might result in an unreasonable qavg for a while depending on the value of W. Signed-off-by: Thomas Graf Signed-off-by: Arnaldo Carvalho de Melo