From: Eric Dumazet Date: Fri, 9 Dec 2011 02:46:45 +0000 (+0000) Subject: sch_red: generalize accurate MAX_P support to RED/GRED/CHOKE X-Git-Tag: v3.3-rc1~182^2~280 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a73ed26bbae7327370c5bd298f07de78df9e3466;p=pandora-kernel.git sch_red: generalize accurate MAX_P support to RED/GRED/CHOKE Now RED uses a Q0.32 number to store max_p (max probability), allow RED/GRED/CHOKE to use/report full resolution at config/dump time. Old tc binaries are non aware of new attributes, and still set/get Plog. New tc binary set/get both Plog and max_p for backward compatibility, they display "probability value" if they get max_p from new kernels. # tc -d qdisc show dev ... ... qdisc red 10: parent 1:1 limit 360Kb min 30Kb max 90Kb ecn ewma 5 probability 0.09 Scell_log 15 Make sure we avoid potential divides by 0 in reciprocal_value(), if (max_th - min_th) is big. Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- Reading git-diff-tree failed