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authorEric Dumazet <eric.dumazet@gmail.com>2011-12-09 02:46:45 +0000
committerDavid S. Miller <davem@davemloft.net>2011-12-09 13:46:15 -0500
commita73ed26bbae7327370c5bd298f07de78df9e3466 (patch)
tree3c7a04e638261cdd16c324ecd07e303e72fac3b9 /drivers/atm
parent0221cd51543972782af558c527e4ac58b32049fa (diff)
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op-kernel-dev-a73ed26bbae7327370c5bd298f07de78df9e3466.tar.gz
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 <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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