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    Subjectwhy does netfilter make upload very slow? (was: Re: e1000 -> 82540EM on linux 2.6.0-test[45] very slow in one direction)
    Ookhoi wrote (ao):
    # Ookhoi wrote (ao):
    # > Florian Zwoch wrote (ao):
    # > > issue seems to partly solved. the e1000 driver seems to be ok!
    # > > i reconfigured my kernel and intentionally left out netfilter options.
    # > > after that my network performance was back to normal.
    # > >
    # > > netfilter was only compiled in the kernel. it was not used with any rules!
    # > >
    # > > so my wild guess would be that something with the netfilter code (i am
    # > > not 100% sure it was netfilter.. _maybe_ it was some small odd kernel
    # > > option i accidently enabled/disabled) is broken since test3 (again
    # > > uncertified. but i firstly noticed this switching from test3 to test4).
    #
    # > I have netfilter enabled, and will try another -test6 kernel with
    # > netfilter not compiled in to see if that indeed makes a difference.
    #
    # I can confirm now that disabling netfilter in 2.6.0-test6 makes the nic
    # perform oke wrt upload.
    # I (just like Florian) had no iptables rules active in the former
    # 2.6.0-test6 kernel, but netfilter was compiled in.

    Would somebody like to explain why netfilter (in kernel, but not in use)
    makes upload go very slow? I am by no means a network guru, but eager to
    learn :-)
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