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    SubjectRe: [PATCH 3/3] net: wireless: bcm43xx: big_buffer_sem semaphore to mutex wrote:
    > Could this be the reason my BCM94311MCG rev 1 receives such terrible
    > performance with b43 but works well with bcm43xx? The device is
    > 802.11b/g but my router is 802.11b. I filed a report on this issue
    > here:

    No. On my BCM4311/1, my transfer rate peaked at about 12 Mbs with bcm43xx, but increased to 20 Mbs
    with b43. These tests were done with iperf with a server running running on a second computer
    connected by wire to my router. These rates are for 802.11g. When my interface was locked at 11 Mbs,
    the transfer rate was the expected 5.3-5.5 Mbs with both drivers.

    > I was told by Michael that I would have to fix it myself, and I am
    > trying, but the learning curve is a little steep. If this is relevant,
    > I might at least have some direction to go in.

    I suspect that mac80211 is doing something that your router does not like. Do you have any chance to
    capture the traffic between your computer and the router by using a second wireless computer running
    kismet or wireshark? A look at the differences between b43 and bcm43xx should show the reason.


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