Hi, I am currently wondering, if we should use NETDEV_TX_LOCKED in the bcm43xx wireless net driver.
I currently don't have an SMP machine with a bcm43xx card running, so I can't use benchmarks to find out. There are various things to consider: * The RX and TX-status paths, which also must take the spinlock aren't more expensive than on a normal Ethernet card (at least with d80211 stack). * But the retry-path, when a NETDEV_TX_LOCKED is returned is slightly more expensive. Well, the question is: Is it worth to return NETDEV_TX_LOCKED on spinlock contention, or is it better to spin? Is NETDEV_TX_LOCKED only desired on gigabit ethernet? Thanks. -- Greetings Michael. _______________________________________________ Bcm43xx-dev mailing list [email protected] https://lists.berlios.de/mailman/listinfo/bcm43xx-dev
