On Wed, 2019-10-23 at 11:59 +0200, Toke Høiland-Jørgensen wrote: > From: Toke Høiland-Jørgensen <toke@xxxxxxxxxx> > > To implement airtime queue limiting, we need to keep a running account of > the estimated airtime of all skbs queued into the device. Do to this > correctly, we need to store the airtime estimate into the skb so we can > decrease the outstanding balance when the skb is freed. This means that the > time estimate must be stored somewhere that will survive for the lifetime > of the skb. > > To get this, decrease the size of the ack_frame_id field to 6 bits, and > lower the size of the ID space accordingly. This leaves 10 bits for use for > tx_time_est, which is enough to store a maximum of 4096 us, if we shift the > values so they become units of 4us. > I've applied this as preparation. johannes
