> > Yeah, but why bother if we can just allocate 10% of the size, waste a > > lot less memory etc. mac80211 isn't going to pass in a scatter/gather > > frame anyway. > > Hope never dies. I actually have seen this speed up the throughput so > I will dig into it anyway. Well, you can always add it back later if you make the networking stack and mac80211 support it. It's a two-line patch after all. > > The more interesting thing is the pci_alloc_consistent allocation right > > below that is also _huge_, but that's because of the stupid hardware > > design, or can the hardware cope with having the descriptors non-linear > > in memory? > > We talk after your next HW design. How will configure 265 * 16 > descriptors separately. Well, considering that other hardware does manage to do things differently (say Broadcom because I know their DMA engine), I don't know why your hw designers went wild with this. All you need is an "end-of-frame" flag. But that's not really interesting to discuss, unless this is actually controlled by the microcode and you can change it. johannes
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