On Thu, Apr 16, 2015 at 08:54:26PM +0200, Luis R. Rodriguez wrote:
> > Without WC, descriptors would end up as multiple 4B or 8B MWr packets
> > to the NIC, which has a pretty big performance impact on this
> > particular NIC.
>
> How big are the descriptors?
Some are 64B (a batch of eight 8B des
On Thu, Apr 16, 2015 at 01:58:16AM +0200, Luis R. Rodriguez wrote:
>
> An alternative... is to just ioremap_wc() the entire region, including
> MMIO registers for these old devices. I see one ethernet driver that does
> this, myri10ge, and am curious how and why they ended up deciding this
> and i
