Regarding tx-nocache-copy in the Sheevaplug

[Eric Dumazet]

On Thu, 2014-10-16 at 10:34 -0700, Benjamin Poirier wrote:
> On 2014/10/15 15:45, Eric Dumazet wrote:

> >  kmap_atomic()/kunmap_atomic() is missing, so we lack
> > __cpuc_flush_dcache_area() operations.
> > 
> 
> You lost me there.
> 1) I don't see the link
> 2) It seems kmap_atomic and so on are there:
> $ grep kmap_atomic System.map-3.16-2-kirkwood
> c0014838 T kmap_atomic
> c001491c T kmap_atomic_pfn
> c00149a4 T kmap_atomic_to_page
> 
> MACH_KIRKWOOD selects CPU_FEROCEON which has
> __cpuc_flush_dcache_area ->
> 	cpu_cache.flush_kern_dcache_area ->
> 		feroceon_flush_kern_dcache_area

I meant to put a '?' instead of a '.'

Note that tcp does a copy, using :