Re: [PATCH v2] x86: PAT: Documentation: rewrite "MTRR effects on PAT / non-PAT systems"

[Luis R. Rodriguez]

On Sat, Mar 05, 2016 at 12:52:55PM +0100, Ingo Molnar wrote:
> 
> * Luis R. Rodriguez <mcgrof@xxxxxxxxxx> wrote:
> 
> > The current documentation refers to using set_memory_wc() as a
> > possible hole strategy when you have overlapping ioremap() regions,
> 
> The whole explanation should talk about virtual aliases over the same physical 
> address, not some 'overlapping regions'.
> 
> I see where this talk about 'overlap' comes: the memtype rbtree in 
> arch/x86/mm/pat_rbtree.c indeed has memtype ranges that may overlap on the 
> physical side. But it is highly confusing to call this 'overlapping' on the driver 
> API documentation level without making it really clear what it's about.

Alright thanks, I think I'll just stick to aliasing. I'll go over the
threads and pick out only what is relevant.

  Luis