Re: [PATCH v2 0/2] CXL: Apply SRAT defined PXM to entire CFMWS window

[Dan Williams]

Jonathan Cameron wrote:
> On Wed, 14 Jun 2023 10:32:40 +0200
> Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
> 
> > On Tue, Jun 13, 2023 at 09:35:23PM -0700, alison.schofield@xxxxxxxxx wrote:
> > > The CXL subsystem requires the creation of NUMA nodes for CFMWS  
> > 
> > The thing is CXL some persistent memory thing, right? But what is this
> > CFMWS thing? I don't think I've ever seen that particular combination of
> > letters together.
> > 
> Hi Peter,
> 
> To save time before the US based folk wake up.
> 
[..]
> Note there is no requirement that the access characteristics of memory mapped
> into a given CFMWS should be remotely consistent across the whole window
>  - some of the window may route through switches, and to directly connected
>    devices.
> That's a simplifying assumption made today as we don't yet know the full
> scope of what people are building.
> 
> Hope that helps (rather than causing confusion!)

Thanks Jonathan! Patch 1 changelog also goes into more detail.