Re: [RFC v2] arm,x86,fs/resctrl: Generic schema description Proof of Concept

[Chen, Yu C]

Hi Fenghua,
On 8/10/2026 10:55 AM, Fenghua Yu wrote:

[ ... ]

> struct resctrl_ctrl {
> ...
>          struct list_head        emulated_by;
> };
>
> Does this mean a legacy resctrl control can be emulated by a few resctrl 
> controls (which is stored in the list)?
>
> e.g. legacy MB control can be emulated by a few controls? I thought 
> "MB:" line is emulated by only one native control. e.g. "MB:" line is 
> emulated by "MB_NODE:" line.

If I understand correctly, for region-aware RDT, the legacy MB control may
be emulated collectively by region0_control, region1_control, ..., 
regionN_control.
In the original definition, MB represents the traffic that misses the L3 
cache and
is refilled from all sources, which could include DRAM (region0), CXL 
(region1),
and others.

thanks,
Chenyu