Re: [PATCH 2/5] x86,fs/resctrl: Remove "arch_needs_linear"

[Chen, Yu C]

Hi Reinette,

On 9/4/2026 11:50 PM, Reinette Chatre wrote:
> Hi Chenyu,

[ ... ]

> > > +
> > > +	if (!(ecx & MBA_IS_LINEAR))
> >
> > Maybe also print the following from rdt_get_mb_table()?
> > 	pr_info("MBA b/w map not implemented for cpu:%d, model:%d",
> > 		boot_cpu_data.x86, boot_cpu_data.x86_model);
> >
> > In the previous patch, a "Non Linear delay-bw map" warning is triggered
> > during the actual write operation. Similarly, displaying such a message
> > during bootup in this patch might also be helpful.
> ok ... but who will the message be helpful to? This is a check of
> hardware state, not x86 resctrl driver state as in the previous patch.

This can be used by the admin (not the driver) to query why MBA is not
enabled by checking the boot message, IMO.

thanks,
Chenyu