Re: [PATCH v5 0/3] x86,fs/resctrl,arm_mpam: Factor MBA parse-time conversion to be per-arch

[Moger, Babu]

Ran few tests on the series. Everything looks good.

Tested-by: Babu Moger <babu.moger@xxxxxxx>


On 7/14/2026 12:45 PM, Reinette Chatre wrote:
> Dear x86 maintainers,
>
> Could you please consider this series for inclusion? It applies cleanly on top
> of x86/cache with HEAD at
> 	 2566b5cd6a27 ("fs/resctrl: Fix UAF from worker threads when domains are removed")
>
> Please note that this is the first instance of a series that touches resctrl fs, x86, and
> Arm. Since this is a resctrl fs API change these patches should stay together. You will
> find in Ben's message below that patch routing via tip is supported by Arm.
>
> Thank you very much
>
> Reinette
>
> On 7/9/26 2:31 AM, Ben Horgan wrote:
> > This version fixes a couple of non-functional mistakes in v4 pointed out by Reinette.
> >
> > The patches should stay together so please could this all go via tip.
> >
> > Changelogs in patches.
> >
> >  From cover letter of v3:
> >
> > This is a new version of Dave Martin's patch [1] to delegate rounding of
> > bandwidth control user values to the arch code. As there is now more than one
> > architecture using resctrl, I split the original patch into two, a core resctrl
> > patch and an x86 patch, and added an MPAM patch. Please let me know if the patch
> > break down and ordering is sensible and whether the pattern should be followed
> > for any future similar changes.
> >
> > This does have a user visible effect on MB schema when using MPAM hardware
> > with 'bandwidth_gran' greater than 1. I'm not sure if MPAM hardware with such
> > coarse controls exists in the wild but it is spec compliant and I've tested it
> > on a model.
> >
> > [1] https://lore.kernel.org/lkml/20251031154225.14799-1-Dave.Martin@xxxxxxx/
> >
> > v3: https://lore.kernel.org/lkml/20260515140612.1205251-1-ben.horgan@xxxxxxx/
> > v4: https://lore.kernel.org/lkml/20260706160639.2136674-1-ben.horgan@xxxxxxx/
> >
> > Based on v7.2-rc2
> >
> > Ben Horgan (1):
> >    arm_mpam: resctrl: Add pass-through resctrl_arch_preconvert_bw()
> >
> > Dave Martin (2):
> >    x86,fs/resctrl: Add resctrl_arch_preconvert_bw()
> >    fs/resctrl: Factor MBA parse-time conversion to be per-arch
> >
> >   Documentation/filesystems/resctrl.rst     | 17 +++++++++--------
> >   arch/x86/kernel/cpu/resctrl/ctrlmondata.c |  6 ++++++
> >   drivers/resctrl/mpam_resctrl.c            |  5 +++++
> >   fs/resctrl/ctrlmondata.c                  |  6 +++---
> >   include/linux/resctrl.h                   | 19 +++++++++++++++++++
> >   5 files changed, 42 insertions(+), 11 deletions(-)