Re: [PATCH v7 0/7] x86,fs/resctrl: Pave the way for MPAM counter assignment

[Ben Horgan]

On 5/6/26 16:01, Moger, Babu wrote:
> Hi Ben,
> 
> The patches look good overall. Just one small note: I was testing v6 and noticed that v7 has already been posted. It
> would be helpful to leave a few days between versions unless you’re trying to make the merge window.
> 
> Tested-by: Babu Moger <babu.moger@xxxxxxx>
> Reviewed-by: Babu Moger <babu.moger@xxxxxxx>

Thanks Babu :)

> 
> Thanks
> Babu
> 
> On 5/6/2026 3:28 AM, Ben Horgan wrote:
>> Essentially a resend of v6, just adding a missing commit message separator, ---,
>> in the first commit. All patches now have Reinette's Reviewed-by tag, thanks!
>>
>> Cover letter from v6:
>>
>> No functional changes from v5. Just comment and commit message changes based on
>> review comments. Changelogs in patches.
>>
>> Description from a previous version's cover letter:
>>
>> A little bit of preparatory work to get ready for MPAM counter
>> assignment. Resctrl gained support last year for counter assignment for AMD
>> machines supporting ABMC. Tighten a few things up, that weren't needed for
>> AMD, so that the MPAM driver can emulate ABMC and hence support counter
>> assignment.
>>
>> Based on v7.1-rc2
>>
>> v1:
>> https://lore.kernel.org/lkml/20260225201905.3568624-1-ben.horgan@xxxxxxx/
>> v2:
>> https://lore.kernel.org/lkml/20260313174524.3482767-1-ben.horgan@xxxxxxx/
>> v3:
>> https://lore.kernel.org/lkml/20260319162225.378485-1-ben.horgan@xxxxxxx/
>> v4:
>> https://lore.kernel.org/lkml/20260326172551.1553871-1-ben.horgan@xxxxxxx/
>> v5:
>> https://lore.kernel.org/lkml/20260428130422.2287302-1-ben.horgan@xxxxxxx/
>> v6:
>> https://lore.kernel.org/lkml/20260505155741.3591201-1-ben.horgan@xxxxxxx/
>>
>> Ben Horgan (7):
>>    fs/resctrl: Tidy up the error path in resctrl_mkdir_event_configs()
>>    x86,fs/resctrl: Create 'event_filter' files read only if they're not
>>      configurable
>>    fs/resctrl: Disallow the software controller when MBM counters are
>>      assignable
>>    fs/resctrl: Add monitor property 'mbm_cntr_assign_fixed'
>>    fs/resctrl: Continue counter allocation after failure
>>    fs/resctrl: Document that automatic counter assignment is best effort
>>    fs/resctrl: Document tasks file behaviour for task id 0 and idle tasks
>>
>>   Documentation/filesystems/resctrl.rst | 22 +++++++++++-----
>>   arch/x86/kernel/cpu/resctrl/monitor.c |  1 +
>>   fs/resctrl/internal.h                 |  2 ++
>>   fs/resctrl/monitor.c                  | 30 ++++++++++++++++------
>>   fs/resctrl/rdtgroup.c                 | 36 ++++++++++++++++++---------
>>   include/linux/resctrl.h               | 18 ++++++++------
>>   6 files changed, 77 insertions(+), 32 deletions(-)
>>
>