Re: [PATCH v4 00/10] x86,fs/resctrl: Fix long-standing issues

[Reinette Chatre]

Hi Everybody,

Addressing the non patch specific Sashiko feedback from
https://sashiko.dev/#/patchset/cover.1780456704.git.reinette.chatre%40intel.com

I respond to patch specific Sashiko feedback in individual patches.

On 6/2/26 8:27 PM, Reinette Chatre wrote:
> v3: https://lore.kernel.org/lkml/cover.1779476724.git.reinette.chatre@xxxxxxxxx/
> v2: https://lore.kernel.org/lkml/20260515193944.15114-1-tony.luck@xxxxxxxxx/
> v1: https://lore.kernel.org/all/20260508182143.14592-1-tony.luck@xxxxxxxxx/
> 
> While reviewing the AET series [1] Sashiko reported a deadlock during mount,
> and a use-after-free when an L3 domain is removed during CPU offline. More issues
> were uncovered as fixes were developed and reviewed. While the goal is to
> fix all issues the races surrounding pseudo-locked regions are not yet
> solved and have been removed from this version of fixes.

As anticipated Sashiko reported the issues surrounding pseudo-locking. There is
one new concern raised between pseudo-locked regions and assigned counters but
pseudo-locking is a model-specific feature on hardware that does not support
assigned counters.

Sashiko did uncover one new issue related to the limbo handler when SNC is enabled.
For this I am currently planning to add this patch to this series: