Re: [PATCH v3 09/13] powerpc/mm: replace batch->active with in_lazy_mmu_mode()

Kevin Brodsky
2025-10-24T12:17:03Z

On 23/10/2025 22:02, David Hildenbrand wrote:
> On 15.10.25 10:27, Kevin Brodsky wrote:
>> The generic lazy_mmu layer now tracks whether a task is in lazy MMU
>> mode. As a result we no longer need to track whether the per-CPU TLB
>> batch struct is active - we know it is if in_lazy_mmu_mode() returns
>> true.
>
> It's worth adding that disabling preemption while enabled makes sure
> that we cannot reschedule while in lazy MMU mode, so when the per-CPU
> TLB batch structure is active.

Yes good point, otherwise this change doesn't make sense. I'll add that.

- Kevin