[PATCH v4 00/12] mm: make userland page table freeing RCU-safe

[David Hildenbrand (Arm)]

On 9/23/26 01:00, Andrew Morton wrote:
> On Tue, 22 Sep 2026 16:35:31 +0100 "Lorenzo Stoakes (ARM)" <ljs at kernel.org> wrote:
> 
>> The majority of architectures in the kernel defer page table freeing until
>> an RCU grace period has elapsed, this series converts all remaining
>> architectures to do so too and eliminates CONFIG_MMU_GATHER_RCU_TABLE_FREE
>> altogether.
>>
>> This is important because it enables safe lockless page table walking under
>> RCU alone.
> 
> Do we have reason to believe that anyone is seeing any effects from
> their arch's failure to rcu-free the page tables?
> 
> This sounds like a rather long-standing wart, yes?
> 
> The patchset is thinly reviewed and mm.git is bursting at the seams
> again.  I'll play wait-and-see on this series.
Do we want to nudge arch maintainers to review?

-- 
Cheers,

David