Re: [PATCH] mm: don't defer freeing kernel page tables while booting

[David Hildenbrand (Arm)]

On 9/24/26 09:28, Mikhail Gavrilov wrote:
> On 9/24/26 09:07, David Hildenbrand (Arm) wrote:
>> Should we instead simply skip the
>>
>> 	schedule_work(&kernel_pgtable_work.work);
>>
>> and rely on anybody freeing stuff later to just free that one alongside?
>>
>> That avoids throwing in more freeing handling.
> 
> Yes, that is simpler, and the early table then goes through the same
> IOMMU flush as every other one, so there is no need to reason about
> what an IOMMU can see during boot.  The only cost is that it waits on
> the list until the next kernel page table is freed after boot.

If we're worried about that actually causing problems we could drain the list at
a later part during the boot stage. I'd suspect we free something else later
already and simply drain the list ...

-- 
Cheers,

David