Re: [RFC NO CODE] [DISCUSSION] Anti-fragmenting ordered buddy allocator

From: Dev Jain

Date: Mon Oct 12 2026 - 06:20:15 EST




On 12/10/26 3:29 am, Rik van Riel wrote:
> On Sun, 2026-10-11 at 21:54 +0000, Dev Jain wrote:
>>
>>
>> Apart from dividing the freelists between migratetypes, little
>> attempt
>> has been made to change the algorithm
>
> Could I convince you to take a look at these
> patches?

Thanks for replying Rik.


>
> https://lore.kernel.org/all/20261007021250.1665929-1-riel@xxxxxxxxxxx/

Indeed, I had seen these patches and from a cursory look I liked them.
I will eventually try to get into page-alloc review.


>
> My current plan is to first improve the
> fragmentation at pageblock level, and then
> add some slow path code on top of that
> which can steer the allocations by physical
> address range, to preserve the potential
> for gigablock page lalocation.
>