Re: [RFC PATCH 1/5] mm: memcg: make memcg huge page split support any order split.
From: Zi Yan
Date: Mon Mar 21 2022 - 16:27:05 EST
On 21 Mar 2022, at 15:54, Matthew Wilcox wrote:
> On Mon, Mar 21, 2022 at 03:07:46PM -0400, Zi Yan wrote:
>> Yes. Will change it to new_nr to be consistent.
>
> uh, you're going to call ilog2?
fortunately, no. Inside split_page_memcg(), I probably
need to add VM_BUG_ON(nr % new_nr != 0) to make sure
new_nr is a divisor of nr, since there are a couple
of nr / new_nr operations. Otherwise, new_nr works.
>
> I think this would look less inconsistent if 'nr' were an unsigned long
> (how long until we need 16GB pages? Think PPC already supports those)
--
Best Regards,
Yan, Zi
Attachment:
signature.asc
Description: OpenPGP digital signature