Re: [PATCH v4 0/2] mm: improve folio refcount scalability

[David Hildenbrand (Arm)]

On 6/9/26 00:47, Andrew Morton wrote:
> On Mon, 08 Jun 2026 21:53:01 +0000 "Gladyshev Ilya" <ilya.gladyshev@xxxxxxxxx> wrote:
> 
>> This patch optimizes small file read performance and overall folio refcount
>> scalability by refactoring page_ref_add_unless [core of folio_try_get].
>> This is alternative approach to previous attempts to fix small read
>> performance by avoiding refcount bumps [1][2].
> 
> Thanks.  Nice numbers.
> 
> AI review had some things to say:
> 	https://sashiko.dev/#/patchset/df26082871b4c65b2bd38d409026237c08572836@xxxxxxxxx
> 
> I'm not sure we want all those new VM_BUG_ON_PAGE() calls in the long
> term.  They look like development-time assistance. 

VM_WARN_ON_ONCE_PAGE is usually more than sufficient to catch stuff early during
testing.

-- 
Cheers,

David