Re: [PATCH] mm: add per-order mTHP swap-in fallback counters

[Wenchao Hao]

On 2024/11/22 06:32, Barry Song wrote:
> On Fri, Nov 22, 2024 at 5:28 AM Wenchao Hao <haowenchao22@xxxxxxxxx> wrote:
>>
>> Now large folio swap-in is supported, but we do not have a method
>> to analyze the success ratio of large folio swap-ins. Similar to
>> anon_fault_fallback, we add a per-order mTHP swpin_fallback to help
>> calculate the success ratio. The new counter is located at:
>>
>> /sys/kernel/mm/transparent_hugepage/hugepages-<size>/stats/swpin_fallback
> 
> Well,  this could be useful for profiling, but why not also add
> MTHP_STAT_SWPIN_FALLBACK_CHARGE ?
> 

Hi, since my current testing scenario does not involve
MTHP_STAT_SWPIN_FALLBACK_CHARGE, I will soon resend a V2 version
to add it.

Thanks.