Re: (resend)WARNING: trying to isolate tail page in isolate_lru_page

["Yin, Fengwei" <fengwei.yin@intel.com>]

On 8/27/2022 1:15 AM, Matthew Wilcox wrote:
> On Fri, Aug 26, 2022 at 11:20:58AM +0800, Yin, Fengwei wrote:
>> On 8/26/2022 2:46 AM, Matthew Wilcox wrote:
>>> There's a number of ways of solving this.  I'm interested in seeing
>>> which one Minchan thinks is best.
>>
>> My understanding is:
>> PageTransCompound() return false for compound page if THP is disabled
>> in kernel config. Replacing PageTransCompound() with PageCompound() 
>> could work here. But for the long term, folio should be the answer. :).
> 
> Yes, ultimately, isolate_lru_page() is going away as an interface
> and one will have to call folio_isolate_lru().  But should
> madvise_cold_or_pageout_pte_range() even be getting called for VMAs
> which are mmaps of af_packet?  can_madv_lru_vma() rules out a number
> of different types of VMA; should it also be ruling out af_packet VMAs?
> If so, how?

Thanks a lot for the information which helps me to understand the real
concern here.

Regards
Yin, Fengwei