Re: [RFC Patch 0/5] Make anon_vma operations testable

[Wei Yang <richard.weiyang@gmail.com>]

On Fri, May 30, 2025 at 04:39:21PM +0200, David Hildenbrand wrote:
[...]
>> 
>> Here you mean for all anon/shmem/pagecache pages, we could have two category
>> tests:
>> 
>>    * migrate and write different data from on process, verify each process see
>>      new data
>>    * trigger pageout from one process, verify each process has it pageout
>>      (/proc/self/pagemap)
>> 
>> While one of these category is enough, right? Just like KSM below, migrate or
>> pageout.
>
>Both cases will trigger different code paths: for example, migration will
>trigger restoring of migration entries, which is a different rmap operation
>not triggered by pageout/pagein :)
>
>Pageout is probably easier to implement: but we couldn't test hugetlb. With
>migration we probably could also test hugetlb rmap code (yet another case we
>should probably cover).
>

Oh, the pageout/pagein here is the madvise(MADV_PAGEOUT) one you mention in
your previous reply?

I thought you propose another scenario. Sorry for not following your message.

>-- 
>Cheers,
>
>David / dhildenb

-- 
Wei Yang
Help you, Help me