Re: [PATCH mm-unstable v1 3/3] mm/codetag: add pgalloc_tag_copy()

[Andrew Morton]

On Tue,  3 Sep 2024 15:36:49 -0600 Yu Zhao <yuzhao@xxxxxxxxxx> wrote:

> Add pgalloc_tag_copy() to transfer the codetag from the old folio to
> the new one during migration. This makes original allocation sites
> persist cross migration rather than lump into compaction_alloc, e.g.,
>   # echo 1 >/proc/sys/vm/compact_memory
>   # grep compaction_alloc /proc/allocinfo
> 
> Before this patch:
>   132968448  32463  mm/compaction.c:1880 func:compaction_alloc
> 
> After this patch:
>           0      0  mm/compaction.c:1880 func:compaction_alloc
> 

I'm thinking that [2/3] should be backported?

And possibly this one, but for that we should identify a Fixes:, please.