Re: [RFC PATCH 0/3] mm/compaction: honour compact_unevictable_allowed in mlock race and alloc_contig path

[Wandun]

On 6/4/26 10:38, Wandun Chen wrote:
> From: Wandun Chen <chenwandun@xxxxxxxxxxx>
> 
> vm.compact_unevictable_allowed=0 is meant to keep compaction from
> touching unevictable folios. In practice there are still two paths
> where it does not take effect. This series fixes them and adds a
> tracepoint to make such issues easier to diagnose in the future.

Gentle ping, any feedback on this series?

Sashiko found a potential compilation error in patch2, I'll address
that along with any review comments in v2.

Best regards,
Wandun

> 
> Wandun Chen (3):
>   mm/compaction: skip isolate mlocked folios when
>     compact_unevictable_allowed=0
>   mm/compaction: add per-folio isolation tracepoint
>   mm/compaction: respect compact_unevictable_allowed in alloc_contig
>     path
> 
>  include/linux/compaction.h        |  6 ++++++
>  include/trace/events/compaction.h | 26 ++++++++++++++++++++++++++
>  mm/compaction.c                   | 14 +++++++++++---
>  mm/internal.h                     |  1 +
>  mm/page_alloc.c                   |  2 ++
>  5 files changed, 46 insertions(+), 3 deletions(-)
>