[PATCH v2 01/47] mm: vmscan: move shrinker-related code into a separate file

[Muchun Song]

> On Jul 24, 2023, at 17:43, Qi Zheng <zhengqi.arch at bytedance.com> wrote:
> 
> The mm/vmscan.c file is too large, so separate the shrinker-related
> code from it into a separate file. No functional changes.
> 
> Signed-off-by: Qi Zheng <zhengqi.arch at bytedance.com>
> ---
> include/linux/shrinker.h |   3 +
> mm/Makefile              |   4 +-
> mm/shrinker.c            | 707 +++++++++++++++++++++++++++++++++++++++
> mm/vmscan.c              | 701 --------------------------------------
> 4 files changed, 712 insertions(+), 703 deletions(-)
> create mode 100644 mm/shrinker.c
> 
> diff --git a/include/linux/shrinker.h b/include/linux/shrinker.h
> index 224293b2dd06..961cb84e51f5 100644
> --- a/include/linux/shrinker.h
> +++ b/include/linux/shrinker.h
> @@ -96,6 +96,9 @@ struct shrinker {
>  */
> #define SHRINKER_NONSLAB (1 << 3)
> 
> +unsigned long shrink_slab(gfp_t gfp_mask, int nid, struct mem_cgroup *memcg,
> +			   int priority);

A good cleanup, vmscan.c is so huge.

I'd like to introduce a new header in mm/ directory and contains those
declarations of functions (like this and other debug function in
shrinker_debug.c) since they are used internally across mm.

Thanks.