linux-kernel - Re: [PATCH 3/3] mm, pcpu: Make zone pcp updates and reset internal to the mm

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Date:   Fri, 18 Oct 2019 15:02:05 +0200
From:   Michal Hocko <mhocko@...nel.org>
To:     Mel Gorman <mgorman@...hsingularity.net>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Thomas Gleixner <tglx@...utronix.de>,
        Matt Fleming <matt@...eblueprint.co.uk>,
        Borislav Petkov <bp@...en8.de>, Linux-MM <linux-mm@...ck.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/3] mm, pcpu: Make zone pcp updates and reset internal
 to the mm

On Fri 18-10-19 11:56:06, Mel Gorman wrote:
> Memory hotplug needs to be able to reset and reinit the pcpu allocator
> batch and high limits but this action is internal to the VM. Move
> the declaration to internal.h
> 
> Signed-off-by: Mel Gorman <mgorman@...hsingularity.net>

Acked-by: Michal Hocko <mhocko@...e.com>

> ---
>  include/linux/mm.h | 3 ---
>  mm/internal.h      | 3 +++
>  2 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/include/linux/mm.h b/include/linux/mm.h
> index cc292273e6ba..22d6104f2341 100644
> --- a/include/linux/mm.h
> +++ b/include/linux/mm.h
> @@ -2219,9 +2219,6 @@ void warn_alloc(gfp_t gfp_mask, nodemask_t *nodemask, const char *fmt, ...);
>  
>  extern void setup_per_cpu_pageset(void);
>  
> -extern void zone_pcp_update(struct zone *zone);
> -extern void zone_pcp_reset(struct zone *zone);
> -
>  /* page_alloc.c */
>  extern int min_free_kbytes;
>  extern int watermark_boost_factor;
> diff --git a/mm/internal.h b/mm/internal.h
> index 0d5f720c75ab..0a3d41c7b3c5 100644
> --- a/mm/internal.h
> +++ b/mm/internal.h
> @@ -165,6 +165,9 @@ extern void post_alloc_hook(struct page *page, unsigned int order,
>  					gfp_t gfp_flags);
>  extern int user_min_free_kbytes;
>  
> +extern void zone_pcp_update(struct zone *zone);
> +extern void zone_pcp_reset(struct zone *zone);
> +
>  #if defined CONFIG_COMPACTION || defined CONFIG_CMA
>  
>  /*
> -- 
> 2.16.4
> 

-- 
Michal Hocko
SUSE Labs