linux-kernel - Re: [PATCH 3/5] mm: Don't manually decrement num_poisoned

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Message-Id: <20190617065231.GC16810@rapoport-lnx>
Date:   Mon, 17 Jun 2019 09:52:31 +0300
From:   Mike Rapoport <rppt@...ux.ibm.com>
To:     "Alastair D'Silva" <alastair@....ibm.com>
Cc:     alastair@...ilva.org, Andrew Morton <akpm@...ux-foundation.org>,
        David Hildenbrand <david@...hat.com>,
        Oscar Salvador <osalvador@...e.com>,
        Michal Hocko <mhocko@...e.com>,
        Pavel Tatashin <pasha.tatashin@...een.com>,
        Wei Yang <richard.weiyang@...il.com>,
        Arun KS <arunks@...eaurora.org>, Qian Cai <cai@....pw>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...nel.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Jiri Kosina <jkosina@...e.cz>,
        Mukesh Ojha <mojha@...eaurora.org>,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>,
        Baoquan He <bhe@...hat.com>,
        Logan Gunthorpe <logang@...tatee.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/5] mm: Don't manually decrement num_poisoned_pages

On Mon, Jun 17, 2019 at 02:36:29PM +1000, Alastair D'Silva wrote:
> From: Alastair D'Silva <alastair@...ilva.org>
> 
> Use the function written to do it instead.
> 
> Signed-off-by: Alastair D'Silva <alastair@...ilva.org>

Reviewed-by: Mike Rapoport <rppt@...ux.ibm.com>

> ---
>  mm/sparse.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/mm/sparse.c b/mm/sparse.c
> index 66a99da9b11b..e2402937efe4 100644
> --- a/mm/sparse.c
> +++ b/mm/sparse.c
> @@ -11,6 +11,8 @@
>  #include <linux/export.h>
>  #include <linux/spinlock.h>
>  #include <linux/vmalloc.h>
> +#include <linux/swap.h>
> +#include <linux/swapops.h>
> 
>  #include "internal.h"
>  #include <asm/dma.h>
> @@ -771,7 +773,7 @@ static void clear_hwpoisoned_pages(struct page *memmap,
> 
>  	for (i = map_offset; i < nr_pages; i++) {
>  		if (PageHWPoison(&memmap[i])) {
> -			atomic_long_sub(1, &num_poisoned_pages);
> +			num_poisoned_pages_dec();
>  			ClearPageHWPoison(&memmap[i]);
>  		}
>  	}
> -- 
> 2.21.0
> 

-- 
Sincerely yours,
Mike.