linux-kernel - Re: [PATCH v2, part1 29/29] mm,kexec: use common help functions to free reserved pages

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Date:	Mon, 11 Mar 2013 13:16:12 +0800
From:	Zhang Yanfei <zhangyanfei@...fujitsu.com>
To:	Jiang Liu <liuj97@...il.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	David Rientjes <rientjes@...gle.com>,
	Jiang Liu <jiang.liu@...wei.com>,
	Wen Congyang <wency@...fujitsu.com>,
	Maciej Rutecki <maciej.rutecki@...il.com>,
	Chris Clayton <chris2553@...glemail.com>,
	"Rafael J . Wysocki" <rjw@...k.pl>, Mel Gorman <mgorman@...e.de>,
	Minchan Kim <minchan@...nel.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Michal Hocko <mhocko@...e.cz>,
	Jianguo Wu <wujianguo@...wei.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Eric Biederman <ebiederm@...ssion.com>
Subject: Re: [PATCH v2, part1 29/29] mm,kexec: use common help functions to
 free reserved pages

于 2013年03月10日 14:27, Jiang Liu 写道:
> Use common help functions to free reserved pages.
> 
> Signed-off-by: Jiang Liu <jiang.liu@...wei.com>
> Cc: Eric Biederman <ebiederm@...ssion.com>

Reviewed-by: Zhang Yanfei <zhangyanfei@...fujitsu.com>

> ---
>  kernel/kexec.c |    8 ++------
>  1 file changed, 2 insertions(+), 6 deletions(-)
> 
> diff --git a/kernel/kexec.c b/kernel/kexec.c
> index bddd3d7..be95397 100644
> --- a/kernel/kexec.c
> +++ b/kernel/kexec.c
> @@ -1118,12 +1118,8 @@ void __weak crash_free_reserved_phys_range(unsigned long begin,
>  {
>  	unsigned long addr;
>  
> -	for (addr = begin; addr < end; addr += PAGE_SIZE) {
> -		ClearPageReserved(pfn_to_page(addr >> PAGE_SHIFT));
> -		init_page_count(pfn_to_page(addr >> PAGE_SHIFT));
> -		free_page((unsigned long)__va(addr));
> -		totalram_pages++;
> -	}
> +	for (addr = begin; addr < end; addr += PAGE_SIZE)
> +		free_reserved_page(pfn_to_page(addr >> PAGE_SHIFT));
>  }
>  
>  int crash_shrink_memory(unsigned long new_size)

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