linux-kernel - Re: [PATCH v2 7/7] memory-hotplug: tile: suitable memory should go to ZONE

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Message-ID: <53CDD5EE.1030805@huawei.com>
Date:	Tue, 22 Jul 2014 11:09:34 +0800
From:	Wang Nan <wangnan0@...wei.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Wang Nan <wangnan0@...wei.com>, Ingo Molnar <mingo@...hat.com>,
	Yinghai Lu <yinghai@...nel.org>, Mel Gorman <mgorman@...e.de>,
	Dave Hansen <dave.hansen@...el.com>,
	Zhang Yanfei <zhangyanfei@...fujitsu.com>,
	<peifeiyue@...wei.com>, <linux-mm@...ck.org>, <x86@...nel.org>,
	<linux-ia64@...r.kernel.org>, <linuxppc-dev@...ts.ozlabs.org>,
	<linux-sh@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	Chris Metcalf <cmetcalf@...era.com>
Subject: Re: [PATCH v2 7/7] memory-hotplug: tile: suitable memory should go
 to ZONE_MOVABLE

Hi Andrew,

Please drop patch 7/7 from -mm tree and keep other 6 patches.

arch_add_memory() in tile is different from others: no nid parameter.
Patch 7/7 will block compiling.

I cc this mail to Chris Metcalf and hope he can look at this issue.

Other 6 patches looks good.

On 2014/7/21 11:46, Wang Nan wrote:
> This patch introduces zone_for_memory() to arch_add_memory() on tile to
> ensure new, higher memory added into ZONE_MOVABLE if movable zone has
> already setup.
> 
> This patch also fix a problem: on tile, new memory should be added into
> ZONE_HIGHMEM by default, not MAX_NR_ZONES-1, which is ZONE_MOVABLE.
> 
> Signed-off-by: Wang Nan <wangnan0@...wei.com>
> Cc: Zhang Yanfei <zhangyanfei@...fujitsu.com>
> Cc: Dave Hansen <dave.hansen@...el.com>
> ---
>  arch/tile/mm/init.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/tile/mm/init.c b/arch/tile/mm/init.c
> index bfb3127..22ac6c1 100644
> --- a/arch/tile/mm/init.c
> +++ b/arch/tile/mm/init.c
> @@ -872,7 +872,8 @@ void __init mem_init(void)
>  int arch_add_memory(u64 start, u64 size)
>  {
>  	struct pglist_data *pgdata = &contig_page_data;
> -	struct zone *zone = pgdata->node_zones + MAX_NR_ZONES-1;
> +	struct zone *zone = pgdata->node_zones +
> +		zone_for_memory(nid, start, size, ZONE_HIGHMEM);
>  	unsigned long start_pfn = start >> PAGE_SHIFT;
>  	unsigned long nr_pages = size >> PAGE_SHIFT;
>  
> 


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