linux-kernel - Re: [PATCH part5 5/7] memblock, mem_hotplug: Make memblock skip hotpluggable regions by default.

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Message-ID: <1376517265-8yi1139t-mutt-n-horiguchi@ah.jp.nec.com>
Date:	Wed, 14 Aug 2013 17:54:25 -0400
From:	Naoya Horiguchi <n-horiguchi@...jp.nec.com>
To:	Tang Chen <tangchen@...fujitsu.com>
Cc:	robert.moore@...el.com, lv.zheng@...el.com, rjw@...k.pl,
	lenb@...nel.org, tglx@...utronix.de, mingo@...e.hu, hpa@...or.com,
	akpm@...ux-foundation.org, tj@...nel.org, trenn@...e.de,
	yinghai@...nel.org, jiang.liu@...wei.com, wency@...fujitsu.com,
	laijs@...fujitsu.com, isimatu.yasuaki@...fujitsu.com,
	izumi.taku@...fujitsu.com, mgorman@...e.de, minchan@...nel.org,
	mina86@...a86.com, gong.chen@...ux.intel.com,
	vasilis.liaskovitis@...fitbricks.com, lwoodman@...hat.com,
	riel@...hat.com, jweiner@...hat.com, prarit@...hat.com,
	zhangyanfei@...fujitsu.com, yanghy@...fujitsu.com, x86@...nel.org,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, linux-acpi@...r.kernel.org
Subject: Re: [PATCH part5 5/7] memblock, mem_hotplug: Make memblock skip
 hotpluggable regions by default.

On Thu, Aug 08, 2013 at 06:16:17PM +0800, Tang Chen wrote:
> --- a/mm/memblock.c
> +++ b/mm/memblock.c
...
> @@ -719,6 +723,10 @@ void __init_memblock __next_free_mem_range_rev(u64 *idx, int nid,
>  		if (nid != MAX_NUMNODES && nid != memblock_get_region_node(m))
>  			continue;
>  
> +		/* skip hotpluggable memory regions */
> +		if (m->flags & MEMBLOCK_HOTPLUG)
> +			continue;
> +
>  		/* scan areas before each reservation for intersection */
>  		for ( ; ri >= 0; ri--) {
>  			struct memblock_region *r = &rsv->regions[ri];
> -- 

Why don't you add this also in __next_free_mem_range()?

Thanks,
Naoya Horiguchi
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