linux-kernel - Re: [PATCH v5 2/6] memblock: Introduce bottom-up allocation mode

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Message-ID: <52446618.7070703@gmail.com>
Date:	Fri, 27 Sep 2013 00:51:36 +0800
From:	Zhang Yanfei <zhangyanfei.yes@...il.com>
To:	Tejun Heo <tj@...nel.org>
CC:	"Rafael J . Wysocki" <rjw@...k.pl>, lenb@...nel.org,
	Thomas Gleixner <tglx@...utronix.de>, mingo@...e.hu,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Toshi Kani <toshi.kani@...com>,
	Wanpeng Li <liwanp@...ux.vnet.ibm.com>,
	Thomas Renninger <trenn@...e.de>,
	Yinghai Lu <yinghai@...nel.org>,
	Jiang Liu <jiang.liu@...wei.com>,
	Wen Congyang <wency@...fujitsu.com>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	isimatu.yasuaki@...fujitsu.com, izumi.taku@...fujitsu.com,
	Mel Gorman <mgorman@...e.de>, Minchan Kim <minchan@...nel.org>,
	mina86@...a86.com, gong.chen@...ux.intel.com,
	vasilis.liaskovitis@...fitbricks.com, lwoodman@...hat.com,
	Rik van Riel <riel@...hat.com>, jweiner@...hat.com,
	prarit@...hat.com, "x86@...nel.org" <x86@...nel.org>,
	linux-doc@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Linux MM <linux-mm@...ck.org>, linux-acpi@...r.kernel.org,
	imtangchen@...il.com, Zhang Yanfei <zhangyanfei@...fujitsu.com>
Subject: Re: [PATCH v5 2/6] memblock: Introduce bottom-up allocation mode

On 09/26/2013 11:37 PM, Zhang Yanfei wrote:
> Hello tejun,
> 
> Thanks for your quick comments first:)
> 
> On 09/26/2013 10:45 PM, Tejun Heo wrote:
>> Hello,
>>
>> On Wed, Sep 25, 2013 at 02:27:48AM +0800, Zhang Yanfei wrote:
>>> +#ifdef CONFIG_MOVABLE_NODE
>>> +static inline void memblock_set_bottom_up(bool enable)
>>> +{
>>> +	memblock.bottom_up = enable;
>>> +}
>>> +
>>> +static inline bool memblock_bottom_up(void)
>>> +{
>>> +	return memblock.bottom_up;
>>> +}
>>
>> Can you please explain what this is for here?
> 
> OK, will do.

I write the function description here so you could give your
comments still in this version.

/*
 * Set the allocation direction to bottom-up or top-down.
 */
static inline void memblock_set_bottom_up(bool enable)
{
        memblock.bottom_up = enable;
}


/*
 * Check if the allocation direction is bottom-up or not.
 * if this is true, that said, the boot option "movablenode"
 * has been specified, and memblock will allocate memory
 * just near the kernel image.
 */
static inline bool memblock_bottom_up(void)
{
        return memblock.bottom_up;
}

Thanks.

-- 
Thanks.
Zhang Yanfei
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