linux-kernel - Re: [PATCH 2/2] memory-hotplug: rename zones_online_to to valid

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Message-ID: <53FE705F.1050505@jp.fujitsu.com>
Date:	Thu, 28 Aug 2014 08:57:19 +0900
From:	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>
To:	Zhang Zhen <zhenzhang.zhang@...wei.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Rientjes <rientjes@...gle.com>,
	Dave Hansen <dave.hansen@...el.com>,
	Toshi Kani <toshi.kani@...com>
CC:	<wangnan0@...wei.com>, Linux MM <linux-mm@...ck.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] memory-hotplug: rename zones_online_to to valid_zones

(2014/08/27 20:18), Zhang Zhen wrote:
> Rename the interface to valid_zones according to most pepole's
> suggestion.
>
> Sample output of the sysfs files:
> 	memory0/valid_zones: none
> 	memory1/valid_zones: DMA32
> 	memory2/valid_zones: DMA32
> 	memory3/valid_zones: DMA32
> 	memory4/valid_zones: Normal
> 	memory5/valid_zones: Normal
> 	memory6/valid_zones: Normal Movable
> 	memory7/valid_zones: Movable Normal
> 	memory8/valid_zones: Movable
>
> Signed-off-by: Zhang Zhen <zhenzhang.zhang@...wei.com>

Reviewed-by: Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>

Thanks,
Yasuaki Ishimatsu

> ---
>   Documentation/ABI/testing/sysfs-devices-memory |  8 ++++----
>   Documentation/memory-hotplug.txt               | 13 ++++++++++---
>   drivers/base/memory.c                          |  6 +++---
>   3 files changed, 17 insertions(+), 10 deletions(-)
>
> diff --git a/Documentation/ABI/testing/sysfs-devices-memory b/Documentation/ABI/testing/sysfs-devices-memory
> index 2b2a1d7..deef3b5 100644
> --- a/Documentation/ABI/testing/sysfs-devices-memory
> +++ b/Documentation/ABI/testing/sysfs-devices-memory
> @@ -61,13 +61,13 @@ Users:		hotplug memory remove tools
>   		http://www.ibm.com/developerworks/wikis/display/LinuxP/powerpc-utils
>
>
> -What:           /sys/devices/system/memory/memoryX/zones_online_to
> +What:           /sys/devices/system/memory/memoryX/valid_zones
>   Date:           July 2014
>   Contact:	Zhang Zhen <zhenzhang.zhang@...wei.com>
>   Description:
> -		The file /sys/devices/system/memory/memoryX/zones_online_to
> -		is read-only and is designed to show which zone this memory block can
> -		be onlined to.
> +		The file /sys/devices/system/memory/memoryX/valid_zones	is
> +		read-only and is designed to show which zone this memory
> +		block can be onlined to.
>
>   What:		/sys/devices/system/memoryX/nodeY
>   Date:		October 2009
> diff --git a/Documentation/memory-hotplug.txt b/Documentation/memory-hotplug.txt
> index 5b34e33..93a25ef 100644
> --- a/Documentation/memory-hotplug.txt
> +++ b/Documentation/memory-hotplug.txt
> @@ -155,7 +155,7 @@ Under each memory block, you can see 4 files:
>   /sys/devices/system/memory/memoryXXX/phys_device
>   /sys/devices/system/memory/memoryXXX/state
>   /sys/devices/system/memory/memoryXXX/removable
> -/sys/devices/system/memory/memoryXXX/zones_online_to
> +/sys/devices/system/memory/memoryXXX/valid_zones
>
>   'phys_index'      : read-only and contains memory block id, same as XXX.
>   'state'           : read-write
> @@ -171,8 +171,15 @@ Under each memory block, you can see 4 files:
>                       block is removable and a value of 0 indicates that
>                       it is not removable. A memory block is removable only if
>                       every section in the block is removable.
> -'zones_online_to' : read-only: designed to show which zone this memory block
> -		    can be onlined to.
> +'valid_zones'     : read-only: designed to show which zones this memory block
> +		    can be onlined to.
> +		    The first column shows it's default zone.
> +		    "memory6/valid_zones: Normal Movable" shows this memoryblock
> +		    can be onlined to ZONE_NORMAL by default and to ZONE_MOVABLE
> +		    by online_movable.
> +		    "memory7/valid_zones: Movable Normal" shows this memoryblock
> +		    can be onlined to ZONE_MOVABLE by default and to ZONE_NORMAL
> +		    by online_kernel.
>
>   NOTE:
>     These directories/files appear after physical memory hotplug phase.
> diff --git a/drivers/base/memory.c b/drivers/base/memory.c
> index 0fc1d25..efd456c 100644
> --- a/drivers/base/memory.c
> +++ b/drivers/base/memory.c
> @@ -374,7 +374,7 @@ static ssize_t show_phys_device(struct device *dev,
>   }
>
>   #ifdef CONFIG_MEMORY_HOTREMOVE
> -static ssize_t show_zones_online_to(struct device *dev,
> +static ssize_t show_valid_zones(struct device *dev,
>   				struct device_attribute *attr, char *buf)
>   {
>   	struct memory_block *mem = to_memory_block(dev);
> @@ -409,7 +409,7 @@ static ssize_t show_zones_online_to(struct device *dev,
>
>   	return sprintf(buf, "%s\n", zone->name);
>   }
> -static DEVICE_ATTR(zones_online_to, 0444, show_zones_online_to, NULL);
> +static DEVICE_ATTR(valid_zones, 0444, show_valid_zones, NULL);
>   #endif
>
>   static DEVICE_ATTR(phys_index, 0444, show_mem_start_phys_index, NULL);
> @@ -563,7 +563,7 @@ static struct attribute *memory_memblk_attrs[] = {
>   	&dev_attr_phys_device.attr,
>   	&dev_attr_removable.attr,
>   #ifdef CONFIG_MEMORY_HOTREMOVE
> -	&dev_attr_zones_online_to.attr,
> +	&dev_attr_valid_zones.attr,
>   #endif
>   	NULL
>   };
> -- 1.8.1.4
>


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