From: Tang Chen <tangchen@cn.fujitsu.com>
To: Wen Congyang <wency@cn.fujitsu.com>
Cc: linux-s390@vger.kernel.org, linux-ia64@vger.kernel.org,
Len Brown <len.brown@intel.com>,
linux-acpi@vger.kernel.org, linux-sh@vger.kernel.org,
x86@kernel.org, linux-kernel@vger.kernel.org,
cmetcalf@tilera.com, Jianguo Wu <wujianguo@huawei.com>,
linux-mm@kvack.org,
Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>,
paulus@samba.org, Minchan Kim <minchan.kim@gmail.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
David Rientjes <rientjes@google.com>,
sparclinux@vger.kernel.org, Christoph Lameter <cl@linux.com>,
linuxppc-dev@lists.ozlabs.org,
Andrew Morton <akpm@linux-foundation.org>,
Jiang Liu <liuj97@gmail.com>
Subject: Re: [Patch v4 06/12] memory-hotplug: unregister memory section on SPARSEMEM_VMEMMAP
Date: Tue, 04 Dec 2012 17:34:04 +0800 [thread overview]
Message-ID: <50BDC38C.1060209@cn.fujitsu.com> (raw)
In-Reply-To: <1354010422-19648-7-git-send-email-wency@cn.fujitsu.com>
On 11/27/2012 06:00 PM, Wen Congyang wrote:
> From: Yasuaki Ishimatsu<isimatu.yasuaki@jp.fujitsu.com>
>
> Currently __remove_section for SPARSEMEM_VMEMMAP does nothing. But even if
> we use SPARSEMEM_VMEMMAP, we can unregister the memory_section.
>
> So the patch add unregister_memory_section() into __remove_section().
>
> CC: David Rientjes<rientjes@google.com>
> CC: Jiang Liu<liuj97@gmail.com>
> CC: Len Brown<len.brown@intel.com>
> CC: Christoph Lameter<cl@linux.com>
> Cc: Minchan Kim<minchan.kim@gmail.com>
> CC: Andrew Morton<akpm@linux-foundation.org>
> CC: KOSAKI Motohiro<kosaki.motohiro@jp.fujitsu.com>
> Signed-off-by: Yasuaki Ishimatsu<isimatu.yasuaki@jp.fujitsu.com>
> Signed-off-by: Wen Congyang<wency@cn.fujitsu.com>
__remove_section() of CONFIG_SPARSEMEM_VMEMMAP will be integrated
into one in [PATCH 08/12], so I think we can merge this patch into
[PATCH 08/12].
Reviewed-by: Tang Chen <tangchen@cn.fujitsu.com>
> ---
> mm/memory_hotplug.c | 13 ++++++++-----
> 1 file changed, 8 insertions(+), 5 deletions(-)
>
> diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
> index e741732..171610d 100644
> --- a/mm/memory_hotplug.c
> +++ b/mm/memory_hotplug.c
> @@ -279,11 +279,14 @@ static int __meminit __add_section(int nid, struct zone *zone,
> #ifdef CONFIG_SPARSEMEM_VMEMMAP
> static int __remove_section(struct zone *zone, struct mem_section *ms)
> {
> - /*
> - * XXX: Freeing memmap with vmemmap is not implement yet.
> - * This should be removed later.
> - */
> - return -EBUSY;
> + int ret = -EINVAL;
> +
> + if (!valid_section(ms))
> + return ret;
> +
> + ret = unregister_memory_section(ms);
> +
> + return ret;
> }
> #else
> static int __remove_section(struct zone *zone, struct mem_section *ms)
next prev parent reply other threads:[~2012-12-04 9:35 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-27 10:00 [Patch v4 00/12] memory-hotplug: hot-remove physical memory Wen Congyang
2012-11-27 10:00 ` [Patch v4 01/12] memory-hotplug: try to offline the memory twice to avoid dependence Wen Congyang
2012-12-04 9:17 ` Tang Chen
2012-11-27 10:00 ` [Patch v4 02/12] memory-hotplug: check whether all memory blocks are offlined or not when removing memory Wen Congyang
2012-12-04 9:22 ` Tang Chen
2012-11-27 10:00 ` [Patch v4 03/12] memory-hotplug: remove redundant codes Wen Congyang
2012-12-04 9:22 ` Tang Chen
2012-12-04 10:31 ` Tang Chen
2012-11-27 10:00 ` [Patch v4 04/12] memory-hotplug: remove /sys/firmware/memmap/X sysfs Wen Congyang
2012-11-27 10:00 ` [Patch v4 05/12] memory-hotplug: introduce new function arch_remove_memory() for removing page table depends on architecture Wen Congyang
2012-12-04 9:30 ` Tang Chen
2012-11-27 10:00 ` [Patch v4 06/12] memory-hotplug: unregister memory section on SPARSEMEM_VMEMMAP Wen Congyang
2012-12-04 9:34 ` Tang Chen [this message]
2012-11-27 10:00 ` [Patch v4 07/12] memory-hotplug: implement register_page_bootmem_info_section of sparse-vmemmap Wen Congyang
2012-11-27 10:00 ` [Patch v4 08/12] memory-hotplug: remove memmap " Wen Congyang
2012-11-28 9:40 ` Jianguo Wu
2012-11-30 1:45 ` Wen Congyang
2012-11-30 2:47 ` Jianguo Wu
2012-11-30 2:55 ` Yasuaki Ishimatsu
2012-12-03 2:23 ` Jianguo Wu
2012-12-04 9:13 ` Tang Chen
2012-12-04 12:20 ` Jianguo Wu
2012-12-05 2:07 ` Tang Chen
2012-12-05 3:23 ` Jianguo Wu
2012-12-07 1:42 ` Tang Chen
2012-12-07 2:20 ` Jianguo Wu
2012-12-04 9:47 ` Tang Chen
2012-11-27 10:00 ` [Patch v4 09/12] memory-hotplug: remove page table of x86_64 architecture Wen Congyang
2012-12-07 6:43 ` Tang Chen
2012-12-07 7:06 ` Jianguo Wu
2012-11-27 10:00 ` [Patch v4 10/12] memory-hotplug: memory_hotplug: clear zone when removing the memory Wen Congyang
2012-12-04 10:09 ` Tang Chen
2012-11-27 10:00 ` [Patch v4 11/12] memory-hotplug: remove sysfs file of node Wen Congyang
2012-12-04 10:10 ` Tang Chen
2012-11-27 10:00 ` [Patch v4 12/12] memory-hotplug: free node_data when a node is offlined Wen Congyang
2012-12-04 10:10 ` Tang Chen
2012-11-27 19:27 ` [Patch v4 00/12] memory-hotplug: hot-remove physical memory Andrew Morton
2012-11-27 19:38 ` Rafael J. Wysocki
2012-11-28 0:43 ` Yasuaki Ishimatsu
2012-11-30 6:37 ` Tang Chen
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