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 12/12] memory-hotplug: free node_data when a node is offlined
Date: Tue, 04 Dec 2012 18:10:13 +0800 [thread overview]
Message-ID: <50BDCC05.7090800@cn.fujitsu.com> (raw)
In-Reply-To: <1354010422-19648-13-git-send-email-wency@cn.fujitsu.com>
On 11/27/2012 06:00 PM, Wen Congyang wrote:
> We call hotadd_new_pgdat() to allocate memory to store node_data. So we
> should free it when removing a node.
>
> CC: David Rientjes<rientjes@google.com>
> CC: Jiang Liu<liuj97@gmail.com>
> CC: Len Brown<len.brown@intel.com>
> CC: Benjamin Herrenschmidt<benh@kernel.crashing.org>
> CC: Paul Mackerras<paulus@samba.org>
> 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>
> CC: Yasuaki Ishimatsu<isimatu.yasuaki@jp.fujitsu.com>
> Signed-off-by: Wen Congyang<wency@cn.fujitsu.com>
Reviewed-by: Tang Chen <tangchen@cn.fujitsu.com>
> ---
> mm/memory_hotplug.c | 20 +++++++++++++++++++-
> 1 file changed, 19 insertions(+), 1 deletion(-)
>
> diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
> index 449663e..d1451ab 100644
> --- a/mm/memory_hotplug.c
> +++ b/mm/memory_hotplug.c
> @@ -1309,9 +1309,12 @@ static int check_cpu_on_node(void *data)
> /* offline the node if all memory sections of this node are removed */
> static void try_offline_node(int nid)
> {
> + pg_data_t *pgdat = NODE_DATA(nid);
> unsigned long start_pfn = NODE_DATA(nid)->node_start_pfn;
> - unsigned long end_pfn = start_pfn + NODE_DATA(nid)->node_spanned_pages;
> + unsigned long end_pfn = start_pfn + pgdat->node_spanned_pages;
> unsigned long pfn;
> + struct page *pgdat_page = virt_to_page(pgdat);
> + int i;
>
> for (pfn = start_pfn; pfn< end_pfn; pfn += PAGES_PER_SECTION) {
> unsigned long section_nr = pfn_to_section_nr(pfn);
> @@ -1338,6 +1341,21 @@ static void try_offline_node(int nid)
> */
> node_set_offline(nid);
> unregister_one_node(nid);
> +
> + if (!PageSlab(pgdat_page)&& !PageCompound(pgdat_page))
> + /* node data is allocated from boot memory */
> + return;
> +
> + /* free waittable in each zone */
> + for (i = 0; i< MAX_NR_ZONES; i++) {
> + struct zone *zone = pgdat->node_zones + i;
> +
> + if (zone->wait_table)
> + vfree(zone->wait_table);
> + }
> +
> + arch_refresh_nodedata(nid, NULL);
> + arch_free_nodedata(pgdat);
> }
>
> int __ref remove_memory(int nid, u64 start, u64 size)
next prev parent reply other threads:[~2012-12-04 10:11 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
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 [this message]
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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