From: Tang Chen <tangchen@cn.fujitsu.com>
To: Jianguo Wu <wujianguo@huawei.com>
Cc: linux-ia64@vger.kernel.org, linux-sh@vger.kernel.org,
linux-mm@kvack.org, paulus@samba.org, hpa@zytor.com,
sparclinux@vger.kernel.org, cl@linux.com,
linux-s390@vger.kernel.org, x86@kernel.org,
linux-acpi@vger.kernel.org, isimatu.yasuaki@jp.fujitsu.com,
linfeng@cn.fujitsu.com, mgorman@suse.de,
kosaki.motohiro@jp.fujitsu.com, rientjes@google.com,
liuj97@gmail.com, len.brown@intel.com, wency@cn.fujitsu.com,
cmetcalf@tilera.com, yinghai@kernel.org, laijs@cn.fujitsu.com,
linux-kernel@vger.kernel.org, minchan.kim@gmail.com,
akpm@linux-foundation.org, linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH v5 08/14] memory-hotplug: Common APIs to support page tables hot-remove
Date: Wed, 26 Dec 2012 11:11:01 +0800 [thread overview]
Message-ID: <50DA6AC5.4020904@cn.fujitsu.com> (raw)
In-Reply-To: <50DA65B7.2050707@cn.fujitsu.com>
On 12/26/2012 10:49 AM, Tang Chen wrote:
> On 12/25/2012 04:17 PM, Jianguo Wu wrote:
>>> +
>>> +static void __meminit free_pagetable(struct page *page, int order)
>>> +{
>>> + struct zone *zone;
>>> + bool bootmem = false;
>>> + unsigned long magic;
>>> +
>>> + /* bootmem page has reserved flag */
>>> + if (PageReserved(page)) {
>>> + __ClearPageReserved(page);
>>> + bootmem = true;
>>> +
>>> + magic = (unsigned long)page->lru.next;
>>> + if (magic == SECTION_INFO || magic == MIX_SECTION_INFO)
And also, I think we don't need to check MIX_SECTION_INFO since it is
for the pageblock_flags, not the memmap in the section.
Thanks. :)
>>> + put_page_bootmem(page);
>>
>> Hi Tang,
>>
>> For removing memmap of sparse-vmemmap, in cpu_has_pse case, if magic
>> == SECTION_INFO,
>> the order will be get_order(PMD_SIZE), so we need a loop here to put
>> all the 512 pages.
>>
> Hi Wu,
>
> Thanks for reminding me that. I truely missed it.
>
> And since in register_page_bootmem_info_section(), a whole memory
> section will be set as SECTION_INFO, I think we don't need to check
> the page magic one by one, just the first one is enough. :)
>
> I will fix it, thanks. :)
>
> --
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>
next prev parent reply other threads:[~2012-12-26 3:11 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-24 12:09 [PATCH v5 00/14] memory-hotplug: hot-remove physical memory Tang Chen
2012-12-24 12:09 ` [PATCH v5 01/14] memory-hotplug: try to offline the memory twice to avoid dependence Tang Chen
2012-12-25 8:35 ` Glauber Costa
2012-12-30 5:58 ` Wen Congyang
2013-01-09 15:09 ` Glauber Costa
2013-01-10 1:38 ` Tang Chen
2013-02-06 3:07 ` Tang Chen
2013-02-06 9:17 ` Tang Chen
2013-02-06 10:10 ` Tang Chen
2013-02-06 14:24 ` Glauber Costa
2013-02-07 7:56 ` Tang Chen
2012-12-26 3:02 ` Kamezawa Hiroyuki
2012-12-30 5:49 ` Wen Congyang
2012-12-24 12:09 ` [PATCH v5 02/14] memory-hotplug: check whether all memory blocks are offlined or not when removing memory Tang Chen
2012-12-26 3:10 ` Kamezawa Hiroyuki
2012-12-27 3:10 ` Tang Chen
2012-12-24 12:09 ` [PATCH v5 03/14] memory-hotplug: remove redundant codes Tang Chen
2012-12-26 3:20 ` Kamezawa Hiroyuki
2012-12-27 3:09 ` Tang Chen
2012-12-24 12:09 ` [PATCH v5 04/14] memory-hotplug: remove /sys/firmware/memmap/X sysfs Tang Chen
2012-12-26 3:30 ` Kamezawa Hiroyuki
2012-12-27 3:09 ` Tang Chen
2013-01-02 14:24 ` Christoph Lameter
2012-12-24 12:09 ` [PATCH v5 05/14] memory-hotplug: introduce new function arch_remove_memory() for removing page table depends on architecture Tang Chen
2012-12-26 3:37 ` Kamezawa Hiroyuki
2012-12-24 12:09 ` [PATCH v5 06/14] memory-hotplug: implement register_page_bootmem_info_section of sparse-vmemmap Tang Chen
2012-12-25 8:09 ` Jianguo Wu
2012-12-26 3:21 ` Tang Chen
2012-12-24 12:09 ` [PATCH v5 07/14] memory-hotplug: move pgdat_resize_lock into sparse_remove_one_section() Tang Chen
2012-12-26 3:47 ` Kamezawa Hiroyuki
2012-12-26 6:20 ` Tang Chen
2012-12-24 12:09 ` [PATCH v5 08/14] memory-hotplug: Common APIs to support page tables hot-remove Tang Chen
2012-12-25 8:17 ` Jianguo Wu
2012-12-26 2:49 ` Tang Chen
2012-12-26 3:11 ` Tang Chen [this message]
2012-12-26 3:19 ` Tang Chen
2012-12-24 12:09 ` [PATCH v5 09/14] memory-hotplug: remove page table of x86_64 architecture Tang Chen
2012-12-24 12:09 ` [PATCH v5 10/14] memory-hotplug: remove memmap of sparse-vmemmap Tang Chen
2012-12-24 12:09 ` [PATCH v5 11/14] memory-hotplug: Integrated __remove_section() of CONFIG_SPARSEMEM_VMEMMAP Tang Chen
2012-12-24 12:09 ` [PATCH v5 12/14] memory-hotplug: memory_hotplug: clear zone when removing the memory Tang Chen
2012-12-24 12:09 ` [PATCH v5 13/14] memory-hotplug: remove sysfs file of node Tang Chen
2012-12-24 12:09 ` [PATCH v5 14/14] memory-hotplug: free node_data when a node is offlined Tang Chen
2012-12-26 3:55 ` Kamezawa Hiroyuki
2012-12-27 12:16 ` Wen Congyang
2012-12-28 0:28 ` Kamezawa Hiroyuki
2012-12-30 6:02 ` Wen Congyang
2013-01-07 5:30 ` Kamezawa Hiroyuki
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