On 12/26/2012 11:47 AM, Kamezawa Hiroyuki wrote:
> (2012/12/24 21:09), Tang Chen wrote:
>> In __remove_section(), we locked pgdat_resize_lock when calling
>> sparse_remove_one_section(). This lock will disable irq. But we don't need
>> to lock the whole function. If we do some work to free pagetabl
(2012/12/24 21:09), Tang Chen wrote:
> From: Wen Congyang
>
> We call hotadd_new_pgdat() to allocate memory to store node_data. So we
> should free it when removing a node.
>
> Signed-off-by: Wen Congyang
I'm sorry but is it safe to remove pgdat ? All zone cache and zonelists are
properly clea
(2012/12/24 21:09), Tang Chen wrote:
> In __remove_section(), we locked pgdat_resize_lock when calling
> sparse_remove_one_section(). This lock will disable irq. But we don't need
> to lock the whole function. If we do some work to free pagetables in
> free_section_usemap(), we need to call flush_t
(2012/12/24 21:09), Tang Chen wrote:
> From: Wen Congyang
>
> memory can't be offlined when CONFIG_MEMCG is selected.
> For example: there is a memory device on node 1. The address range
> is [1G, 1.5G). You will find 4 new directories memory8, memory9, memory10,
> and memory11 under the director
(2012/12/24 21:09), Tang Chen wrote:
> From: Wen Congyang
>
> For removing memory, we need to remove page table. But it depends
> on architecture. So the patch introduce arch_remove_memory() for
> removing page table. Now it only calls __remove_pages().
>
> Note: __remove_pages() for some archte
(2012/12/24 21:09), Tang Chen wrote:
> From: Yasuaki Ishimatsu
>
> When (hot)adding memory into system, /sys/firmware/memmap/X/{end, start, type}
> sysfs files are created. But there is no code to remove these files. The patch
> implements the function to remove them.
>
> Note: The code does not
On 12/25/2012 04:09 PM, Jianguo Wu wrote:
+
+ if (!cpu_has_pse) {
+ next = (addr + PAGE_SIZE)& PAGE_MASK;
+ pmd = pmd_offset(pud, addr);
+ if (pmd_none(*pmd))
+ continue;
+
(2012/12/24 21:09), Tang Chen wrote:
> From: Wen Congyang
>
> offlining memory blocks and checking whether memory blocks are offlined
> are very similar. This patch introduces a new function to remove
> redundant codes.
>
> Signed-off-by: Wen Congyang
> ---
> mm/memory_hotplug.c | 101
> +++
On 12/26/2012 11:11 AM, Tang Chen wrote:
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 reserv
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)) {
+ _
(2012/12/24 21:09), Tang Chen wrote:
> From: Yasuaki Ishimatsu
>
> We remove the memory like this:
> 1. lock memory hotplug
> 2. offline a memory block
> 3. unlock memory hotplug
> 4. repeat 1-3 to offline all memory blocks
> 5. lock memory hotplug
> 6. remove memory(TODO)
> 7. unlock memory hotp
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)) {
+
On 12/24/2012 04:09 PM, Tang Chen wrote:
> From: Wen Congyang
>
> memory can't be offlined when CONFIG_MEMCG is selected.
> For example: there is a memory device on node 1. The address range
> is [1G, 1.5G). You will find 4 new directories memory8, memory9, memory10,
> and memory11 under the dire
On 2012/12/24 20:09, Tang Chen wrote:
> From: Wen Congyang
>
> When memory is removed, the corresponding pagetables should alse be removed.
> This patch introduces some common APIs to support vmemmap pagetable and x86_64
> architecture pagetable removing.
>
> All pages of virtual mapping in rem
On 2012/12/24 20:09, Tang Chen wrote:
> From: Yasuaki Ishimatsu
>
> For removing memmap region of sparse-vmemmap which is allocated bootmem,
> memmap region of sparse-vmemmap needs to be registered by get_page_bootmem().
> So the patch searches pages of virtual mapping and registers the pages by
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