kernel/mm/memory_hotplug.c, branch linux-2.6.18.y

[PATCH] memory hotadd fixes: enhance collision check

2006-08-06T15:57:49Z

This patch is for collision check enhancement for memory hot add. It's better to do resouce collision check before doing memory hot add, which will touch memory management structures. And add_section() should check section exists or not before calling sparse_add_one_section(). (sparse_add_one_section() will do another check anyway. but checking in memory_hotplug.c will be easy to understand.) Signed-off-by: KAMEZAWA Hiroyuki Cc: keith mannthey Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] memory hotadd fixes: find_next_system_ram catch range fix

2006-08-06T15:57:48Z

find_next_system_ram() is used to find available memory resource at onlining newly added memory. This patch fixes following problem. find_next_system_ram() cannot catch this case. Resource: (start)-------------(end) Section : (start)-------------(end) Signed-off-by: KAMEZAWA Hiroyuki Cc: Keith Mannthey Cc: Yasunori Goto Cc: Dave Hansen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] memory hotadd fixes: not-aligned memory hotadd handling fix

2006-08-06T15:57:48Z

ioresouce handling code in memory hotplug allows not-aligned memory hot add. But when memmap and other memory structures are initialized, parameters should be aligned. (if not aligned, initialization of mem_map will do wrong, it assumes parameters are aligned.) This patch fix it. And this patch allows ioresource collision check to handle -EEXIST. Signed-off-by: KAMEZAWA Hiroyuki Cc: Keith Mannthey Cc: Yasunori Goto Cc: Dave Hansen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Remove obsolete #include

2006-06-30T17:25:36Z

Signed-off-by: Jörn Engel Signed-off-by: Adrian Bunk

[PATCH] Register sysfs file for hotplugged new node

2006-06-28T00:32:36Z

When new node becomes enable by hot-add, new sysfs file must be created for new node. So, if new node is enabled by add_memory(), register_one_node() is called to create it. In addition, I386's arch_register_node() and a part of register_nodes() of powerpc are consolidated to register_one_node() as a generic_code(). This is tested by Tiger4(IPF) with node hot-plug emulation. Signed-off-by: Keiichiro Tokunaga Signed-off-by: Yasunori Goto Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] catch valid mem range at onlining memory

2006-06-28T00:32:36Z

This patch allows hot-add memory which is not aligned to section. Now, hot-added memory has to be aligned to section size. Considering big section sized archs, this is not useful. When hot-added memory is registerd as iomem resoruce by iomem resource patch, we can make use of that information to detect valid memory range. Note: With this, not-aligned memory can be registerd. To allow hot-add memory with holes, we have to do more work around add_memory(). (It doesn't allows add memory to already existing mem section.) Signed-off-by: KAMEZAWA Hiroyuki Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] register hot-added memory to iomem resource

2006-06-28T00:32:36Z

Register hot-added memory to iomem_resource. With this, /proc/iomem can show hot-added memory. Note: kdump uses /proc/iomem to catch memory range when it is installed. So, kdump should be re-installed after /proc/iomem change. Signed-off-by: KAMEZAWA Hiroyuki Cc: Vivek Goyal Cc: Greg KH Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] pgdat allocation for new node add (call pgdat allocation)

2006-06-28T00:32:36Z

Add node-hot-add support to add_memory(). node hotadd uses this sequence. 1. allocate pgdat. 2. refresh NODE_DATA() 3. call free_area_init_node() to initialize 4. create sysfs entry 5. add memory (old add_memory()) 6. set node online 7. run kswapd for new node. (8). update zonelist after pages are onlined. (This is already merged in -mm due to update phase is difference.) Note: To make common function as much as possible, there is 2 changes from v2. - The old add_memory(), which is defiend by each archs, is renamed to arch_add_memory(). New add_memory becomes caller of arch dependent function as a common code. - This patch changes add_memory()'s interface From: add_memory(start, end) TO : add_memory(nid, start, end). It was cause of similar code that finding node id from physical address is inside of old add_memory() on each arch. In addition, acpi memory hotplug driver can find node id easier. In v2, it must walk DSDT'S _CRS by matching physical address to get the handle of its memory device, then get _PXM and node id. Because input is just physical address. However, in v3, the acpi driver can use handle to get _PXM and node id for the new memory device. It can pass just node id to add_memory(). Fix interface of arch_add_memory() is in next patche. Signed-off-by: Yasunori Goto Signed-off-by: KAMEZAWA Hiroyuki Cc: Dave Hansen Cc: "Brown, Len" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] pgdat allocation for new node add (specify node id)

2006-06-28T00:32:35Z

Change the name of old add_memory() to arch_add_memory. And use node id to get pgdat for the node at NODE_DATA(). Note: Powerpc's old add_memory() is defined as __devinit. However, add_memory() is usually called only after bootup. I suppose it may be redundant. But, I'm not well known about powerpc. So, I keep it. (But, __meminit is better at least.) Signed-off-by: Yasunori Goto Cc: Dave Hansen Cc: "Brown, Len" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] update vm_total_pages at memory hotadd

2006-06-23T14:42:52Z

Signed-off-by: KAMEZAWA Hiroyuki Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds