- 27 Jun, 2006 5 commits
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Yasunori Goto authored
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 <tokuanga.keiich@jp.fujitsu.com> Signed-off-by:
Yasunori Goto <y-goto@jp.fujitsu.com> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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KAMEZAWA Hiroyuki authored
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 <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by:
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KAMEZAWA Hiroyuki authored
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: -
Yasunori Goto authored
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 authored
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:
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- 23 Jun, 2006 3 commits
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KAMEZAWA Hiroyuki authored
Signed-off-by:
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Yasunori Goto authored
In current code, zonelist is considered to be build once, no modification. But MemoryHotplug can add new zone/pgdat. It must be updated. This patch modifies build_all_zonelists(). By this, build_all_zonelist() can reconfig pgdat's zonelists. To update them safety, this patch use stop_machine_run(). Other cpus don't touch among updating them by using it. In old version (V2 of node hotadd), kernel updated them after zone initialization. But present_page of its new zone is still 0, because online_page() is not called yet at this time. Build_zonelists() checks present_pages to find present zone. It was too early. So, I changed it after online_pages(). Signed-off-by:
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Yasunori Goto authored
[PATCH] wait_table and zonelist initializing for memory hotadd: add return code for init_current_empty_zone When add_zone() is called against empty zone (not populated zone), we have to initialize the zone which didn't initialize at boot time. But, init_currently_empty_zone() may fail due to allocation of wait table. So, this patch is to catch its error code. Changes against wait_table is in the next patch. Signed-off-by:
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- 31 May, 2006 1 commit
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Yasunori Goto authored
From: Yasunori Goto <y-goto@jp.fujitsu.com> If hot-added memory's address is smaller than old area, spanned_pages will not be updated. It must be fixed. example) Old zone_start_pfn = 0x60000, and spanned_pages = 0x10000 Added new memory's start_pfn = 0x50000, and end_pfn = 0x60000 new spanned_pages will be still 0x10000 by old code. (It should be updated to 0x20000.) Because old_zone_end_pfn will be 0x70000, and end_pfn smaller than it. So, spanned_pages will not be updated. In current code, spanned_pages is updated only when end_pfn is updated. But, it should be updated by subtraction between bigger end_pfn and new zone_start_pfn. Signed-off-by:Dave Hansen <haveblue@us.ibm.com> Signed-off-by:
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- 01 May, 2006 1 commit
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Joel H Schopp authored
Based on an older patch from Mike Kravetz <kravetz@us.ibm.com> We need to have a mem_map for high addresses in order to make fops->no_page work on spufs mem and register files. So far, we have used the memory_present() function during early bootup, but that did not work when CONFIG_NUMA was enabled. We now use the __add_pages() function to add the mem_map when loading the spufs module, which is a lot nicer. Signed-off-by:
Arnd Bergmann <arnd.bergmann@de.ibm.com> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by:
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- 09 Mar, 2006 1 commit
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Yasunori Goto authored
When pages are onlined, not only zone->present_pages but also pgdat->node_present_pages should be refreshed. This parameter is used to show information at /sys/device/system/node/nodeX/meminfo via si_meminfo_node(). So, it shows strange value for MemUsed which is calculated (node_present_pages - all zones free pages). Signed-off-by:
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- 06 Jan, 2006 1 commit
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Andy Whitcroft authored
__add_section defines an unused pointer to the zones pgdat. Remove this definition. This fixes a compile warning. Signed-off-by:
Andy Whitcroft <apw@shadowen.org> Signed-off-by:
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- 14 Dec, 2005 1 commit
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Yasunori Goto authored
The calculation for node_spanned_pages at grow_pgdat_span() is clearly wrong. This is patch for it. (Please see grow_zone_span() to compare. It is correct.) Signed-off-by:
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- 30 Oct, 2005 3 commits
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Dave Hansen authored
From: IWAMOTO Toshihiro <iwamoto@valinux.co.jp> > I found the tests does not work well with Dave's patchset. > I've found the followings: > > - setup_per_zone_pages_min() calls should be added in > capture_page_range() and online_pages() > - lru_add_drain() should be called before try_to_migrate_pages() The following patch deals with the first item. Signed-off-by:
IWAMOTO Toshihiro <iwamoto@valinux.co.jp> Signed-off-by:
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Dave Hansen authored
This basically keeps up from having to extern __kmalloc_section_memmap(). The vaddr_in_vmalloc_area() helper could go in a vmalloc header, but that header gets hard to work with, because it needs some arch-specific macros. Just stick it in here for now, instead of creating another header. Signed-off-by:
Lion Vollnhals <webmaster@schiggl.de> Signed-off-by:
Jiri Slaby <xslaby@fi.muni.cz> Signed-off-by:
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Dave Hansen authored
This adds generic memory add/remove and supporting functions for memory hotplug into a new file as well as a memory hotplug kernel config option. Individual architecture patches will follow. For now, disable memory hotplug when swsusp is enabled. There's a lot of churn there right now. We'll fix it up properly once it calms down. Signed-off-by:
Matt Tolentino <matthew.e.tolentino@intel.com> Signed-off-by:
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