06 Aug, 2006
3 commits
-
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 -
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 -
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
01 Jul, 2006
1 commit
-
Signed-off-by: Jörn Engel
Signed-off-by: Adrian Bunk
28 Jun, 2006
5 commits
-
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 -
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 -
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 -
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 -
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
23 Jun, 2006
3 commits
-
Signed-off-by: KAMEZAWA Hiroyuki
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
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: Yasunori Goto
Signed-off-by: KAMEZAWA Hiroyuki
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
…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: KAMEZAWA Hiroyuki <kamezawa.hiroyu@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>
01 Jun, 2006
1 commit
-
From: Yasunori Goto
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 = 0x60000new 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: Yasunori Goto
Signed-off-by: Dave Hansen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
02 May, 2006
1 commit
-
Based on an older patch from Mike Kravetz
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
Cc: Paul Mackerras
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
10 Mar, 2006
1 commit
-
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: Yasunori Goto
Cc: Dave Hansen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
07 Jan, 2006
1 commit
-
__add_section defines an unused pointer to the zones pgdat. Remove this
definition. This fixes a compile warning.Signed-off-by: Andy Whitcroft
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
14 Dec, 2005
1 commit
-
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: Yasunori Goto
Acked-by: Dave Hansen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
30 Oct, 2005
3 commits
-
From: IWAMOTO Toshihiro
> 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
Signed-off-by: Dave Hansen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
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: Dave Hansen
Signed-off-by: Lion Vollnhals
Signed-off-by: Jiri Slaby
Signed-off-by: Yasunori Goto
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
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
Signed-off-by: Dave Hansen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
