Messages in this thread | | | Date | Wed, 08 Mar 2006 22:41:03 +0900 | From | Yasunori Goto <> | Subject | [PATCH: 000/017] (RFC)Memory hotplug for new nodes v.3. |
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Hello.
I'll post newest patches for memory hotadd with pgdat allocation as V3. There are many changes to make more common code.
This may be too many patches, but I would like to show total feature of this code now.
This patches are for 2.6.16-rc5-mm3. I tested these patch on just Tiger4(ia64) with emulation now. But, I'll test them for x86-64 too after this post.
Please comment.
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This is memory hotadd code when new node is added. In this patch, pgdat is allocated when new node is comming. To initialize pgdat and zones, a set of patches are necessary. - to allcate and initialize pgdat, zone, zonelist. - to make new kswapd - to initialize node_data[] array (ia64) - to register sysfs file for new node. - to call memory_hotplug code from acpi container driver.
Note: - kzalloc is used for pgdat allocation in this version. So, even if pgdat is allocated, it will be allocated on the other node. This is only to simplify patches a bit. :-P
----------------------------- Followings are updates.
Updates from V2 to V3. - update for 2.6.16-rc5-mm3. - The caller function of pgdat allcation and so on become common code. - Passing node id at add_memory(). - build_zonelists() is called after that pages are onlined. - Updating NODE_DATA() for ia64 become simple and become common code between booting and hotadd. (But other consideration will be necessary for hot-remove.) - kswapd is called by kthread_run(). - finding node id by acpi use handle of its memory device. -
Updates from V1 to V2. - update for 2.6.16-rc5-mm2. - not only ia64, This is tested on x86_64 with NUMA emulation too. :-) - wait_table_size() allcation is changed. - Take max size as much as possible. - Change using GFP_ATOMIC. It is inside of zone_init_lock. (Warining message of might_sleep() is very well.) - stop_machine_run(build_zonelists) is move to outside of lock. - pgdat_insert() is moved to generic code to be used by x86_64. - add decision of ZONE_DMA32 or ZONE_NORMAL to x86_64's add_memory(). - Make a separated patch to change from __init to __meminit. - Fix some typo
-- Yasunori Goto
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