Messages in this thread | | | From | David Hildenbrand <> | Subject | [PATCH v1 00/11] mm/memory_hotplug: online_pages()/offline_pages() cleanups | Date | Wed, 19 Aug 2020 12:11:46 +0200 |
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These are a bunch of cleanups for online_pages()/offline_pages() and related code, mostly getting rid of memory hole handling that is no longer necessary. There is only a single walk_system_ram_range() call left in offline_pages(), to make sure we don't have any memory holes. I had some of these patches lying around for a longer time but didn't have time to polish them.
In addition, the last patch marks all pageblocks of memory to get onlined MIGRATE_ISOLATE, so pages that have just been exposed to the buddy cannot get allocated before onlining is complete. Once heavy lifting is done, the pageblocks are set to MIGRATE_MOVABLE, such that allocations are possible.
I played with DIMMs and virtio-mem on x86-64 and didn't spot any surprises. I verified that the numer of isolated pageblocks is correctly handled when onlining/offlining.
David Hildenbrand (11): mm/memory_hotplug: inline __offline_pages() into offline_pages() mm/memory_hotplug: enforce section granularity when onlining/offlining mm/memory_hotplug: simplify checking if all pages are isolated in offline_pages() mm/memory_hotplug: simplify offlining of pages in offline_pages() mm/page_alloc: simplify __offline_isolated_pages() mm/memory_hotplug: drop nr_isolate_pageblock in offline_pages() mm/page_isolation: simplify return value of start_isolate_page_range() mm/memory_hotplug: simplify page onlining mm/page_alloc: drop stale pageblock comment in memmap_init_zone*() mm: pass migratetype into memmap_init_zone() and move_pfn_range_to_zone() mm/memory_hotplug: mark pageblocks MIGRATE_ISOLATE while onlining memory
arch/ia64/mm/init.c | 4 +- include/linux/memory_hotplug.h | 7 +- include/linux/mm.h | 3 +- mm/Kconfig | 2 +- mm/memory_hotplug.c | 156 ++++++++++++++------------------- mm/memremap.c | 3 +- mm/page_alloc.c | 64 ++++---------- mm/page_isolation.c | 7 +- 8 files changed, 98 insertions(+), 148 deletions(-)
-- 2.26.2
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