From: Nathan Fontenot Date: Sun, 19 Oct 2008 03:27:14 +0000 (-0700) Subject: memory hotplug: release memory regions in PAGES_PER_SECTION chunks X-Git-Tag: firefly_0821_release~17315 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=de7f0cba9678;p=firefly-linux-kernel-4.4.55.git memory hotplug: release memory regions in PAGES_PER_SECTION chunks During hotplug memory remove, memory regions should be released on a PAGES_PER_SECTION size chunks. This mirrors the code in add_memory where resources are requested on a PAGES_PER_SECTION size. Attempting to release the entire memory region fails because there is not a single resource for the total number of pages being removed. Instead the resources for the pages are split in PAGES_PER_SECTION size chunks as requested during memory add. Signed-off-by: Nathan Fontenot Signed-off-by: Badari Pulavarty Acked-by: Yasunori Goto Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 3b4975815141..6837a1014372 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -324,11 +324,11 @@ int __remove_pages(struct zone *zone, unsigned long phys_start_pfn, BUG_ON(phys_start_pfn & ~PAGE_SECTION_MASK); BUG_ON(nr_pages % PAGES_PER_SECTION); - release_mem_region(phys_start_pfn << PAGE_SHIFT, nr_pages * PAGE_SIZE); - sections_to_remove = nr_pages / PAGES_PER_SECTION; for (i = 0; i < sections_to_remove; i++) { unsigned long pfn = phys_start_pfn + i*PAGES_PER_SECTION; + release_mem_region(pfn << PAGE_SHIFT, + PAGES_PER_SECTION << PAGE_SHIFT); ret = __remove_section(zone, __pfn_to_section(pfn)); if (ret) break;