user/sven/linux.git/include/linux/bootmem.h, branch v3.14.33

memblock, bootmem: restore goal for alloc_low

2014-01-31T00:56:54Z

Now we have memblock_virt_alloc_low to replace original bootmem api in swiotlb. But we should not use BOOTMEM_LOW_LIMIT for arch that does not support CONFIG_NOBOOTMEM, as old api take 0. | #define alloc_bootmem_low(x) \ | __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0) |#define alloc_bootmem_low_pages_nopanic(x) \ | __alloc_bootmem_low_nopanic(x, PAGE_SIZE, 0) and we have #define BOOTMEM_LOW_LIMIT __pa(MAX_DMA_ADDRESS) for CONFIG_NOBOOTMEM. Restore goal to 0 to fix ia64 crash, that Tony found. Signed-off-by: Yinghai Lu Reported-by: Tony Luck Tested-by: Tony Luck Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

memblock, nobootmem: add memblock_virt_alloc_low()

2014-01-28T05:02:38Z

The new memblock_virt APIs are used to replaced old bootmem API. We need to allocate page below 4G for swiotlb. That should fix regression on Andrew's system that is using swiotlb. Signed-off-by: Yinghai Lu Cc: Russell King Cc: Konrad Rzeszutek Wilk Acked-by: Santosh Shilimkar Cc: Dave Hansen Cc: Ingo Molnar Cc: "H. Peter Anvin" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm/memblock: add memblock memory allocation apis

2014-01-22T00:19:46Z

Introduce memblock memory allocation APIs which allow to support PAE or LPAE extension on 32 bits archs where the physical memory start address can be beyond 4GB. In such cases, existing bootmem APIs which operate on 32 bit addresses won't work and needs memblock layer which operates on 64 bit addresses. So we add equivalent APIs so that we can replace usage of bootmem with memblock interfaces. Architectures already converted to NO_BOOTMEM use these new memblock interfaces. The architectures which are still not converted to NO_BOOTMEM continue to function as is because we still maintain the fal lback option of bootmem back-end supporting these new interfaces. So no functional change as such. In long run, once all the architectures moves to NO_BOOTMEM, we can get rid of bootmem layer completely. This is one step to remove the core code dependency with bootmem and also gives path for architectures to move away from bootmem. The proposed interface will became active if both CONFIG_HAVE_MEMBLOCK and CONFIG_NO_BOOTMEM are specified by arch. In case !CONFIG_NO_BOOTMEM, the memblock() wrappers will fallback to the existing bootmem apis so that arch's not converted to NO_BOOTMEM continue to work as is. The meaning of MEMBLOCK_ALLOC_ACCESSIBLE and MEMBLOCK_ALLOC_ANYWHERE is kept same. [akpm@linux-foundation.org: s/depricated/deprecated/] Signed-off-by: Grygorii Strashko Signed-off-by: Santosh Shilimkar Cc: Yinghai Lu Cc: Tejun Heo Cc: "Rafael J. Wysocki" Cc: Arnd Bergmann Cc: Christoph Lameter Cc: Greg Kroah-Hartman Cc: H. Peter Anvin Cc: Johannes Weiner Cc: KAMEZAWA Hiroyuki Cc: Konrad Rzeszutek Wilk Cc: Michal Hocko Cc: Paul Walmsley Cc: Pavel Machek Cc: Russell King Cc: Tony Lindgren Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm/bootmem: remove duplicated declaration of __free_pages_bootmem()

2014-01-22T00:19:46Z

The __free_pages_bootmem is used internally by MM core and already defined in internal.h. So, remove duplicated declaration. Signed-off-by: Grygorii Strashko Signed-off-by: Santosh Shilimkar Reviewed-by: Tejun Heo Cc: Yinghai Lu Cc: "Rafael J. Wysocki" Cc: Arnd Bergmann Cc: Christoph Lameter Cc: Greg Kroah-Hartman Cc: H. Peter Anvin Cc: Johannes Weiner Cc: KAMEZAWA Hiroyuki Cc: Konrad Rzeszutek Wilk Cc: Michal Hocko Cc: Paul Walmsley Cc: Pavel Machek Cc: Russell King Cc: Tony Lindgren Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm: kill free_all_bootmem_node()

2013-07-03T23:07:39Z

Now nobody makes use of free_all_bootmem_node(), kill it. Signed-off-by: Jiang Liu Cc: Johannes Weiner Cc: "David S. Miller" Cc: Yinghai Lu Acked-by: Tejun Heo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm: accurately calculate zone->managed_pages for highmem zones

2013-07-03T23:07:33Z

Commit "mm: introduce new field 'managed_pages' to struct zone" assumes that all highmem pages will be freed into the buddy system by function mem_init(). But that's not always true, some architectures may reserve some highmem pages during boot. For example PPC may allocate highmem pages for giagant HugeTLB pages, and several architectures have code to check PageReserved flag to exclude highmem pages allocated during boot when freeing highmem pages into the buddy system. So treat highmem pages in the same way as normal pages, that is to: 1) reset zone->managed_pages to zero in mem_init(). 2) recalculate managed_pages when freeing pages into the buddy system. Signed-off-by: Jiang Liu Cc: "H. Peter Anvin" Cc: Tejun Heo Cc: Joonsoo Kim Cc: Yinghai Lu Cc: Mel Gorman Cc: Minchan Kim Cc: Kamezawa Hiroyuki Cc: Marek Szyprowski Cc: "Michael S. Tsirkin" Cc: Cc: Arnd Bergmann Cc: Catalin Marinas Cc: Chris Metcalf Cc: David Howells Cc: Geert Uytterhoeven Cc: Ingo Molnar Cc: Jeremy Fitzhardinge Cc: Jianguo Wu Cc: Konrad Rzeszutek Wilk Cc: Michel Lespinasse Cc: Rik van Riel Cc: Rusty Russell Cc: Tang Chen Cc: Thomas Gleixner Cc: Wen Congyang Cc: Will Deacon Cc: Yasuaki Ishimatsu Cc: Russell King Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm, nobootmem: clean-up of free_low_memory_core_early()

2013-04-29T22:54:39Z

Remove unused argument and make function static, because there is no user outside of nobootmem.c Signed-off-by: Joonsoo Kim Cc: Yinghai Lu Acked-by: Johannes Weiner Cc: Jiang Liu Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

memory-hotplug: common APIs to support page tables hot-remove

2013-02-24T01:50:12Z

When memory is removed, the corresponding pagetables should alse be removed. This patch introduces some common APIs to support vmemmap pagetable and x86_64 architecture direct mapping pagetable removing. All pages of virtual mapping in removed memory cannot be freed if some pages used as PGD/PUD include not only removed memory but also other memory. So this patch uses the following way to check whether a page can be freed or not. 1) When removing memory, the page structs of the removed memory are filled with 0FD. 2) All page structs are filled with 0xFD on PT/PMD, PT/PMD can be cleared. In this case, the page used as PT/PMD can be freed. For direct mapping pages, update direct_pages_count[level] when we freed their pagetables. And do not free the pages again because they were freed when offlining. For vmemmap pages, free the pages and their pagetables. For larger pages, do not split them into smaller ones because there is no way to know if the larger page has been split. As a result, there is no way to decide when to split. We deal the larger pages in the following way: 1) For direct mapped pages, all the pages were freed when they were offlined. And since menmory offline is done section by section, all the memory ranges being removed are aligned to PAGE_SIZE. So only need to deal with unaligned pages when freeing vmemmap pages. 2) For vmemmap pages being used to store page_struct, if part of the larger page is still in use, just fill the unused part with 0xFD. And when the whole page is fulfilled with 0xFD, then free the larger page. [akpm@linux-foundation.org: fix typo in comment] [tangchen@cn.fujitsu.com: do not calculate direct mapping pages when freeing vmemmap pagetables] [tangchen@cn.fujitsu.com: do not free direct mapping pages twice] [tangchen@cn.fujitsu.com: do not free page split from hugepage one by one] [tangchen@cn.fujitsu.com: do not split pages when freeing pagetable pages] [akpm@linux-foundation.org: use pmd_page_vaddr()] [akpm@linux-foundation.org: fix used-uninitialised bug] Signed-off-by: Yasuaki Ishimatsu Signed-off-by: Jianguo Wu Signed-off-by: Wen Congyang Signed-off-by: Tang Chen Cc: KOSAKI Motohiro Cc: Jiang Liu Cc: Kamezawa Hiroyuki Cc: Lai Jiangshan Cc: Wu Jianguo Cc: Ingo Molnar Cc: Thomas Gleixner Cc: "H. Peter Anvin" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm: Add alloc_bootmem_low_pages_nopanic()

2013-01-30T03:32:59Z

We don't need to panic in some case, like for swiotlb preallocating. Signed-off-by: Yinghai Lu Link: http://lkml.kernel.org/r/1359058816-7615-35-git-send-email-yinghai@kernel.org Signed-off-by: H. Peter Anvin

mm/bootmem.c: remove unused wrapper function reserve_bootmem_generic()

2012-12-13T01:38:35Z

reserve_bootmem_generic() has no caller, Signed-off-by: Lin Feng Acked-by: Johannes Weiner Cc: Yinghai Lu Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds