Messages in this thread Patch in this message | | | Subject | [patch 1/8] mempool - Add page allocator | From | Matthew Dobson <> | Date | Mon, 30 Jan 2006 13:23:37 -0800 |
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plain text document attachment (mempool-add_page_allocator.patch) Add an allocator to the common mempool code: a simple page allocator
This will be used by the next patch in the series to replace duplicate mempool-backed page allocators in 2 places in the kernel. It is also likely that there will be more users in the future.
Signed-off-by: Matthew Dobson <colpatch@us.ibm.com>
include/linux/mempool.h | 12 ++++++++++++ mm/mempool.c | 18 ++++++++++++++++++ 2 files changed, 30 insertions(+)
Index: linux-2.6.16-rc1-mm4+mempool_work/mm/mempool.c =================================================================== --- linux-2.6.16-rc1-mm4+mempool_work.orig/mm/mempool.c +++ linux-2.6.16-rc1-mm4+mempool_work/mm/mempool.c @@ -289,3 +289,21 @@ void mempool_free_slab(void *element, vo kmem_cache_free(mem, element); } EXPORT_SYMBOL(mempool_free_slab); + +/* + * A simple mempool-backed page allocator that allocates pages + * of the order specified by pool_data. + */ +void *mempool_alloc_pages(gfp_t gfp_mask, void *pool_data) +{ + int order = (int) pool_data; + return alloc_pages(gfp_mask, order); +} +EXPORT_SYMBOL(mempool_alloc_pages); + +void mempool_free_pages(void *element, void *pool_data) +{ + int order = (int) pool_data; + __free_pages(element, order); +} +EXPORT_SYMBOL(mempool_free_pages); Index: linux-2.6.16-rc1-mm4+mempool_work/include/linux/mempool.h =================================================================== --- linux-2.6.16-rc1-mm4+mempool_work.orig/include/linux/mempool.h +++ linux-2.6.16-rc1-mm4+mempool_work/include/linux/mempool.h @@ -38,4 +38,16 @@ extern void mempool_free(void *element, void *mempool_alloc_slab(gfp_t gfp_mask, void *pool_data); void mempool_free_slab(void *element, void *pool_data); +/* + * A mempool_alloc_t and mempool_free_t for a simple page allocator that + * allocates pages of the order specified by pool_data + */ +void *mempool_alloc_pages(gfp_t gfp_mask, void *pool_data); +void mempool_free_pages(void *element, void *pool_data); +static inline mempool_t *mempool_create_page_pool(int min_nr, int order) +{ + return mempool_create(min_nr, mempool_alloc_pages, mempool_free_pages, + (void *) order); +} + #endif /* _LINUX_MEMPOOL_H */ --
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