Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030186AbWA3VZo (ORCPT ); Mon, 30 Jan 2006 16:25:44 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030182AbWA3VZM (ORCPT ); Mon, 30 Jan 2006 16:25:12 -0500 Received: from e31.co.us.ibm.com ([32.97.110.149]:40844 "EHLO e31.co.us.ibm.com") by vger.kernel.org with ESMTP id S1030180AbWA3VYy (ORCPT ); Mon, 30 Jan 2006 16:24:54 -0500 Subject: [patch 1/8] mempool - Add page allocator From: Matthew Dobson Reply-To: colpatch@us.ibm.com To: linux-kernel@vger.kernel.org Cc: penberg@cs.helsinki.fi, akpm@osdl.org References: <20060130211951.225129000@localhost.localdomain> Content-Type: text/plain Organization: IBM LTC Date: Mon, 30 Jan 2006 13:23:37 -0800 Message-Id: <1138656217.20704.1.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.4.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2491 Lines: 68 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 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 */ -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/