Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753268Ab3CXH2H (ORCPT ); Sun, 24 Mar 2013 03:28:07 -0400 Received: from mail-pb0-f48.google.com ([209.85.160.48]:42536 "EHLO mail-pb0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753060Ab3CXH2E (ORCPT ); Sun, 24 Mar 2013 03:28:04 -0400 From: Jiang Liu To: Andrew Morton , David Rientjes Cc: Jiang Liu , Wen Congyang , Mel Gorman , Minchan Kim , KAMEZAWA Hiroyuki , Michal Hocko , Jianguo Wu , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Michel Lespinasse , Rik van Riel , Marek Szyprowski Subject: [RFC PATCH v2, part4 08/39] mm: introduce helper function mem_init_print_info() to simplify mem_init() Date: Sun, 24 Mar 2013 15:24:34 +0800 Message-Id: <1364109934-7851-9-git-send-email-jiang.liu@huawei.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1364109934-7851-1-git-send-email-jiang.liu@huawei.com> References: <1364109934-7851-1-git-send-email-jiang.liu@huawei.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4458 Lines: 133 Introduce helper function mem_init_print_info() to simplify mem_init() across different architectures, which also unifies the format and information printed. Function mem_init_print_info() calculates memory statistics information without walking each page, so it should be a little faster on some architectures. Also introduce another helper get_num_physpages() to kill the global variable num_physpages. Signed-off-by: Jiang Liu Cc: Andrew Morton Cc: Mel Gorman Cc: Michel Lespinasse Cc: Rik van Riel Cc: Minchan Kim Cc: Marek Szyprowski Cc: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org --- include/linux/mm.h | 12 ++++++++++++ mm/page_alloc.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 64 insertions(+) diff --git a/include/linux/mm.h b/include/linux/mm.h index c03d029..c225a4f 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1312,6 +1312,7 @@ extern void free_highmem_page(struct page *page); #endif extern void adjust_managed_page_count(struct page *page, long count); +extern void mem_init_print_info(const char *str); /* Free the reserved page into the buddy system, so it gets managed. */ static inline void __free_reserved_page(struct page *page) @@ -1348,6 +1349,17 @@ static inline unsigned long free_initmem_default(int poison) poison, "unused kernel"); } +static inline unsigned long get_num_physpages(void) +{ + int nid; + unsigned long phys_pages = 0; + + for_each_online_node(nid) + phys_pages += node_present_pages(nid); + + return phys_pages; +} + #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP /* * With CONFIG_HAVE_MEMBLOCK_NODE_MAP set, an architecture may initialise its diff --git a/mm/page_alloc.c b/mm/page_alloc.c index ebfb042..577acec 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -59,6 +59,7 @@ #include #include +#include #include #include #include "internal.h" @@ -5168,6 +5169,57 @@ void free_highmem_page(struct page *page) } #endif + +void __init mem_init_print_info(const char *str) +{ + unsigned long physpages, codesize, datasize, rosize; + unsigned long init_code_size, init_data_size; + + physpages = get_num_physpages(); + codesize = _etext - _stext; + datasize = _edata - _sdata; + rosize = __end_rodata - __start_rodata; + init_data_size = __init_end - __init_begin; + init_code_size = _einittext - _sinittext; + + /* + * Detect special cases and adjust section sizes accordingly: + * 1) .init.* may be embedded into .data sections + * 2) .init.text.* may be out of [__init_begin, __init_end], + * please refer to arch/tile/kernel/vmlinux.lds.S. + * 3) .rodata.* may be embedded into .text or .data sections. + */ +#define adj_init_size(start, end, size, pos, adj) \ + if (start <= pos && pos < end && size > adj) \ + size -= adj; + + adj_init_size(__init_begin, __init_end, init_data_size, + _sinittext, init_code_size); + adj_init_size(_stext, _etext, codesize, _sinittext, init_code_size); + adj_init_size(_sdata, _edata, datasize, __init_begin, init_data_size); + adj_init_size(_stext, _etext, codesize, __start_rodata, rosize); + adj_init_size(_sdata, _edata, datasize, __start_rodata, rosize); + +#undef adj_init_size + + printk("Memory: %luK/%luK available " + "(%luK kernel code, %luK data, %luK rodata, " + "%luK init, %luK bss, %luK reserved" +#ifdef CONFIG_HIGHMEM + ", %luK highmem" +#endif + "%s%s)\n", + nr_free_pages() << (PAGE_SHIFT-10), physpages << (PAGE_SHIFT-10), + codesize >> 10, datasize >> 10, rosize >> 10, + (init_data_size + init_code_size) >> 10, + (__bss_stop - __bss_start) >> 10, + (physpages - totalram_pages) << (PAGE_SHIFT-10), +#ifdef CONFIG_HIGHMEM + totalhigh_pages << (PAGE_SHIFT-10), +#endif + str ? ", " : "", str ? str : ""); +} + /** * set_dma_reserve - set the specified number of pages reserved in the first zone * @new_dma_reserve: The number of pages to mark reserved -- 1.7.9.5 -- 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/