Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756088Ab2F0F4B (ORCPT ); Wed, 27 Jun 2012 01:56:01 -0400 Received: from fgwmail5.fujitsu.co.jp ([192.51.44.35]:53753 "EHLO fgwmail5.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750780Ab2F0Fz7 (ORCPT ); Wed, 27 Jun 2012 01:55:59 -0400 X-SecurityPolicyCheck: OK by SHieldMailChecker v1.7.4 Message-ID: <4FEAA05C.6090204@jp.fujitsu.com> Date: Wed, 27 Jun 2012 14:55:40 +0900 From: Yasuaki Ishimatsu User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:13.0) Gecko/20120614 Thunderbird/13.0.1 MIME-Version: 1.0 To: , , , CC: , , , , , , , Subject: [RFC PATCH 9/12] memory-hotplug : implement register_page_bootmem_info_section of sparse-vmemmap References: <4FEA9C88.1070800@jp.fujitsu.com> In-Reply-To: <4FEA9C88.1070800@jp.fujitsu.com> Content-Type: text/plain; charset="ISO-2022-JP" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5520 Lines: 161 For removing memmap region of sparse-vmemmap which is allocated bootmem, memmap region of sparse-vmemmap needs to be registered by get_page_bootmem(). So the patch searches pages of virtual mapping and registers the pages by get_page_bootmem(). CC: Len Brown CC: Benjamin Herrenschmidt CC: Paul Mackerras CC: Christoph Lameter Cc: Minchan Kim CC: Andrew Morton CC: KOSAKI Motohiro CC: Wen Congyang Signed-off-by: Yasuaki Ishimatsu --- arch/x86/mm/init_64.c | 53 +++++++++++++++++++++++++++++++++++++++++ include/linux/memory_hotplug.h | 2 + include/linux/mm.h | 3 +- mm/memory_hotplug.c | 23 +++++++++++++++-- 4 files changed, 77 insertions(+), 4 deletions(-) Index: linux-3.5-rc4/mm/memory_hotplug.c =================================================================== --- linux-3.5-rc4.orig/mm/memory_hotplug.c 2012-06-26 14:05:16.604459506 +0900 +++ linux-3.5-rc4/mm/memory_hotplug.c 2012-06-26 14:27:19.850916817 +0900 @@ -91,8 +91,8 @@ static void release_memory_resource(stru } #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE -static void get_page_bootmem(unsigned long info, struct page *page, - unsigned long type) +void get_page_bootmem(unsigned long info, struct page *page, + unsigned long type) { unsigned long page_type; @@ -164,8 +164,25 @@ static void register_page_bootmem_info_s } #else -static inline void register_page_bootmem_info_section(unsigned long start_pfn) +static void register_page_bootmem_info_section(unsigned long start_pfn) { + unsigned long mapsize, section_nr; + struct mem_section *ms; + struct page *page, *memmap; + + if (!pfn_valid(start_pfn)) + return; + + section_nr = pfn_to_section_nr(start_pfn); + ms = __nr_to_section(section_nr); + + memmap = sparse_decode_mem_map(ms->section_mem_map, section_nr); + + page = virt_to_page(memmap); + mapsize = sizeof(struct page) * PAGES_PER_SECTION; + mapsize = PAGE_ALIGN(mapsize) >> PAGE_SHIFT; + + register_page_bootmem_memmap(section_nr, memmap, PAGES_PER_SECTION); } #endif Index: linux-3.5-rc4/include/linux/mm.h =================================================================== --- linux-3.5-rc4.orig/include/linux/mm.h 2012-06-25 04:53:04.000000000 +0900 +++ linux-3.5-rc4/include/linux/mm.h 2012-06-26 14:26:17.481696320 +0900 @@ -1586,7 +1586,8 @@ int vmemmap_populate_basepages(struct pa unsigned long pages, int node); int vmemmap_populate(struct page *start_page, unsigned long pages, int node); void vmemmap_populate_print_last(void); - +void register_page_bootmem_memmap(unsigned long section_nr, struct page *map, + unsigned long size); enum mf_flags { MF_COUNT_INCREASED = 1 << 0, Index: linux-3.5-rc4/arch/x86/mm/init_64.c =================================================================== --- linux-3.5-rc4.orig/arch/x86/mm/init_64.c 2012-06-25 04:53:04.000000000 +0900 +++ linux-3.5-rc4/arch/x86/mm/init_64.c 2012-06-26 14:26:17.481696320 +0900 @@ -978,6 +978,59 @@ vmemmap_populate(struct page *start_page return 0; } +void __meminit +register_page_bootmem_memmap(unsigned long section_nr, struct page *start_page, + unsigned long size) +{ + unsigned long addr = (unsigned long)start_page; + unsigned long end = (unsigned long)(start_page + size); + unsigned long next; + pgd_t *pgd; + pud_t *pud; + pmd_t *pmd; + + for (; addr < end; addr = next) { + pte_t *pte = NULL; + + pgd = pgd_offset_k(addr); + if (pgd_none(*pgd)) { + next = (addr + PAGE_SIZE) & PAGE_MASK; + continue; + } + get_page_bootmem(section_nr, pgd_page(*pgd), MIX_SECTION_INFO); + + pud = pud_offset(pgd, addr); + if (pud_none(*pud)) { + next = (addr + PAGE_SIZE) & PAGE_MASK; + continue; + } + get_page_bootmem(section_nr, pud_page(*pud), MIX_SECTION_INFO); + + if (!cpu_has_pse) { + next = (addr + PAGE_SIZE) & PAGE_MASK; + pmd = pmd_offset(pud, addr); + if (pmd_none(*pmd)) + continue; + get_page_bootmem(section_nr, pmd_page(*pmd), + MIX_SECTION_INFO); + + pte = pte_offset_kernel(pmd, addr); + if (pte_none(*pte)) + continue; + get_page_bootmem(section_nr, pte_page(*pte), + SECTION_INFO); + } else { + next = pmd_addr_end(addr, end); + + pmd = pmd_offset(pud, addr); + if (pmd_none(*pmd)) + continue; + get_page_bootmem(section_nr, pmd_page(*pmd), + SECTION_INFO); + } + } +} + void __meminit vmemmap_populate_print_last(void) { if (p_start) { Index: linux-3.5-rc4/include/linux/memory_hotplug.h =================================================================== --- linux-3.5-rc4.orig/include/linux/memory_hotplug.h 2012-06-26 14:05:16.603459518 +0900 +++ linux-3.5-rc4/include/linux/memory_hotplug.h 2012-06-26 14:11:14.175989381 +0900 @@ -162,6 +162,8 @@ static inline void arch_refresh_nodedata extern void register_page_bootmem_info_node(struct pglist_data *pgdat); extern void put_page_bootmem(struct page *page); +extern void get_page_bootmem(unsigned long ingo, struct page *page, + unsigned long type); /* * Lock for memory hotplug guarantees 1) all callbacks for memory hotplug -- 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/