From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tang Chen Date: Wed, 09 Jan 2013 09:32:33 +0000 Subject: [PATCH v6 09/15] memory-hotplug: remove page table of x86_64 architecture Message-Id: <1357723959-5416-10-git-send-email-tangchen@cn.fujitsu.com> List-Id: References: <1357723959-5416-1-git-send-email-tangchen@cn.fujitsu.com> In-Reply-To: <1357723959-5416-1-git-send-email-tangchen@cn.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: akpm@linux-foundation.org, rientjes@google.com, len.brown@intel.com, benh@kernel.crashing.org, paulus@samba.org, cl@linux.com, minchan.kim@gmail.com, kosaki.motohiro@jp.fujitsu.com, isimatu.yasuaki@jp.fujitsu.com, wujianguo@huawei.com, wency@cn.fujitsu.com, tangchen@cn.fujitsu.com, hpa@zytor.com, linfeng@cn.fujitsu.com, laijs@cn.fujitsu.com, mgorman@suse.de, yinghai@kernel.org, glommer@parallels.com Cc: x86@kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-acpi@vger.kernel.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, linux-ia64@vger.kernel.org, cmetcalf@tilera.com, sparclinux@vger.kernel.org This patch searches a page table about the removed memory, and clear page table for x86_64 architecture. Signed-off-by: Wen Congyang Signed-off-by: Jianguo Wu Signed-off-by: Jiang Liu Signed-off-by: Tang Chen --- arch/x86/mm/init_64.c | 10 ++++++++++ 1 files changed, 10 insertions(+), 0 deletions(-) diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index fe01116..d950f9b 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -981,6 +981,15 @@ remove_pagetable(unsigned long start, unsigned long end, bool direct) flush_tlb_all(); } +void __meminit +kernel_physical_mapping_remove(unsigned long start, unsigned long end) +{ + start = (unsigned long)__va(start); + end = (unsigned long)__va(end); + + remove_pagetable(start, end, true); +} + #ifdef CONFIG_MEMORY_HOTREMOVE int __ref arch_remove_memory(u64 start, u64 size) { @@ -990,6 +999,7 @@ int __ref arch_remove_memory(u64 start, u64 size) int ret; zone = page_zone(pfn_to_page(start_pfn)); + kernel_physical_mapping_remove(start, start + size); ret = __remove_pages(zone, start_pfn, nr_pages); WARN_ON_ONCE(ret); -- 1.7.1