From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Tue, 5 Dec 2006 22:10:34 +0900 From: KAMEZAWA Hiroyuki Subject: [RFC][PATCH] vmemmap on sparsemem v2 [5/5] optimzied pfn_valid support for ia64 Message-Id: <20061205221034.6bed736c.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <20061205214517.5ad924f6.kamezawa.hiroyu@jp.fujitsu.com> References: <20061205214517.5ad924f6.kamezawa.hiroyu@jp.fujitsu.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: KAMEZAWA Hiroyuki Cc: linux-mm@kvack.org, clameter@engr.sgi.com, apw@shadowen.org List-ID: USE_OPT_PFN_VALID support for ia64. Because ia64 already has its own VIRTUAL_MEM_MAP handling, This patch is simple. When porting other archs, you have to add hook in page fault handler and write a func like mapped_kernel_page_is_present() (ia64). Signed-Off-By: KAMEZAWA Hiroyuki arch/ia64/Kconfig | 4 ++++ arch/ia64/mm/fault.c | 4 ++-- 2 files changed, 6 insertions(+), 2 deletions(-) Index: devel-2.6.19-rc6-mm2/arch/ia64/Kconfig =================================================================== --- devel-2.6.19-rc6-mm2.orig/arch/ia64/Kconfig 2006-12-05 20:41:55.000000000 +0900 +++ devel-2.6.19-rc6-mm2/arch/ia64/Kconfig 2006-12-05 20:45:34.000000000 +0900 @@ -349,6 +349,10 @@ def_bool y depends on ARCH_SPARSEMEM_ENABLE +config USE_OPT_PFN_VALID + def_bool y + depends on SPARSEMEM_VMEMMAP + config ARCH_DISCONTIGMEM_DEFAULT def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB) depends on ARCH_DISCONTIGMEM_ENABLE Index: devel-2.6.19-rc6-mm2/arch/ia64/mm/fault.c =================================================================== --- devel-2.6.19-rc6-mm2.orig/arch/ia64/mm/fault.c 2006-12-05 20:41:55.000000000 +0900 +++ devel-2.6.19-rc6-mm2/arch/ia64/mm/fault.c 2006-12-05 20:45:34.000000000 +0900 @@ -103,7 +103,7 @@ if (in_atomic() || !mm) goto no_context; -#ifdef CONFIG_VIRTUAL_MEM_MAP +#if defined(CONFIG_VIRTUAL_MEM_MAP) || defined(CONFIG_USE_OPT_PFN_VALID) /* * If fault is in region 5 and we are in the kernel, we may already * have the mmap_sem (pfn_valid macro is called during mmap). There @@ -211,7 +211,7 @@ bad_area: up_read(&mm->mmap_sem); -#ifdef CONFIG_VIRTUAL_MEM_MAP +#if defined(CONFIG_VIRTUAL_MEM_MAP) || defined(CONFIG_SPARSEMEM_VMEMMAP) bad_area_no_up: #endif if ((isr & IA64_ISR_SP) -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org