ia64 support for sparsemem vmem_map optimize pfn_valid() patch. Because ia64 has its own virtual mem_map, we can reuse the same code. So this patch is simple.
To support optimized pfn_valid() in other arch, you (may) have to modify fault handler in kernel address space. Signed-Off-By: KAMEZAWA Hiroyuki <[EMAIL PROTECTED]> arch/ia64/Kconfig | 4 ++++ arch/ia64/mm/fault.c | 4 ++-- 2 files changed, 6 insertions(+), 2 deletions(-) Index: devel-2.6.20-rc1-mm1/arch/ia64/Kconfig =================================================================== --- devel-2.6.20-rc1-mm1.orig/arch/ia64/Kconfig 2006-12-16 14:42:57.000000000 +0900 +++ devel-2.6.20-rc1-mm1/arch/ia64/Kconfig 2006-12-16 14:43:14.000000000 +0900 @@ -353,6 +353,10 @@ def_bool y depends on SPARSEMEM_VMEMMAP +config ARCH_SPARSEMEM_VMEMMAP_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-2.6.20-rc1-mm1/arch/ia64/mm/fault.c =================================================================== --- devel-2.6.20-rc1-mm1.orig/arch/ia64/mm/fault.c 2006-12-16 14:42:57.000000000 +0900 +++ devel-2.6.20-rc1-mm1/arch/ia64/mm/fault.c 2006-12-16 14:43:40.000000000 +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_SPARSEMEM_VMEMMAP_OPT_PFNVALID) /* * 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_OPT_PFNVALID) bad_area_no_up: #endif if ((isr & IA64_ISR_SP) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/