From: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx> Make arch_get_unmapped_area() return unmapped area aligned to HPAGE_MASK if the file mapping can have huge pages. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> --- arch/x86/kernel/sys_x86_64.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/sys_x86_64.c b/arch/x86/kernel/sys_x86_64.c index dbded5a..4e20cd5 100644 --- a/arch/x86/kernel/sys_x86_64.c +++ b/arch/x86/kernel/sys_x86_64.c @@ -15,6 +15,7 @@ #include <linux/random.h> #include <linux/uaccess.h> #include <linux/elf.h> +#include <linux/pagemap.h> #include <asm/ia32.h> #include <asm/syscalls.h> @@ -135,7 +136,11 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr, info.length = len; info.low_limit = begin; info.high_limit = end; - info.align_mask = filp ? get_align_mask() : 0; + if (filp) + info.align_mask = mapping_can_have_hugepages(filp->f_mapping) ? + PAGE_MASK & ~HPAGE_MASK : get_align_mask(); + else + info.align_mask = 0; info.align_offset = pgoff << PAGE_SHIFT; return vm_unmapped_area(&info); } @@ -174,7 +179,11 @@ arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0, info.length = len; info.low_limit = PAGE_SIZE; info.high_limit = mm->mmap_base; - info.align_mask = filp ? get_align_mask() : 0; + if (filp) + info.align_mask = mapping_can_have_hugepages(filp->f_mapping) ? + PAGE_MASK & ~HPAGE_MASK : get_align_mask(); + else + info.align_mask = 0; info.align_offset = pgoff << PAGE_SHIFT; addr = vm_unmapped_area(&info); if (!(addr & ~PAGE_MASK)) -- 1.7.10.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>