On Mon, Dec 14, 2015 at 07:02:25PM +0800, yalin wang wrote: > change find_vma() to break ealier when found the adderss > is not in any vma, don't need loop to search all vma. > > Signed-off-by: yalin wang <yalin.wang2010@xxxxxxxxx> > --- > mm/mmap.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/mm/mmap.c b/mm/mmap.c > index b513f20..8294c9b 100644 > --- a/mm/mmap.c > +++ b/mm/mmap.c > @@ -2064,6 +2064,9 @@ struct vm_area_struct *find_vma(struct mm_struct *mm, unsigned long addr) > vma = tmp; > if (tmp->vm_start <= addr) > break; > + if (!tmp->vm_prev || tmp->vm_prev->vm_end <= addr) > + break; > + This 'break' would return 'tmp' as found vma. Have you even tried to test the code? > rb_node = rb_node->rb_left; > } else > rb_node = rb_node->rb_right; > -- > 1.9.1 > > -- > 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> -- Kirill A. Shutemov -- 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>