On Wed, 7 Nov 2012, Kirill A. Shutemov wrote: > diff --git a/mm/huge_memory.c b/mm/huge_memory.c > index d767a7c..05490b3 100644 > --- a/mm/huge_memory.c > +++ b/mm/huge_memory.c > @@ -1259,6 +1259,8 @@ int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, > pmd_t entry; > entry = pmdp_get_and_clear(mm, addr, pmd); > entry = pmd_modify(entry, newprot); > + if (is_huge_zero_pmd(entry)) > + entry = pmd_wrprotect(entry); > set_pmd_at(mm, addr, pmd, entry); > spin_unlock(&vma->vm_mm->page_table_lock); > ret = 1; Nack, this should be handled in pmd_modify(). -- 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>