On Sun, May 12, 2013 at 9:23 AM, Kirill A. Shutemov <[email protected]> wrote: > @@ -1120,7 +1119,7 @@ int do_huge_pmd_wp_page(struct mm_struct *mm, struct > vm_area_struct *vma, > > page = pmd_page(orig_pmd); > VM_BUG_ON(!PageCompound(page) || !PageHead(page)); > - if (page_mapcount(page) == 1) { > + if (PageAnon(page) && page_mapcount(page) == 1) {
Could we avoid copying huge page if no-one else is using it, no matter anon? > pmd_t entry; > entry = pmd_mkyoung(orig_pmd); > entry = maybe_pmd_mkwrite(pmd_mkdirty(entry), vma); -- 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/
