From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8F9853B27E8 for ; Sun, 4 Oct 2026 20:04:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791144269; cv=none; b=Rxmo+KQVyKvP7LFL6qB/l7YSTVhIGo6bz0nnVxJLSBLbXSokdNOr9/kIKMlzWqMNr0VDFllhaFy/LsdG+r+moI/xc3uo3rvp7HyyVfifFEYCuwxq3LLU7LNn1bt1PUw+dTaUhNEG211uKucakAwDcT6PAeyfyIIN2UmCSxtQnRQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791144269; c=relaxed/simple; bh=u3SsbQrq7bzyd6bqB0m1JPYtl5QELqXcJF1U8H85aks=; h=Date:To:From:Subject:Message-Id; b=Nd0QGQ74DZKu0AZQRWBE+0ZcnsA9L4DLemJzN70lvNLMe1olS1lU6EgkX4NlKAZnHq35YsDxbblHrRXIOWJZYeIZ0cqlNBlDBvURb7mfS7fITEnUbAdfa1eaOjvxOI4E+op7WFBZog0qRtNENPeAlQeLSIfs9Xp4i30ecFj/7Q4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=bQAiwFgk; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="bQAiwFgk" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C31A41F00893; Sun, 4 Oct 2026 20:04:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1791144265; bh=jlFjxGXS+9zl7AK3AeSLvWELXp6TkNPsqxdrxeKoDtY=; h=Date:To:From:Subject; b=bQAiwFgkhblcsKKkK+e8nvuZHwpGZ/Bhz8XF+EdYJ+sfrZArFC9YI5PORYQrjOVwr 0KUWU/gKEFrrQXp9yLfK4gzsvSZrXC9XrjFbd3mrFIwIxJCno24NizSzXXbWEMg8R3 wL84LR9dy6dTnMjIH0srPfWe84lQ1XEGCYe1w0UM= Date: Sun, 04 Oct 2026 13:04:25 -0700 To: mm-commits@vger.kernel.org,donggeunyoo.kernel@gmail.com,akpm@linux-foundation.org From: Andrew Morton Subject: [to-be-updated] selftests-mm-add-tests-for-uffdio_move-of-a-uffd-protected-swap-entry.patch removed from -mm tree Message-Id: <20261004200425.C31A41F00893@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: selftests/mm: add tests for UFFDIO_MOVE of a uffd-protected swap entry has been removed from the -mm tree. Its filename was selftests-mm-add-tests-for-uffdio_move-of-a-uffd-protected-swap-entry.patch This patch was dropped because an updated version will be issued ------------------------------------------------------ From: Donggeun Yoo Subject: selftests/mm: add tests for UFFDIO_MOVE of a uffd-protected swap entry Date: Sat, 26 Sep 2026 21:41:45 +0900 Move a swapped-out page out of a write-protected or RWP-protected area into a destination registered for missing faults only, and read pagemap bit 57 at the destination. The destination was never protected, so the bit must be clear. Link: https://lore.kernel.org/20260926124145.2878520-3-donggeunyoo.kernel@gmail.com Signed-off-by: Donggeun Yoo Signed-off-by: Andrew Morton Assisted-by: LLM Cc: Mike Rapoport Cc: Peter Xu Cc: Suren Baghdasaryan Cc: Andrea Arcangeli Cc: David Hildenbrand Cc: Lorenzo Stoakes Cc: Liam R. Howlett Cc: Vlastimil Babka Cc: Michal Hocko Cc: Shuah Khan Cc: Kiryl Shutsemau --- tools/testing/selftests/mm/uffd-unit-tests.c | 84 +++++++++++++++++ 1 file changed, 84 insertions(+) --- a/tools/testing/selftests/mm/uffd-unit-tests.c~selftests-mm-add-tests-for-uffdio_move-of-a-uffd-protected-swap-entry +++ a/tools/testing/selftests/mm/uffd-unit-tests.c @@ -2037,6 +2037,75 @@ static void uffd_move_pmd_split_test(uff uffd_move_pmd_handle_fault); } +/* + * Moving a swapped-out page out of a write-protected or RWP-protected area + * must not carry the uffd bit into a destination registered for missing + * faults only: such a bit is never cleared afterwards, so pagemap keeps + * reporting the page as uffd-tracked. + * + * Needs a swap device; skipped if MADV_PAGEOUT cannot evict the page. + */ +static void uffd_move_swap_test_common(uffd_global_test_opts_t *gopts, + bool rwp) +{ + unsigned long page_size = gopts->page_size; + struct uffdio_move move = { }; + int pagemap_fd; + + if (rwp) { + if (uffd_register_rwp(gopts->uffd, gopts->area_src, page_size)) + err("register src failure"); + } else if (uffd_register(gopts->uffd, gopts->area_src, page_size, + false, true, false)) { + err("register src failure"); + } + if (uffd_register(gopts->uffd, gopts->area_dst, page_size, + true, false, false)) + err("register dst failure"); + + if (rwp) + rwprotect_range(gopts->uffd, (unsigned long)gopts->area_src, + page_size, true); + else + wp_range(gopts->uffd, (unsigned long)gopts->area_src, + page_size, true); + + pagemap_fd = pagemap_open(); + if (madvise(gopts->area_src, page_size, MADV_PAGEOUT)) + err("MADV_PAGEOUT"); + if (!pagemap_is_swapped(pagemap_fd, gopts->area_src)) { + uffd_test_skip("MADV_PAGEOUT did not swap the page; is swap enabled?"); + goto out; + } + + move.dst = (unsigned long)gopts->area_dst; + move.src = (unsigned long)gopts->area_src; + move.len = page_size; + if (ioctl(gopts->uffd, UFFDIO_MOVE, &move)) + err("UFFDIO_MOVE"); + + if (pagemap_get_entry(pagemap_fd, gopts->area_dst) & PM_UFFD_WP) + uffd_test_fail("uffd bit moved into an area registered for missing faults only"); + else + uffd_test_pass(); +out: + close(pagemap_fd); + uffd_unregister(gopts->uffd, gopts->area_src, page_size); + uffd_unregister(gopts->uffd, gopts->area_dst, page_size); +} + +static void uffd_move_swap_wp_test(uffd_global_test_opts_t *gopts, + uffd_test_args_t *targs) +{ + uffd_move_swap_test_common(gopts, false); +} + +static void uffd_move_swap_rwp_test(uffd_global_test_opts_t *gopts, + uffd_test_args_t *targs) +{ + uffd_move_swap_test_common(gopts, true); +} + static bool uffdio_verify_results(const char *name, int ret, int error, long result) { @@ -2360,6 +2429,21 @@ uffd_test_case_t uffd_tests[] = { .test_case_ops = &uffd_move_test_pmd_case_ops, }, { + .name = "move-swap-wp", + .uffd_fn = uffd_move_swap_wp_test, + .mem_targets = MEM_ANON, + .uffd_feature_required = UFFD_FEATURE_MOVE | + UFFD_FEATURE_PAGEFAULT_FLAG_WP, + .test_case_ops = &uffd_move_test_case_ops, + }, + { + .name = "move-swap-rwp", + .uffd_fn = uffd_move_swap_rwp_test, + .mem_targets = MEM_ANON, + .uffd_feature_required = UFFD_FEATURE_MOVE | UFFD_FEATURE_RWP, + .test_case_ops = &uffd_move_test_case_ops, + }, + { .name = "wp-fork", .uffd_fn = uffd_wp_fork_test, .mem_targets = MEM_ALL, _ Patches currently in -mm which might be from donggeunyoo.kernel@gmail.com are mm-damon-core-charge-only-the-part-of-a-region-the-filter-left.patch mm-damon-tests-core-kunit-test-the-size-charged-for-a-filter-trimmed-region.patch mm-damon-core-prevent-size-quota-overflow-in-the-temporal-goal-tuner.patch mm-damon-tests-core-kunit-test-the-temporal-tuners-size-quota-conversion.patch