{"id":2220076,"url":"http://patchwork.ozlabs.org/api/patches/2220076/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/80239ca37ad96216eb5d9768cf5373e7246626ff.1775466330.git.sayalip@linux.ibm.com/","project":{"id":2,"url":"http://patchwork.ozlabs.org/api/projects/2/?format=json","name":"Linux PPC development","link_name":"linuxppc-dev","list_id":"linuxppc-dev.lists.ozlabs.org","list_email":"linuxppc-dev@lists.ozlabs.org","web_url":"https://github.com/linuxppc/wiki/wiki","scm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git","webscm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/","list_archive_url":"https://lore.kernel.org/linuxppc-dev/","list_archive_url_format":"https://lore.kernel.org/linuxppc-dev/{}/","commit_url_format":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}"},"msgid":"<80239ca37ad96216eb5d9768cf5373e7246626ff.1775466330.git.sayalip@linux.ibm.com>","list_archive_url":"https://lore.kernel.org/linuxppc-dev/80239ca37ad96216eb5d9768cf5373e7246626ff.1775466330.git.sayalip@linux.ibm.com/","date":"2026-04-06T09:19:30","name":"[v4,11/15] selftests/mm: skip uffd-wp-mremap if UFFD write-protect is unsupported","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"f770ae0d28c806a7f908cf4cd1e35fd102a676f4","submitter":{"id":92656,"url":"http://patchwork.ozlabs.org/api/people/92656/?format=json","name":"Sayali Patil","email":"sayalip@linux.ibm.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/80239ca37ad96216eb5d9768cf5373e7246626ff.1775466330.git.sayalip@linux.ibm.com/mbox/","series":[{"id":498833,"url":"http://patchwork.ozlabs.org/api/series/498833/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=498833","date":"2026-04-06T09:19:22","name":"selftests/mm: fix failures and robustness improvements","version":4,"mbox":"http://patchwork.ozlabs.org/series/498833/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2220076/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2220076/checks/","tags":{},"related":[],"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linuxppc-dev@lists.ozlabs.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256\n header.s=pp1 header.b=SlYAUe+A;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=112.213.38.117; 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On systems where userfaultfd write-protect is\nnot supported, uffd_register() fails and the test reports failures.\n\nCheck for the required feature at startup and skip the test when the\nUFFD_FEATURE_PAGEFAULT_FLAG_WP capability is not present,\npreventing false failures on unsupported configurations.\n\nBefore patch:\n running ./uffd-wp-mremap\n ------------------------\n [INFO] detected THP size: 256 KiB\n [INFO] detected THP size: 512 KiB\n [INFO] detected THP size: 1024 KiB\n [INFO] detected THP size: 2048 KiB\n [INFO] detected hugetlb page size: 2048 KiB\n [INFO] detected hugetlb page size: 1048576 KiB\n 1..24\n [RUN] test_one_folio(size=65536, private=false, swapout=false,\n hugetlb=false)\n not ok 1 uffd_register() failed\n [RUN] test_one_folio(size=65536, private=true, swapout=false,\n hugetlb=false)\n not ok 2 uffd_register() failed\n [RUN] test_one_folio(size=65536, private=false, swapout=true,\n hugetlb=false)\n not ok 3 uffd_register() failed\n [RUN] test_one_folio(size=65536, private=true, swapout=true,\n hugetlb=false)\n not ok 4 uffd_register() failed\n [RUN] test_one_folio(size=262144, private=false, swapout=false,\n hugetlb=false)\n not ok 5 uffd_register() failed\n [RUN] test_one_folio(size=524288, private=false, swapout=false,\n hugetlb=false)\n not ok 6 uffd_register() failed\n .\n .\n .\n Bail out! 24 out of 24 tests failed\n Totals: pass:0 fail:24 xfail:0 xpass:0 skip:0 error:0\n [FAIL]\nnot ok 1 uffd-wp-mremap # exit=1\n\nAfter patch:\n running ./uffd-wp-mremap\n ------------------------\n 1..0 # SKIP uffd-wp feature not supported\n [SKIP]\nok 1 uffd-wp-mremap # SKIP\n\nSigned-off-by: Sayali Patil \n---\n tools/testing/selftests/mm/uffd-wp-mremap.c | 13 +++++++++++++\n 1 file changed, 13 insertions(+)","diff":"diff --git a/tools/testing/selftests/mm/uffd-wp-mremap.c b/tools/testing/selftests/mm/uffd-wp-mremap.c\nindex 17186d4a4147..8f288484d5f5 100644\n--- a/tools/testing/selftests/mm/uffd-wp-mremap.c\n+++ b/tools/testing/selftests/mm/uffd-wp-mremap.c\n@@ -19,6 +19,17 @@ static size_t thpsizes[20];\n static int nr_hugetlbsizes;\n static size_t hugetlbsizes[10];\n \n+static void check_uffd_wp_feature_supported(void)\n+{\n+\tuint64_t features = 0;\n+\n+\tif (uffd_get_features(&features))\n+\t\tksft_exit_skip(\"failed to get available features (%d)\\n\", errno);\n+\n+\tif (!(features & UFFD_FEATURE_PAGEFAULT_FLAG_WP))\n+\t\tksft_exit_skip(\"uffd-wp feature not supported\\n\");\n+}\n+\n static int detect_thp_sizes(size_t sizes[], int max)\n {\n \tint count = 0;\n@@ -336,6 +347,8 @@ int main(int argc, char **argv)\n \tstruct thp_settings settings;\n \tint i, j, plan = 0;\n \n+\tcheck_uffd_wp_feature_supported();\n+\n \tpagesize = getpagesize();\n \tnr_thpsizes = detect_thp_sizes(thpsizes, ARRAY_SIZE(thpsizes));\n \tnr_hugetlbsizes = detect_hugetlb_page_sizes(hugetlbsizes,\n","prefixes":["v4","11/15"]}