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Thu, 3 Jul 2025 06:07:47 GMT Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E9CE52004B; Thu, 3 Jul 2025 06:07:46 +0000 (GMT) Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 998A620040; Thu, 3 Jul 2025 06:07:41 +0000 (GMT) Received: from aboo.ibm.com.com (unknown [9.39.26.205]) by smtpav02.fra02v.mail.ibm.com (Postfix) with ESMTP; Thu, 3 Jul 2025 06:07:41 +0000 (GMT) From: Aboorva Devarajan To: akpm@linux-foundation.org, Liam.Howlett@oracle.com, lorenzo.stoakes@oracle.com, shuah@kernel.org, pfalcato@suse.de, david@redhat.com, ziy@nvidia.com, baolin.wang@linux.alibaba.com, npache@redhat.com, ryan.roberts@arm.com, dev.jain@arm.com, baohua@kernel.org Cc: linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, donettom@linux.ibm.com, ritesh.list@gmail.com, aboorvad@linux.ibm.com Subject: [PATCH v2 7/7] selftests/mm: Skip hugepage-mremap test if userfaultfd unavailable Date: Thu, 3 Jul 2025 11:36:56 +0530 Message-ID: <20250703060656.54345-8-aboorvad@linux.ibm.com> X-Mailer: git-send-email 2.50.0 In-Reply-To: <20250703060656.54345-1-aboorvad@linux.ibm.com> References: <20250703060656.54345-1-aboorvad@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: 5Ls_1_7HOXzI2zmpYqNqX88roOpK-jGu X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNzAzMDA0NCBTYWx0ZWRfX/zEbeLNpLbEg wjxGKn9BUIGWtjzKwUCg4EPH5oYZvBjP/865ePo0sQrTRwBb7bq1h9bfi631xlQN8WH2959YS8v QDoWr8DzSkT4eFTFGLdkOG+WikXrVlSuw6XdcI/RPsjz0S8e9Dta8Cv3/GePUjwbCQGu+Il2Hl/ AofQUjCAVfOvuXwKO5b2mFF1TMgnz5dPh9MupMqbrVooxSL662uMFLH1/Yl1kNcw3E+DFzxl0CC q+eSWvjNvSWqJjLWLWotnmnmq4Y/j4YFdKnMwPBCqiw0iTPy+45gdDDS2PZb2noJtTyTYAUZW9X dzzTqFmYf94koByC3gymCZt4593uN0eE0Us5Y0FlkdiYWs8zK0stx3AnRx8ZJ5V35C3vKr5lzsw UWN4V2grn5g3hzdqbhLyVr9RxRQcaOmnfaHUFpwn/TqHolOdRItRw5ipdVbTjjs0B2ZC6q1B X-Authority-Analysis: v=2.4 cv=LpeSymdc c=1 sm=1 tr=0 ts=68661e38 cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=Wb1JkmetP80A:10 a=VnNF1IyMAAAA:8 a=I-yzSHZ7cBtOcMPljFIA:9 X-Proofpoint-GUID: HUff6wG2QLV5FWq9UjfQSvPCV-lAD2g1 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.7,FMLib:17.12.80.40 definitions=2025-07-03_01,2025-07-02_04,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 spamscore=0 bulkscore=0 lowpriorityscore=0 adultscore=0 clxscore=1015 impostorscore=0 mlxscore=0 mlxlogscore=999 phishscore=0 suspectscore=0 malwarescore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505280000 definitions=main-2507030044 X-Rspam-User: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: EB18440004 X-Stat-Signature: bg6oakcdjse6rfqi1jzjq1yj6g138ocj X-HE-Tag: 1751522876-7314 X-HE-Meta: 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 hZdqnodE NGNhGC6+Mt8ivHWRTpfDocON4C14I5ns2b/8JH4IpM/5lc2EUyfWoPYwLY5jhk3mWWdnl2IAp8oVpLMbpz2qYOIVJ2uTTdv7J312twSxc7IVOLKirrqufAisoKTuH7z/HRhbrJ43ykYJQ2CchruWTJVAMoUhY+8klgryFj4H6roEDpbawUWRPK5KJ8D9OcPTrfjbcFJI02OzoD+6nWxfXGvG27Gs00qFr0WJqEjs/Q9Fi72HUsx4aXU1AoM6YoVOFy9bHfjvI3WLn6G0+reN7V0/NUQ== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Gracefully skip test if userfaultfd is not supported (ENOSYS) or not permitted (EPERM), instead of failing. This avoids misleading failures with clear skip messages. -------------- Before Patch -------------- ~ running ./hugepage-mremap ... ~ Bail out! userfaultfd: Function not implemented ~ Planned tests != run tests (1 != 0) ~ Totals: pass:0 fail:0 xfail:0 xpass:0 skip:0 error:0 ~ [FAIL] not ok 4 hugepage-mremap # exit=1 -------------- After Patch -------------- ~ running ./hugepage-mremap ... ~ ok 2 # SKIP userfaultfd is not supported/not enabled. ~ 1 skipped test(s) detected. ~ Totals: pass:0 fail:0 xfail:0 xpass:0 skip:1 error:0 ~ [SKIP] ok 4 hugepage-mremap # SKIP Signed-off-by: Aboorva Devarajan --- tools/testing/selftests/mm/hugepage-mremap.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/mm/hugepage-mremap.c b/tools/testing/selftests/mm/hugepage-mremap.c index c463d1c09c9b..1a0e6dd87578 100644 --- a/tools/testing/selftests/mm/hugepage-mremap.c +++ b/tools/testing/selftests/mm/hugepage-mremap.c @@ -65,10 +65,20 @@ static void register_region_with_uffd(char *addr, size_t len) struct uffdio_api uffdio_api; /* Create and enable userfaultfd object. */ - uffd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK); - if (uffd == -1) - ksft_exit_fail_msg("userfaultfd: %s\n", strerror(errno)); + if (uffd == -1) { + switch (errno) { + case EPERM: + ksft_exit_skip("No userfaultfd permissions, try running as root.\n"); + break; + case ENOSYS: + ksft_exit_skip("userfaultfd is not supported/not enabled.\n"); + break; + default: + ksft_exit_fail_msg("userfaultfd failed with %s\n", strerror(errno)); + break; + } + } uffdio_api.api = UFFD_API; uffdio_api.features = 0; -- 2.43.5