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Mon, 4 May 2026 09:11:11 +0000 (GMT) From: Aboorva Devarajan To: Andrew Morton , Shuah Khan , linux-mm@kvack.org, linux-kselftest@vger.kernel.org Cc: Sayali Patil , linux-kernel@vger.kernel.org, Aboorva Devarajan Subject: [PATCH 1/3] selftests/mm: allow PUD-level entries in compound testcase of hmm tests Date: Mon, 4 May 2026 14:41:06 +0530 Message-ID: X-Mailer: git-send-email 2.54.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTA0MDA5NyBTYWx0ZWRfX2OTKEwUdMLi/ ntGJYwlcp8C1ZyrhHAxE5H89GTwk7NKGtr0nohDG9mGLpvMJgjB2xJaerwrO5DwPT4MHmR2pf5K Sg9MkFfuoVvEXQdnc9rklJ7mE0GBO+bMcvKIOB54VIaEbcUOKo3FujSQpdBrGuEIaBdPJufFqwV Z/CiWs8s5X7/brmNoeT++Ytc2yn1xvBhKLjK+g4vFutzDlutNL9rMi5txFegCKxUpHkFkWGrxmk ZvM5L4Hf5K3WCs/pojwhhYCJohaDIpJq9+DA97XZTl0wmdwNxBfRplaHXJdYWEYAcl1SyoMa9Us CzsAbyRl5E2IS6iyY4FkKIVn9dJoI4TKiJ3//GSA+oM92wnyCrxjrdx8fA+Ebvem5rzH2kordjg jcN7Mn96Z8qBIFNPthXeIphXMfy61DVfwEX4+5ZI2I8dYLa2NCFQ3mdWt9vArWMbOmCxrDnLq9A th+c+SBH98yol+CAKkQ== X-Proofpoint-ORIG-GUID: wcx_EMfXyr1ZDFrb0a5UjKobkgA1YPmS X-Proofpoint-GUID: wcx_EMfXyr1ZDFrb0a5UjKobkgA1YPmS X-Authority-Analysis: v=2.4 cv=ctWrVV4i c=1 sm=1 tr=0 ts=69f862b5 cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=NGcC8JguVDcA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=V8glGbnc2Ofi9Qvn3v5h:22 a=VnNF1IyMAAAA:8 a=QxgUL920Qp7ezWAymYEA:9 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-05-04_03,2026-04-30_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 lowpriorityscore=0 adultscore=0 clxscore=1011 suspectscore=0 impostorscore=0 spamscore=0 malwarescore=0 phishscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604200000 definitions=main-2605040097 From: Sayali Patil The HMM compound testcase currently assume only PMD-level mappings and fail on systems when default_hugepagesz=1G is set. Extend the checks to accept PUD-level protections as well, avoiding false failures. Fixes: e478425bec93 ("mm/hmm: add tests for hmm_pfn_to_map_order()") Signed-off-by: Sayali Patil Signed-off-by: Aboorva Devarajan --- tools/testing/selftests/mm/hmm-tests.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/tools/testing/selftests/mm/hmm-tests.c b/tools/testing/selftests/mm/hmm-tests.c index 77fb4c5d871b..6dc839866dfe 100644 --- a/tools/testing/selftests/mm/hmm-tests.c +++ b/tools/testing/selftests/mm/hmm-tests.c @@ -1599,8 +1599,8 @@ TEST_F(hmm2, snapshot) } /* - * Test the hmm_range_fault() HMM_PFN_PMD flag for large pages that - * should be mapped by a large page table entry. + * Test the hmm_range_fault() handling of large pages (PMD or PUD) + * that should be mapped by a large page table entry. */ TEST_F(hmm, compound) { @@ -1649,8 +1649,8 @@ TEST_F(hmm, compound) /* Check what the device saw. */ m = buffer->mirror; for (i = 0; i < npages; ++i) - ASSERT_EQ(m[i], HMM_DMIRROR_PROT_WRITE | - HMM_DMIRROR_PROT_PMD); + ASSERT_TRUE((m[i] == (HMM_DMIRROR_PROT_WRITE | HMM_DMIRROR_PROT_PMD)) || + (m[i] == (HMM_DMIRROR_PROT_WRITE | HMM_DMIRROR_PROT_PUD))); /* Make the region read-only. */ ret = mprotect(buffer->ptr, size, PROT_READ); @@ -1664,8 +1664,8 @@ TEST_F(hmm, compound) /* Check what the device saw. */ m = buffer->mirror; for (i = 0; i < npages; ++i) - ASSERT_EQ(m[i], HMM_DMIRROR_PROT_READ | - HMM_DMIRROR_PROT_PMD); + ASSERT_TRUE((m[i] == (HMM_DMIRROR_PROT_READ | HMM_DMIRROR_PROT_PMD)) || + (m[i] == (HMM_DMIRROR_PROT_READ | HMM_DMIRROR_PROT_PUD))); munmap(buffer->ptr, buffer->size); buffer->ptr = NULL; -- 2.54.0