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Howlett" , Lance Yang , Leon Romanovsky , Lorenzo Stoakes , Mark Brown , Michal Hocko , Mike Rapoport , Nico Pache , Peter Xu , Ryan Roberts , Shuah Khan , Suren Baghdasaryan , Vlastimil Babka , Zi Yan , linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 43/53] selftests/mm: migration: add setup of HugeTLB pages Date: Mon, 6 Apr 2026 17:17:25 +0300 Message-ID: <20260406141735.2179309-44-rppt@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260406141735.2179309-1-rppt@kernel.org> References: <20260406141735.2179309-1-rppt@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: D6DFFC0011 X-Stat-Signature: hm7opea5egrq8dwx3adcuj1qjt3716bt X-HE-Tag: 1775485315-166232 X-HE-Meta: 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 YmNuVY+5 DSksbTX1rgm+E/FD+Ibi/G5ZyeAuVAVVDRH28L+evf0JHg+inWzjbtyDA8C4HHNOuvHO4igIcFlMtC1sqMai9g3JoneYCl2be+yJpPvy8+27zNXax1t4Re5Flcsz3A+m6vWsxuAGWWXBxKkXicd4Al0KofU+ni+xCMOLzqBUfJQ4XHtJWNEqA+ru6C5KG7EuaVleRXbUOmtxdup1IiXaunZ1aCdONiilaza2aA2tly5xFMnc= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: "Mike Rapoport (Microsoft)" migration skips HugeTLB tests if there are no free huge pages prepared by a wrapper script. Add setup of HugeTLB pages to the test and make sure that the original settings are restored on the test exit. Since kselftest_harness runs fixture setup and the tests in child processes, use HUGETLB_SETUP_DEFAULT_PAGES() that defines a constructor that runs in the main process and add verification that there are enough free huge pages to the tests that use them. Signed-off-by: Mike Rapoport (Microsoft) --- tools/testing/selftests/mm/migration.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/tools/testing/selftests/mm/migration.c b/tools/testing/selftests/mm/migration.c index ccf42002ce86..61fb00953f83 100644 --- a/tools/testing/selftests/mm/migration.c +++ b/tools/testing/selftests/mm/migration.c @@ -23,6 +23,8 @@ #define MAX_RETRIES 100 #define ALIGN(x, a) (((x) + (a - 1)) & (~((a) - 1))) +HUGETLB_SETUP_DEFAULT_PAGES(1) + FIXTURE(migration) { pthread_t *threads; @@ -277,6 +279,9 @@ TEST_F_TIMEOUT(migration, private_anon_htlb, 2*RUNTIME) if (!hugepage_size) SKIP(return, "Reading HugeTLB pagesize failed\n"); + if (hugetlb_free_default_pages() < 1) + SKIP(return, "Not enough huge pages\n"); + ptr = mmap(NULL, hugepage_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB, -1, 0); ASSERT_NE(ptr, MAP_FAILED); @@ -308,6 +313,9 @@ TEST_F_TIMEOUT(migration, shared_anon_htlb, 2*RUNTIME) if (!hugepage_size) SKIP(return, "Reading HugeTLB pagesize failed\n"); + if (hugetlb_free_default_pages() < 1) + SKIP(return, "Not enough huge pages\n"); + ptr = mmap(NULL, hugepage_size, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS | MAP_HUGETLB, -1, 0); ASSERT_NE(ptr, MAP_FAILED); -- 2.53.0