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 F2C2947C0F7; Sat, 12 Sep 2026 12:46:53 +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=1789217215; cv=none; b=ESITc1N4tYIQEda8MCRXXZT80eN5sAgy58+g4l54g9pVGFv5xe4IPLVM/PKgeBKpCHg97rid2MbK5A5FSX4Myh0lD+9m0WJfibPvxEqAbtHE+ER2VWTiPRZrqtxeBASra+U92HicowzQgpxNsjmYOKRGllmfuml5Zxd6OSAn58A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789217215; c=relaxed/simple; bh=hoi2w3bvSuJhrocWig5WBCjA4feynngKTU72O/aQfSs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Hh6H855kXS4+DckIZCoDVphr4Qc3JoRAhFX2IOHgCgcXX9Pvax9npvlLfiKd/O/xgl649yoZ4jrCe/uU81elIpMXWiaaLf+dXaZkpKaoxYe//58XUn2+0EFfwhQUIeGETgH6wehMAKZwwRuBMqEmr+bqKiju3+1gRZgrt9tleSQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=lE1vU7CQ; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="lE1vU7CQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 024891F000FF; Sat, 12 Sep 2026 12:46:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789217213; bh=X5rVuLEjfp0xn00ZuNHJzgWGPj0HEv+bgaHzXXCTZGA=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=lE1vU7CQ5CLHJFcOmEzHTXegXESBkxSk37MayRPf4k0pDg0kXgWhFWraxAD0oi1Cd C/uwW+D16H3UmSxaOIPgA/4YzPld1sC481PGZMW9U4UH3TMZYnM+bz/pToLM84ff5F 2Jf0O8hqYJdWUiIfqXh3pl2JU1ZWYgQamZWBRxL4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Donet Tom , Dev Jain , Baolin Wang , David Hildenbrand , "Ritesh Harjani (IBM)" , Shuah Khan , Zi Yan , Andrew Morton , Sasha Levin Subject: [PATCH 6.12 0896/1376] selftests/mm: add new test cases to the migration test Date: Sat, 12 Sep 2026 08:55:22 +0200 Message-ID: <20260912065627.532489586@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065607.535295758@linuxfoundation.org> References: <20260912065607.535295758@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Donet Tom [ Upstream commit 901083d8f5c55dc125834bbc5ac1720014e66758 ] Added three new test cases to the migration tests: 1. Shared anon THP migration test This test will mmap shared anon memory, madvise it to MADV_HUGEPAGE, then do migration entry testing. One thread will move pages back and forth between nodes whilst other threads try and access them. 2. Private anon hugetlb migration test This test will mmap private anon hugetlb memory and then do the migration entry testing. 3. Shared anon hugetlb migration test This test will mmap shared anon hugetlb memory and then do the migration entry testing. Test results ============ # ./tools/testing/selftests/mm/migration TAP version 13 1..6 # Starting 6 tests from 1 test cases. # RUN migration.private_anon ... # OK migration.private_anon ok 1 migration.private_anon # RUN migration.shared_anon ... # OK migration.shared_anon ok 2 migration.shared_anon # RUN migration.private_anon_thp ... # OK migration.private_anon_thp ok 3 migration.private_anon_thp # RUN migration.shared_anon_thp ... # OK migration.shared_anon_thp ok 4 migration.shared_anon_thp # RUN migration.private_anon_htlb ... # OK migration.private_anon_htlb ok 5 migration.private_anon_htlb # RUN migration.shared_anon_htlb ... # OK migration.shared_anon_htlb ok 6 migration.shared_anon_htlb # PASSED: 6 / 6 tests passed. # Totals: pass:6 fail:0 xfail:0 xpass:0 skip:0 error:0 # Link: https://lkml.kernel.org/r/20241219102720.4487-1-donettom@linux.ibm.com Signed-off-by: Donet Tom Reviewed-by: Dev Jain Cc: Baolin Wang Cc: David Hildenbrand Cc: Ritesh Harjani (IBM) Cc: Shuah Khan Cc: Zi Yan Signed-off-by: Andrew Morton Stable-dep-of: 15828a150c58 ("selftests/mm: fix ksm NUMA merge test for systems with memoryless NUMA nodes") Signed-off-by: Sasha Levin --- tools/testing/selftests/mm/migration.c | 99 ++++++++++++++++++++++++++ 1 file changed, 99 insertions(+) diff --git a/tools/testing/selftests/mm/migration.c b/tools/testing/selftests/mm/migration.c index c883ef420d3ba..cfd01e951e89c 100644 --- a/tools/testing/selftests/mm/migration.c +++ b/tools/testing/selftests/mm/migration.c @@ -205,4 +205,103 @@ TEST_F_TIMEOUT(migration, private_anon_thp, 2*RUNTIME) ASSERT_EQ(pthread_cancel(self->threads[i]), 0); } +/* + * migration test with shared anon THP page + */ + +TEST_F_TIMEOUT(migration, shared_anon_thp, 2*RUNTIME) +{ + pid_t pid; + uint64_t *ptr; + int i; + + if (self->nthreads < 2 || self->n1 < 0 || self->n2 < 0) + SKIP(return, "Not enough threads or NUMA nodes available"); + + ptr = mmap(NULL, 2 * TWOMEG, PROT_READ | PROT_WRITE, + MAP_SHARED | MAP_ANONYMOUS, -1, 0); + ASSERT_NE(ptr, MAP_FAILED); + + ptr = (uint64_t *) ALIGN((uintptr_t) ptr, TWOMEG); + ASSERT_EQ(madvise(ptr, TWOMEG, MADV_HUGEPAGE), 0); + + memset(ptr, 0xde, TWOMEG); + for (i = 0; i < self->nthreads - 1; i++) { + pid = fork(); + if (!pid) { + prctl(PR_SET_PDEATHSIG, SIGHUP); + /* Parent may have died before prctl so check now. */ + if (getppid() == 1) + kill(getpid(), SIGHUP); + access_mem(ptr); + } else { + self->pids[i] = pid; + } + } + + ASSERT_EQ(migrate(ptr, self->n1, self->n2), 0); + for (i = 0; i < self->nthreads - 1; i++) + ASSERT_EQ(kill(self->pids[i], SIGTERM), 0); +} + +/* + * migration test with private anon hugetlb page + */ +TEST_F_TIMEOUT(migration, private_anon_htlb, 2*RUNTIME) +{ + uint64_t *ptr; + int i; + + if (self->nthreads < 2 || self->n1 < 0 || self->n2 < 0) + SKIP(return, "Not enough threads or NUMA nodes available"); + + ptr = mmap(NULL, TWOMEG, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB, -1, 0); + ASSERT_NE(ptr, MAP_FAILED); + + memset(ptr, 0xde, TWOMEG); + for (i = 0; i < self->nthreads - 1; i++) + if (pthread_create(&self->threads[i], NULL, access_mem, ptr)) + perror("Couldn't create thread"); + + ASSERT_EQ(migrate(ptr, self->n1, self->n2), 0); + for (i = 0; i < self->nthreads - 1; i++) + ASSERT_EQ(pthread_cancel(self->threads[i]), 0); +} + +/* + * migration test with shared anon hugetlb page + */ +TEST_F_TIMEOUT(migration, shared_anon_htlb, 2*RUNTIME) +{ + pid_t pid; + uint64_t *ptr; + int i; + + if (self->nthreads < 2 || self->n1 < 0 || self->n2 < 0) + SKIP(return, "Not enough threads or NUMA nodes available"); + + ptr = mmap(NULL, TWOMEG, PROT_READ | PROT_WRITE, + MAP_SHARED | MAP_ANONYMOUS | MAP_HUGETLB, -1, 0); + ASSERT_NE(ptr, MAP_FAILED); + + memset(ptr, 0xde, TWOMEG); + for (i = 0; i < self->nthreads - 1; i++) { + pid = fork(); + if (!pid) { + prctl(PR_SET_PDEATHSIG, SIGHUP); + /* Parent may have died before prctl so check now. */ + if (getppid() == 1) + kill(getpid(), SIGHUP); + access_mem(ptr); + } else { + self->pids[i] = pid; + } + } + + ASSERT_EQ(migrate(ptr, self->n1, self->n2), 0); + for (i = 0; i < self->nthreads - 1; i++) + ASSERT_EQ(kill(self->pids[i], SIGTERM), 0); +} + TEST_HARNESS_MAIN -- 2.53.0