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Thu, 30 May 2024 02:54:21 -0700 (PDT) From: Nicholas Piggin To: qemu-devel@nongnu.org Cc: Nicholas Piggin , Peter Xu , Fabiano Rosas , Thomas Huth , Laurent Vivier , Paolo Bonzini Subject: [PATCH v2 1/4] tests/qtest/migration-test: Use regular file file for shared-memory tests Date: Thu, 30 May 2024 19:54:04 +1000 Message-ID: <20240530095408.31608-2-npiggin@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240530095408.31608-1-npiggin@gmail.com> References: <20240530095408.31608-1-npiggin@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::52c; envelope-from=npiggin@gmail.com; helo=mail-pg1-x52c.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1717062950558100001 Content-Type: text/plain; charset="utf-8" There is no need to use /dev/shm for file-backed memory devices, and on Gitlab CI the tmpfs mount is too small to be usable for migration tests. Switch to using a regular file in /tmp/ which will usually have more space available. Signed-off-by: Nicholas Piggin Reviewed-by: Prasad Pandit --- tests/qtest/migration-test.c | 34 +++++++++++++++------------------- 1 file changed, 15 insertions(+), 19 deletions(-) diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c index d6f5ceed80..8bbf45313d 100644 --- a/tests/qtest/migration-test.c +++ b/tests/qtest/migration-test.c @@ -552,7 +552,7 @@ typedef struct { * unconditionally, because it means the user would like to be verbose. */ bool hide_stderr; - bool use_shmem; + bool use_memfile; /* only launch the target process */ bool only_target; /* Use dirty ring if true; dirty logging otherwise */ @@ -672,21 +672,14 @@ static int test_migrate_start(QTestState **from, QTes= tState **to, g_autofree gchar *cmd_source =3D NULL; g_autofree gchar *cmd_target =3D NULL; const gchar *ignore_stderr; - g_autofree char *shmem_opts =3D NULL; - g_autofree char *shmem_path =3D NULL; + g_autofree char *memfile_opts =3D NULL; + g_autofree char *memfile_path =3D NULL; const char *kvm_opts =3D NULL; const char *arch =3D qtest_get_arch(); const char *memory_size; const char *machine_alias, *machine_opts =3D ""; g_autofree char *machine =3D NULL; =20 - if (args->use_shmem) { - if (!g_file_test("/dev/shm", G_FILE_TEST_IS_DIR)) { - g_test_skip("/dev/shm is not supported"); - return -1; - } - } - dst_state =3D (QTestMigrationState) { }; src_state =3D (QTestMigrationState) { }; bootfile_create(tmpfs, args->suspend_me); @@ -746,12 +739,12 @@ static int test_migrate_start(QTestState **from, QTes= tState **to, ignore_stderr =3D ""; } =20 - if (args->use_shmem) { - shmem_path =3D g_strdup_printf("/dev/shm/qemu-%d", getpid()); - shmem_opts =3D g_strdup_printf( + if (args->use_memfile) { + memfile_path =3D g_strdup_printf("/%s/qemu-%d", tmpfs, getpid()); + memfile_opts =3D g_strdup_printf( "-object memory-backend-file,id=3Dmem0,size=3D%s" ",mem-path=3D%s,share=3Don -numa node,memdev=3Dmem0", - memory_size, shmem_path); + memory_size, memfile_path); } =20 if (args->use_dirty_ring) { @@ -780,7 +773,7 @@ static int test_migrate_start(QTestState **from, QTestS= tate **to, memory_size, tmpfs, arch_opts ? arch_opts : "", arch_source ? arch_source : "", - shmem_opts ? shmem_opts : "", + memfile_opts ? memfile_opts : "", args->opts_source ? args->opts_source : "= ", ignore_stderr); if (!args->only_target) { @@ -802,7 +795,7 @@ static int test_migrate_start(QTestState **from, QTestS= tate **to, memory_size, tmpfs, uri, arch_opts ? arch_opts : "", arch_target ? arch_target : "", - shmem_opts ? shmem_opts : "", + memfile_opts ? memfile_opts : "", args->opts_target ? args->opts_target : "= ", ignore_stderr); *to =3D qtest_init_with_env(QEMU_ENV_DST, cmd_target); @@ -814,8 +807,8 @@ static int test_migrate_start(QTestState **from, QTestS= tate **to, * Remove shmem file immediately to avoid memory leak in test failed c= ase. * It's valid because QEMU has already opened this file */ - if (args->use_shmem) { - unlink(shmem_path); + if (args->use_memfile) { + unlink(memfile_path); } =20 return 0; @@ -1868,6 +1861,9 @@ static void test_ignore_shared(void) { g_autofree char *uri =3D g_strdup_printf("unix:%s/migsocket", tmpfs); QTestState *from, *to; + MigrateStart args =3D { + .use_memfile =3D true, + }; =20 if (test_migrate_start(&from, &to, uri, false, true, NULL, NULL)) { return; @@ -2024,7 +2020,7 @@ static void test_mode_reboot(void) g_autofree char *uri =3D g_strdup_printf("file:%s/%s", tmpfs, FILE_TEST_FILENAME); MigrateCommon args =3D { - .start.use_shmem =3D true, + .start.use_memfile =3D true, .connect_uri =3D uri, .listen_uri =3D "defer", .start_hook =3D test_mode_reboot_start --=20 2.43.0 From nobody Mon Nov 25 05:13:54 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=gmail.com ARC-Seal: i=1; a=rsa-sha256; t=1717062929; cv=none; d=zohomail.com; s=zohoarc; b=bC3C547KIrHwAzZU9hfSA0HqDXMjMGPAnqmknQL215SFumm8BVJ7x3Zd6ptuG2GbB4hgksMJOHzvnd52Xo56zVMzMc548x4S9msAytwPcEP8ybXQkp+T08ObScZCXODCNXWSvQxJ/1cFw0B/QT0aVIcZuwtPGa9gb4kHfIYMwp4= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1717062929; 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Thu, 30 May 2024 02:54:25 -0700 (PDT) From: Nicholas Piggin To: qemu-devel@nongnu.org Cc: Nicholas Piggin , Peter Xu , Fabiano Rosas , Thomas Huth , Laurent Vivier , Paolo Bonzini Subject: [PATCH v2 2/4] tests/qtest/migration-test: Enable test_mode_reboot Date: Thu, 30 May 2024 19:54:05 +1000 Message-ID: <20240530095408.31608-3-npiggin@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240530095408.31608-1-npiggin@gmail.com> References: <20240530095408.31608-1-npiggin@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::530; envelope-from=npiggin@gmail.com; helo=mail-pg1-x530.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1717062930648100001 Content-Type: text/plain; charset="utf-8" Fabiano pointed out this test probably is not flaky, just that it could not run under Gitlab CI due to very small shm filesystem size in that environment. Now that it has moved to use /tmp instead of /dev/shm files, enable it. Signed-off-by: Nicholas Piggin Reviewed-by: Fabiano Rosas --- tests/qtest/migration-test.c | 10 +--------- 1 file changed, 1 insertion(+), 9 deletions(-) diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c index 8bbf45313d..de380757be 100644 --- a/tests/qtest/migration-test.c +++ b/tests/qtest/migration-test.c @@ -3469,15 +3469,7 @@ int main(int argc, char **argv) test_precopy_file_offset); migration_test_add("/migration/precopy/file/offset/bad", test_precopy_file_offset_bad); - - /* - * Our CI system has problems with shared memory. - * Don't run this test until we find a workaround. - */ - if (getenv("QEMU_TEST_FLAKY_TESTS")) { - migration_test_add("/migration/mode/reboot", test_mode_reboot); - } - + migration_test_add("/migration/mode/reboot", test_mode_reboot); migration_test_add("/migration/precopy/file/mapped-ram", test_precopy_file_mapped_ram); migration_test_add("/migration/precopy/file/mapped-ram/live", --=20 2.43.0 From nobody Mon Nov 25 05:13:54 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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Thu, 30 May 2024 02:54:30 -0700 (PDT) From: Nicholas Piggin To: qemu-devel@nongnu.org Cc: Nicholas Piggin , Peter Xu , Fabiano Rosas , Thomas Huth , Laurent Vivier , Paolo Bonzini , Yury Kotov , "Dr . David Alan Gilbert" Subject: [PATCH v2 3/4] tests/qtest/migration-test: Fix and enable test_ignore_shared Date: Thu, 30 May 2024 19:54:06 +1000 Message-ID: <20240530095408.31608-4-npiggin@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240530095408.31608-1-npiggin@gmail.com> References: <20240530095408.31608-1-npiggin@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::431; envelope-from=npiggin@gmail.com; helo=mail-pf1-x431.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1717062938712100005 Content-Type: text/plain; charset="utf-8" This test is already starting to bitrot, so first remove it from ifdef and fix compile issues. ppc64 transfers about 2MB, so bump the size threshold too. It was said to be broken on aarch64 but it may have been due to the limited shm size under Gitlab CI. Now that it uses /tmp, enable it. Cc: Yury Kotov Cc: Dr. David Alan Gilbert Signed-off-by: Nicholas Piggin Reviewed-by: Dr. David Alan Gilbert --- tests/qtest/migration-test.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c index de380757be..86eace354e 100644 --- a/tests/qtest/migration-test.c +++ b/tests/qtest/migration-test.c @@ -1855,8 +1855,6 @@ static void test_precopy_unix_tls_x509_override_host(= void) #endif /* CONFIG_TASN1 */ #endif /* CONFIG_GNUTLS */ =20 -#if 0 -/* Currently upset on aarch64 TCG */ static void test_ignore_shared(void) { g_autofree char *uri =3D g_strdup_printf("unix:%s/migsocket", tmpfs); @@ -1865,7 +1863,7 @@ static void test_ignore_shared(void) .use_memfile =3D true, }; =20 - if (test_migrate_start(&from, &to, uri, false, true, NULL, NULL)) { + if (test_migrate_start(&from, &to, uri, &args)) { return; } =20 @@ -1890,11 +1888,11 @@ static void test_ignore_shared(void) wait_for_migration_complete(from); =20 /* Check whether shared RAM has been really skipped */ - g_assert_cmpint(read_ram_property_int(from, "transferred"), <, 1024 * = 1024); + g_assert_cmpint(read_ram_property_int(from, "transferred"), <, + 4 * 1024 * 1024); =20 test_migrate_end(from, to, true); } -#endif =20 static void * test_migrate_xbzrle_start(QTestState *from, @@ -3535,7 +3533,8 @@ int main(int argc, char **argv) #endif /* CONFIG_TASN1 */ #endif /* CONFIG_GNUTLS */ =20 - /* migration_test_add("/migration/ignore_shared", test_ignore_shared);= */ + migration_test_add("/migration/ignore_shared", test_ignore_shared); + #ifndef _WIN32 migration_test_add("/migration/precopy/fd/tcp", test_migrate_precopy_fd_socket); --=20 2.43.0 From nobody Mon Nov 25 05:13:54 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=gmail.com ARC-Seal: i=1; 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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::530; envelope-from=npiggin@gmail.com; helo=mail-pg1-x530.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @gmail.com) X-ZM-MESSAGEID: 1717062938548100002 Content-Type: text/plain; charset="utf-8" Postcopy requires userfaultfd support, which requires tmpfs if a memory file is used. This adds back support for /dev/shm memory files, but adds preallocation to skip environments where that mount is limited in size. Signed-off-by: Nicholas Piggin --- tests/qtest/migration-test.c | 77 ++++++++++++++++++++++++++++++++---- 1 file changed, 69 insertions(+), 8 deletions(-) diff --git a/tests/qtest/migration-test.c b/tests/qtest/migration-test.c index 86eace354e..5078033ded 100644 --- a/tests/qtest/migration-test.c +++ b/tests/qtest/migration-test.c @@ -11,6 +11,7 @@ */ =20 #include "qemu/osdep.h" +#include "qemu/cutils.h" =20 #include "libqtest.h" #include "qapi/qmp/qdict.h" @@ -553,6 +554,7 @@ typedef struct { */ bool hide_stderr; bool use_memfile; + bool use_shm_memfile; /* only launch the target process */ bool only_target; /* Use dirty ring if true; dirty logging otherwise */ @@ -739,7 +741,62 @@ static int test_migrate_start(QTestState **from, QTest= State **to, ignore_stderr =3D ""; } =20 - if (args->use_memfile) { + if (!qtest_has_machine(machine_alias)) { + g_autofree char *msg =3D g_strdup_printf("machine %s not supported= ", + machine_alias); + g_test_skip(msg); + return -1; + } + + if (args->use_shm_memfile) { +#if defined(__NR_userfaultfd) && defined(__linux__) + int fd; + uint64_t size; + + if (getenv("GITLAB_CI")) { + /* + * Gitlab runners are limited to 64MB shm size and despite + * pre-allocation there is concern that concurrent tests + * could result in nondeterministic failures. Until all shm + * usage in all CI tests is found to fail gracefully on + * ENOSPC, it is safer to avoid large allocations for now. + * + * https://lore.kernel.org/qemu-devel/875xuwg4mx.fsf@suse.de/ + */ + g_test_skip("shm tests are not supported in Gitlab CI environm= ent"); + return -1; + } + + if (!g_file_test("/dev/shm", G_FILE_TEST_IS_DIR)) { + g_test_skip("/dev/shm does not exist or is not a directory"); + return -1; + } + + /* + * Pre-create and allocate the file here, because /dev/shm/ + * is known to be limited in size in some places (e.g., Gitlab CI). + */ + memfile_path =3D g_strdup_printf("/dev/shm/qemu-%d", getpid()); + fd =3D open(memfile_path, O_WRONLY | O_CREAT | O_EXCL, S_IRUSR | S= _IWUSR); + if (fd =3D=3D -1) { + g_test_skip("/dev/shm file could not be created"); + return -1; + } + + g_assert(qemu_strtosz(memory_size, NULL, &size) =3D=3D 0); + size +=3D 64*1024; /* QEMU may map a bit more memory for a guard p= age */ + + if (fallocate(fd, 0, 0, size) =3D=3D -1) { + unlink(memfile_path); + perror("could not alloc"); exit(1); + g_test_skip("Could not allocate machine memory in /dev/shm"); + return -1; + } + close(fd); +#else + g_test_skip("userfaultfd is not supported"); +#endif + } else if (args->use_memfile) { memfile_path =3D g_strdup_printf("/%s/qemu-%d", tmpfs, getpid()); memfile_opts =3D g_strdup_printf( "-object memory-backend-file,id=3Dmem0,size=3D%s" @@ -751,12 +808,6 @@ static int test_migrate_start(QTestState **from, QTest= State **to, kvm_opts =3D ",dirty-ring-size=3D4096"; } =20 - if (!qtest_has_machine(machine_alias)) { - g_autofree char *msg =3D g_strdup_printf("machine %s not supported= ", machine_alias); - g_test_skip(msg); - return -1; - } - machine =3D resolve_machine_version(machine_alias, QEMU_ENV_SRC, QEMU_ENV_DST); =20 @@ -807,7 +858,7 @@ static int test_migrate_start(QTestState **from, QTestS= tate **to, * Remove shmem file immediately to avoid memory leak in test failed c= ase. * It's valid because QEMU has already opened this file */ - if (args->use_memfile) { + if (args->use_memfile || args->use_shm_memfile) { unlink(memfile_path); } =20 @@ -1275,6 +1326,15 @@ static void test_postcopy(void) test_postcopy_common(&args); } =20 +static void test_postcopy_memfile(void) +{ + MigrateCommon args =3D { + .start.use_shm_memfile =3D true, + }; + + test_postcopy_common(&args); +} + static void test_postcopy_suspend(void) { MigrateCommon args =3D { @@ -3441,6 +3501,7 @@ int main(int argc, char **argv) =20 if (has_uffd) { migration_test_add("/migration/postcopy/plain", test_postcopy); + migration_test_add("/migration/postcopy/memfile", test_postcopy_me= mfile); migration_test_add("/migration/postcopy/recovery/plain", test_postcopy_recovery); migration_test_add("/migration/postcopy/preempt/plain", --=20 2.43.0