October 2022 - Linux-kselftest-mirror

kselftest/next kselftest-lkdtm: 3 runs, 3 regressions (v6.1-rc1-5-gec7b4511185b)

by kernelci.org bot

kselftest/next kselftest-lkdtm: 3 runs, 3 regressions (v6.1-rc1-5-gec7b4511185b) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+---------------+----------+------------------------------+------------ imx6q-sabrelite | arm | lab-collabora | gcc-10 | multi_v7_defconfig+kselftest | 1 mt8173-elm-hana | arm64 | lab-collabora | gcc-10 | defconfig+kse...4-chromebook | 1 mt8183-kukui-...uniper-sku16 | arm64 | lab-collabora | gcc-10 | defconfig+kse...4-chromebook | 1 Details: https://kernelci.org/test/job/kselftest/branch/next/kernel/v6.1-rc1-5-gec7b… Test: kselftest-lkdtm Tree: kselftest Branch: next Describe: v6.1-rc1-5-gec7b4511185b URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: ec7b4511185bba95fc702c33a388582c8842d454 Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+---------------+----------+------------------------------+------------ imx6q-sabrelite | arm | lab-collabora | gcc-10 | multi_v7_defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/6358cc8cc32197fbba5e5b41 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: multi_v7_defconfig+kselftest Compiler: gcc-10 (arm-linux-gnueabihf-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//kselftest/next/v6.1-rc1-5-gec7b4511185b/arm/m… HTML log: https://storage.kernelci.org//kselftest/next/v6.1-rc1-5-gec7b4511185b/arm/m… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bullseye-kselftest/2022100… * kselftest-lkdtm.login: https://kernelci.org/test/case/id/6358cc8cc32197fbba5e5b42 failing since 64 days (last pass: v6.0-rc1-1-gf1227dc7d0411, first fail: linux-kselftest-next-6.0-rc2-1-gab7039dbcc61) platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+---------------+----------+------------------------------+------------ mt8173-elm-hana | arm64 | lab-collabora | gcc-10 | defconfig+kse...4-chromebook | 1 Details: https://kernelci.org/test/plan/id/6358cbd2e100c36c595e5c58 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest+arm64-chromebook Compiler: gcc-10 (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//kselftest/next/v6.1-rc1-5-gec7b4511185b/arm64… HTML log: https://storage.kernelci.org//kselftest/next/v6.1-rc1-5-gec7b4511185b/arm64… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bullseye-kselftest/2022100… * kselftest-lkdtm.login: https://kernelci.org/test/case/id/6358cbd2e100c36c595e5c59 failing since 8 days (last pass: linux-kselftest-next-6.0-rc2-11-g144eeb2fc761, first fail: v6.1-rc1) platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+---------------+----------+------------------------------+------------ mt8183-kukui-...uniper-sku16 | arm64 | lab-collabora | gcc-10 | defconfig+kse...4-chromebook | 1 Details: https://kernelci.org/test/plan/id/6358c7d6b7caaf4a875e5bea Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest+arm64-chromebook Compiler: gcc-10 (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//kselftest/next/v6.1-rc1-5-gec7b4511185b/arm64… HTML log: https://storage.kernelci.org//kselftest/next/v6.1-rc1-5-gec7b4511185b/arm64… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bullseye-kselftest/2022100… * kselftest-lkdtm.login: https://kernelci.org/test/case/id/6358c7d6b7caaf4a875e5beb failing since 8 days (last pass: linux-kselftest-next-6.0-rc2-11-g144eeb2fc761, first fail: v6.1-rc1)

2 years, 1 month

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kselftest/next kselftest-livepatch: 2 runs, 1 regressions (v6.1-rc1-5-gec7b4511185b)

by kernelci.org bot

kselftest/next kselftest-livepatch: 2 runs, 1 regressions (v6.1-rc1-5-gec7b4511185b) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions ----------------+-------+---------------+----------+------------------------------+------------ mt8173-elm-hana | arm64 | lab-collabora | gcc-10 | defconfig+kse...4-chromebook | 1 Details: https://kernelci.org/test/job/kselftest/branch/next/kernel/v6.1-rc1-5-gec7b… Test: kselftest-livepatch Tree: kselftest Branch: next Describe: v6.1-rc1-5-gec7b4511185b URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: ec7b4511185bba95fc702c33a388582c8842d454 Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions ----------------+-------+---------------+----------+------------------------------+------------ mt8173-elm-hana | arm64 | lab-collabora | gcc-10 | defconfig+kse...4-chromebook | 1 Details: https://kernelci.org/test/plan/id/6358cae5a3f7ebfabf5e5b78 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest+arm64-chromebook Compiler: gcc-10 (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//kselftest/next/v6.1-rc1-5-gec7b4511185b/arm64… HTML log: https://storage.kernelci.org//kselftest/next/v6.1-rc1-5-gec7b4511185b/arm64… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bullseye-kselftest/2022100… * kselftest-livepatch.login: https://kernelci.org/test/case/id/6358cae5a3f7ebfabf5e5b79 failing since 8 days (last pass: linux-kselftest-next-6.0-rc2-11-g144eeb2fc761, first fail: v6.1-rc1)

2 years, 1 month

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kselftest/next kselftest-lib: 7 runs, 5 regressions (v6.1-rc1-5-gec7b4511185b)

by kernelci.org bot

kselftest/next kselftest-lib: 7 runs, 5 regressions (v6.1-rc1-5-gec7b4511185b) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+---------------+----------+------------------------------+------------ meson-g12b-a311d-khadas-vim3 | arm64 | lab-baylibre | clang-15 | defconfig+kselftest | 1 meson-g12b-a311d-khadas-vim3 | arm64 | lab-collabora | clang-15 | defconfig+kselftest | 1 meson-g12b-a311d-khadas-vim3 | arm64 | lab-baylibre | gcc-10 | defconfig+kselftest | 1 meson-g12b-a311d-khadas-vim3 | arm64 | lab-collabora | gcc-10 | defconfig+kselftest | 1 mt8173-elm-hana | arm64 | lab-collabora | gcc-10 | defconfig+kse...4-chromebook | 1 Details: https://kernelci.org/test/job/kselftest/branch/next/kernel/v6.1-rc1-5-gec7b… Test: kselftest-lib Tree: kselftest Branch: next Describe: v6.1-rc1-5-gec7b4511185b URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: ec7b4511185bba95fc702c33a388582c8842d454 Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+---------------+----------+------------------------------+------------ meson-g12b-a311d-khadas-vim3 | arm64 | lab-baylibre | clang-15 | defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/6358cca9f196096ce05e5b3f Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest Compiler: clang-15 (Debian clang version 15.0.2-++20221003113153+5f620d003fda-1~exp1~20221003113249.70) Plain log: https://storage.kernelci.org//kselftest/next/v6.1-rc1-5-gec7b4511185b/arm64… HTML log: https://storage.kernelci.org//kselftest/next/v6.1-rc1-5-gec7b4511185b/arm64… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bullseye-kselftest/2022100… * kselftest-lib.login: https://kernelci.org/test/case/id/6358cca9f196096ce05e5b40 failing since 8 days (last pass: linux-kselftest-next-6.0-rc2-11-g144eeb2fc761, first fail: v6.1-rc1) platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+---------------+----------+------------------------------+------------ meson-g12b-a311d-khadas-vim3 | arm64 | lab-collabora | clang-15 | defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/6358c6a8ffb9c4124d5e5b3c Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest Compiler: clang-15 (Debian clang version 15.0.2-++20221003113153+5f620d003fda-1~exp1~20221003113249.70) Plain log: https://storage.kernelci.org//kselftest/next/v6.1-rc1-5-gec7b4511185b/arm64… HTML log: https://storage.kernelci.org//kselftest/next/v6.1-rc1-5-gec7b4511185b/arm64… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bullseye-kselftest/2022100… * kselftest-lib.login: https://kernelci.org/test/case/id/6358c6a8ffb9c4124d5e5b3d failing since 8 days (last pass: linux-kselftest-next-6.0-rc2-11-g144eeb2fc761, first fail: v6.1-rc1) platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+---------------+----------+------------------------------+------------ meson-g12b-a311d-khadas-vim3 | arm64 | lab-baylibre | gcc-10 | defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/6358ccbcf196096ce05e5bb7 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest Compiler: gcc-10 (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//kselftest/next/v6.1-rc1-5-gec7b4511185b/arm64… HTML log: https://storage.kernelci.org//kselftest/next/v6.1-rc1-5-gec7b4511185b/arm64… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bullseye-kselftest/2022100… * kselftest-lib.login: https://kernelci.org/test/case/id/6358ccbcf196096ce05e5bb8 failing since 8 days (last pass: linux-kselftest-next-6.0-rc2-11-g144eeb2fc761, first fail: v6.1-rc1) platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+---------------+----------+------------------------------+------------ meson-g12b-a311d-khadas-vim3 | arm64 | lab-collabora | gcc-10 | defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/6358c58b4cf45c92e35e5b49 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest Compiler: gcc-10 (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//kselftest/next/v6.1-rc1-5-gec7b4511185b/arm64… HTML log: https://storage.kernelci.org//kselftest/next/v6.1-rc1-5-gec7b4511185b/arm64… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bullseye-kselftest/2022100… * kselftest-lib.login: https://kernelci.org/test/case/id/6358c58b4cf45c92e35e5b4a failing since 8 days (last pass: linux-kselftest-next-6.0-rc2-11-g144eeb2fc761, first fail: v6.1-rc1) platform | arch | lab | compiler | defconfig | regressions -----------------------------+-------+---------------+----------+------------------------------+------------ mt8173-elm-hana | arm64 | lab-collabora | gcc-10 | defconfig+kse...4-chromebook | 1 Details: https://kernelci.org/test/plan/id/6358cb6bbf48e7cbbd5e5b68 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest+arm64-chromebook Compiler: gcc-10 (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//kselftest/next/v6.1-rc1-5-gec7b4511185b/arm64… HTML log: https://storage.kernelci.org//kselftest/next/v6.1-rc1-5-gec7b4511185b/arm64… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bullseye-kselftest/2022100… * kselftest-lib.login: https://kernelci.org/test/case/id/6358cb6bbf48e7cbbd5e5b69 failing since 8 days (last pass: linux-kselftest-next-6.0-rc2-11-g144eeb2fc761, first fail: v6.1-rc1)

2 years, 1 month

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kselftest/next kselftest-cpufreq: 1 runs, 1 regressions (v6.1-rc1-5-gec7b4511185b)

by kernelci.org bot

kselftest/next kselftest-cpufreq: 1 runs, 1 regressions (v6.1-rc1-5-gec7b4511185b) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions ----------------+-------+---------------+----------+------------------------------+------------ mt8173-elm-hana | arm64 | lab-collabora | gcc-10 | defconfig+kse...4-chromebook | 1 Details: https://kernelci.org/test/job/kselftest/branch/next/kernel/v6.1-rc1-5-gec7b… Test: kselftest-cpufreq Tree: kselftest Branch: next Describe: v6.1-rc1-5-gec7b4511185b URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: ec7b4511185bba95fc702c33a388582c8842d454 Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions ----------------+-------+---------------+----------+------------------------------+------------ mt8173-elm-hana | arm64 | lab-collabora | gcc-10 | defconfig+kse...4-chromebook | 1 Details: https://kernelci.org/test/plan/id/6358cb03d3a9368a545e5b62 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: defconfig+kselftest+arm64-chromebook Compiler: gcc-10 (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110) Plain log: https://storage.kernelci.org//kselftest/next/v6.1-rc1-5-gec7b4511185b/arm64… HTML log: https://storage.kernelci.org//kselftest/next/v6.1-rc1-5-gec7b4511185b/arm64… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bullseye-kselftest/2022100… * kselftest-cpufreq.login: https://kernelci.org/test/case/id/6358cb03d3a9368a545e5b63 failing since 8 days (last pass: linux-kselftest-next-6.0-rc2-11-g144eeb2fc761, first fail: v6.1-rc1)

2 years, 1 month

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kselftest/next build: 7 builds: 0 failed, 7 passed, 2 errors (v6.1-rc1-5-gec7b4511185b)

by kernelci.org bot

kselftest/next build: 7 builds: 0 failed, 7 passed, 2 errors (v6.1-rc1-5-gec7b4511185b) Full Build Summary: https://kernelci.org/build/kselftest/branch/next/kernel/v6.1-rc1-5-gec7b451… Tree: kselftest Branch: next Git Describe: v6.1-rc1-5-gec7b4511185b Git Commit: ec7b4511185bba95fc702c33a388582c8842d454 Git URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git Built: 4 unique architectures Errors Detected: arm64: defconfig+kselftest (clang-15): 1 error arm: i386: x86_64: x86_64_defconfig+kselftest (clang-15): 1 error Errors summary: 2 error: write on a pipe with no reader ================================================================================ Detailed per-defconfig build reports: -------------------------------------------------------------------------------- defconfig+kselftest (arm64, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest (arm64, clang-15) — PASS, 1 error, 0 warnings, 0 section mismatches Errors: error: write on a pipe with no reader -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- i386_defconfig+kselftest (i386, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- multi_v7_defconfig+kselftest (arm, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, clang-15) — PASS, 1 error, 0 warnings, 0 section mismatches Errors: error: write on a pipe with no reader --- For more info write to <info(a)kernelci.org>

2 years, 1 month

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[PATCH v2 1/3] kunit: Provide a static key to check if KUnit is actively running tests

by David Gow

KUnit does a few expensive things when enabled. This hasn't been a problem because KUnit was only enabled on test kernels, but with a few people enabling (but not _using_) KUnit on production systems, we need a runtime way of handling this. Provide a 'kunit_running' static key (defaulting to false), which allows us to hide any KUnit code behind a static branch. This should reduce the performance impact (on other code) of having KUnit enabled to a single NOP when no tests are running. Note that, while it looks unintuitive, tests always run entirely within __kunit_test_suites_init(), so it's safe to decrement the static key at the end of this function, rather than in __kunit_test_suites_exit(), which is only there to clean up results in debugfs. Signed-off-by: David Gow <davidgow(a)google.com> --- This should be a no-op (other than a possible performance improvement) functionality-wise, and lays the groundwork for a more optimised static stub implementation. The remaining patches in the series add a kunit_get_current_test() function which is a more friendly and performant wrapper around current->kunit_test, and use this in the slub test. They also improve the documentation a bit. If there are no objections, we'll take the whole series via the KUnit tree. Changes since v1: https://lore.kernel.org/linux-kselftest/20221021072854.333010-1-davidgow@go… - No changes in this patch. - Patch 2/3 is reworked, patch 3/3 is new. --- include/kunit/test.h | 4 ++++ lib/kunit/test.c | 6 ++++++ 2 files changed, 10 insertions(+) diff --git a/include/kunit/test.h b/include/kunit/test.h index b1ab6b32216d..450a778a039e 100644 --- a/include/kunit/test.h +++ b/include/kunit/test.h @@ -16,6 +16,7 @@ #include <linux/container_of.h> #include <linux/err.h> #include <linux/init.h> +#include <linux/jump_label.h> #include <linux/kconfig.h> #include <linux/kref.h> #include <linux/list.h> @@ -27,6 +28,9 @@ #include <asm/rwonce.h> +/* Static key: true if any KUnit tests are currently running */ +extern struct static_key_false kunit_running; + struct kunit; /* Size of log associated with test. */ diff --git a/lib/kunit/test.c b/lib/kunit/test.c index 90640a43cf62..314717b63080 100644 --- a/lib/kunit/test.c +++ b/lib/kunit/test.c @@ -20,6 +20,8 @@ #include "string-stream.h" #include "try-catch-impl.h" +DEFINE_STATIC_KEY_FALSE(kunit_running); + #if IS_BUILTIN(CONFIG_KUNIT) /* * Fail the current test and print an error message to the log. @@ -612,10 +614,14 @@ int __kunit_test_suites_init(struct kunit_suite * const * const suites, int num_ return 0; } + static_branch_inc(&kunit_running); + for (i = 0; i < num_suites; i++) { kunit_init_suite(suites[i]); kunit_run_tests(suites[i]); } + + static_branch_dec(&kunit_running); return 0; } EXPORT_SYMBOL_GPL(__kunit_test_suites_init); -- 2.38.0.135.g90850a2211-goog

2 years, 1 month

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[PATCH] Documentation: kunit: Remove redundant 'tips.rst' page

by David Gow

The contents of 'tips.rst' was included in 'usage.rst' way back in commit 953574390634 ("Documentation: KUnit: Rework writing page to focus on writing tests"), but the tips page remained behind as well. Therefore, delete 'tips.rst' While I regret breaking any links to 'tips' which might exist externally, it's confusing to have two subtly different versions of the same content around. Signed-off-by: David Gow <davidgow(a)google.com> --- Documentation/dev-tools/kunit/index.rst | 1 - Documentation/dev-tools/kunit/tips.rst | 190 ------------------------ 2 files changed, 191 deletions(-) delete mode 100644 Documentation/dev-tools/kunit/tips.rst diff --git a/Documentation/dev-tools/kunit/index.rst b/Documentation/dev-tools/kunit/index.rst index f5d13f1d37be..d5629817cd72 100644 --- a/Documentation/dev-tools/kunit/index.rst +++ b/Documentation/dev-tools/kunit/index.rst @@ -16,7 +16,6 @@ KUnit - Linux Kernel Unit Testing api/index style faq - tips running_tips This section details the kernel unit testing framework. diff --git a/Documentation/dev-tools/kunit/tips.rst b/Documentation/dev-tools/kunit/tips.rst deleted file mode 100644 index 492d2ded2f5a..000000000000 --- a/Documentation/dev-tools/kunit/tips.rst +++ /dev/null @@ -1,190 +0,0 @@ -.. SPDX-License-Identifier: GPL-2.0 - -============================ -Tips For Writing KUnit Tests -============================ - -Exiting early on failed expectations ------------------------------------- - -``KUNIT_EXPECT_EQ`` and friends will mark the test as failed and continue -execution. In some cases, it's unsafe to continue and you can use the -``KUNIT_ASSERT`` variant to exit on failure. - -.. code-block:: c - - void example_test_user_alloc_function(struct kunit *test) - { - void *object = alloc_some_object_for_me(); - - /* Make sure we got a valid pointer back. */ - KUNIT_ASSERT_NOT_ERR_OR_NULL(test, object); - do_something_with_object(object); - } - -Allocating memory ------------------ - -Where you would use ``kzalloc``, you should prefer ``kunit_kzalloc`` instead. -KUnit will ensure the memory is freed once the test completes. - -This is particularly useful since it lets you use the ``KUNIT_ASSERT_EQ`` -macros to exit early from a test without having to worry about remembering to -call ``kfree``. - -Example: - -.. code-block:: c - - void example_test_allocation(struct kunit *test) - { - char *buffer = kunit_kzalloc(test, 16, GFP_KERNEL); - /* Ensure allocation succeeded. */ - KUNIT_ASSERT_NOT_ERR_OR_NULL(test, buffer); - - KUNIT_ASSERT_STREQ(test, buffer, ""); - } - - -Testing static functions ------------------------- - -If you don't want to expose functions or variables just for testing, one option -is to conditionally ``#include`` the test file at the end of your .c file, e.g. - -.. code-block:: c - - /* In my_file.c */ - - static int do_interesting_thing(); - - #ifdef CONFIG_MY_KUNIT_TEST - #include "my_kunit_test.c" - #endif - -Injecting test-only code ------------------------- - -Similarly to the above, it can be useful to add test-specific logic. - -.. code-block:: c - - /* In my_file.h */ - - #ifdef CONFIG_MY_KUNIT_TEST - /* Defined in my_kunit_test.c */ - void test_only_hook(void); - #else - void test_only_hook(void) { } - #endif - -This test-only code can be made more useful by accessing the current kunit -test, see below. - -Accessing the current test --------------------------- - -In some cases, you need to call test-only code from outside the test file, e.g. -like in the example above or if you're providing a fake implementation of an -ops struct. -There is a ``kunit_test`` field in ``task_struct``, so you can access it via -``current->kunit_test``. - -Here's a slightly in-depth example of how one could implement "mocking": - -.. code-block:: c - - #include <linux/sched.h> /* for current */ - - struct test_data { - int foo_result; - int want_foo_called_with; - }; - - static int fake_foo(int arg) - { - struct kunit *test = current->kunit_test; - struct test_data *test_data = test->priv; - - KUNIT_EXPECT_EQ(test, test_data->want_foo_called_with, arg); - return test_data->foo_result; - } - - static void example_simple_test(struct kunit *test) - { - /* Assume priv is allocated in the suite's .init */ - struct test_data *test_data = test->priv; - - test_data->foo_result = 42; - test_data->want_foo_called_with = 1; - - /* In a real test, we'd probably pass a pointer to fake_foo somewhere - * like an ops struct, etc. instead of calling it directly. */ - KUNIT_EXPECT_EQ(test, fake_foo(1), 42); - } - - -Note: here we're able to get away with using ``test->priv``, but if you wanted -something more flexible you could use a named ``kunit_resource``, see -Documentation/dev-tools/kunit/api/test.rst. - -Failing the current test ------------------------- - -But sometimes, you might just want to fail the current test. In that case, we -have ``kunit_fail_current_test(fmt, args...)`` which is defined in ``<kunit/test-bug.h>`` and -doesn't require pulling in ``<kunit/test.h>``. - -E.g. say we had an option to enable some extra debug checks on some data structure: - -.. code-block:: c - - #include <kunit/test-bug.h> - - #ifdef CONFIG_EXTRA_DEBUG_CHECKS - static void validate_my_data(struct data *data) - { - if (is_valid(data)) - return; - - kunit_fail_current_test("data %p is invalid", data); - - /* Normal, non-KUnit, error reporting code here. */ - } - #else - static void my_debug_function(void) { } - #endif - - -Customizing error messages --------------------------- - -Each of the ``KUNIT_EXPECT`` and ``KUNIT_ASSERT`` macros have a ``_MSG`` variant. -These take a format string and arguments to provide additional context to the automatically generated error messages. - -.. code-block:: c - - char some_str[41]; - generate_sha1_hex_string(some_str); - - /* Before. Not easy to tell why the test failed. */ - KUNIT_EXPECT_EQ(test, strlen(some_str), 40); - - /* After. Now we see the offending string. */ - KUNIT_EXPECT_EQ_MSG(test, strlen(some_str), 40, "some_str='%s'", some_str); - -Alternatively, one can take full control over the error message by using ``KUNIT_FAIL()``, e.g. - -.. code-block:: c - - /* Before */ - KUNIT_EXPECT_EQ(test, some_setup_function(), 0); - - /* After: full control over the failure message. */ - if (some_setup_function()) - KUNIT_FAIL(test, "Failed to setup thing for testing"); - -Next Steps -========== -* Optional: see the Documentation/dev-tools/kunit/usage.rst page for a more - in-depth explanation of KUnit. -- 2.38.0.135.g90850a2211-goog

2 years, 1 month

2
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[PATCH 0/4] mm/damon/reclaim,lru_sort: enable/disable synchronously

by SeongJae Park

Writing a value to DAMON_RECLAIM and DAMON_LRU_SORT's 'enabled' parameters turns on or off DAMON in an ansychronous way. This means the parameter cannot be used to read the current status of them. 'kdamond_pid' parameter should be used instead for the purpose. The documentation is easy to be read as it works in a synchronous way, so it is a little bit confusing. It also makes the user space tooling dirty. There's no real reason to have the asynchronous behavior, though. Simply make the parameter works synchronously, rather than updating the document. The first and second patches changes the behavior of the 'enabled' parameter for DAMON_RECLAIM and adds a selftest for the changed behavior, respectively. Following two patches make the same changes for DAMON_LRU_SORT. SeongJae Park (4): mm/damon/reclaim: enable and disable synchronously selftests/damon: add tests for DAMON_RECLAIM's enabled parameter mm/damon/lru_sort: enable and disable synchronously selftests/damon: add tests for DAMON_LRU_SORT's enabled parameter mm/damon/lru_sort.c | 51 ++++++++++------------ mm/damon/reclaim.c | 53 ++++++++++------------- tools/testing/selftests/damon/Makefile | 1 + tools/testing/selftests/damon/lru_sort.sh | 41 ++++++++++++++++++ tools/testing/selftests/damon/reclaim.sh | 42 ++++++++++++++++++ 5 files changed, 129 insertions(+), 59 deletions(-) create mode 100755 tools/testing/selftests/damon/lru_sort.sh create mode 100755 tools/testing/selftests/damon/reclaim.sh -- 2.25.1

2 years, 1 month

1
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[PATCH v4 00/23] SMM emulation and interrupt shadow fixes

by Maxim Levitsky

This patch series is a result of long debug work to find out why sometimes guests with win11 secure boot were failing during boot. During writing a unit test I found another bug, turns out that on rsm emulation, if the rsm instruction was done in real or 32 bit mode, KVM would truncate the restored RIP to 32 bit. I also refactored the way we write SMRAM so it is easier now to understand what is going on. The main bug in this series which I fixed is that we allowed #SMI to happen during the STI interrupt shadow, and we did nothing to both reset it on #SMI handler entry and restore it on RSM. V4: - rebased on top of patch series from Paolo which allows smm support to be disabled by Kconfig option. - addressed review feedback. I included these patches in the series for reference. Best regards, Maxim Levitsky Maxim Levitsky (15): bug: introduce ASSERT_STRUCT_OFFSET KVM: x86: emulator: em_sysexit should update ctxt->mode KVM: x86: emulator: introduce emulator_recalc_and_set_mode KVM: x86: emulator: update the emulation mode after rsm KVM: x86: emulator: update the emulation mode after CR0 write KVM: x86: smm: number of GPRs in the SMRAM image depends on the image format KVM: x86: smm: check for failures on smm entry KVM: x86: smm: add structs for KVM's smram layout KVM: x86: smm: use smram structs in the common code KVM: x86: smm: use smram struct for 32 bit smram load/restore KVM: x86: smm: use smram struct for 64 bit smram load/restore KVM: svm: drop explicit return value of kvm_vcpu_map KVM: x86: SVM: use smram structs KVM: x86: SVM: don't save SVM state to SMRAM when VM is not long mode capable KVM: x86: smm: preserve interrupt shadow in SMRAM Paolo Bonzini (8): KVM: x86: start moving SMM-related functions to new files KVM: x86: move SMM entry to a new file KVM: x86: move SMM exit to a new file KVM: x86: do not go through ctxt->ops when emulating rsm KVM: allow compiling out SMM support KVM: x86: compile out vendor-specific code if SMM is disabled KVM: x86: remove SMRAM address space if SMM is not supported KVM: x86: do not define KVM_REQ_SMI if SMM disabled arch/x86/include/asm/kvm-x86-ops.h | 2 + arch/x86/include/asm/kvm_host.h | 29 +- arch/x86/kvm/Kconfig | 11 + arch/x86/kvm/Makefile | 1 + arch/x86/kvm/emulate.c | 458 +++---------- arch/x86/kvm/kvm_cache_regs.h | 5 - arch/x86/kvm/kvm_emulate.h | 47 +- arch/x86/kvm/lapic.c | 14 +- arch/x86/kvm/lapic.h | 7 +- arch/x86/kvm/mmu/mmu.c | 1 + arch/x86/kvm/smm.c | 637 ++++++++++++++++++ arch/x86/kvm/smm.h | 160 +++++ arch/x86/kvm/svm/nested.c | 3 + arch/x86/kvm/svm/svm.c | 43 +- arch/x86/kvm/vmx/nested.c | 1 + arch/x86/kvm/vmx/vmcs12.h | 5 +- arch/x86/kvm/vmx/vmx.c | 11 +- arch/x86/kvm/x86.c | 353 +--------- include/linux/build_bug.h | 9 + tools/testing/selftests/kvm/x86_64/smm_test.c | 2 + 20 files changed, 1031 insertions(+), 768 deletions(-) create mode 100644 arch/x86/kvm/smm.c create mode 100644 arch/x86/kvm/smm.h -- 2.34.3

2 years, 1 month

1
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[PATCH net 0/2] openvswitch: syzbot splat fix and introduce selftest

by Aaron Conole

Syzbot recently caught a splat when dropping features from openvswitch datapaths that are in-use. The WARN() call is definitely too large a hammer for the situation, so change to pr_warn. Second patch in the series introduces a new selftest suite which can help show that an issue is fixed. This change might be more suited to net-next tree, so it has been separated out as an additional patch and can be either applied to either tree based on preference. Aaron Conole (2): openvswitch: switch from WARN to pr_warn selftests: add openvswitch selftest suite MAINTAINERS | 1 + net/openvswitch/datapath.c | 3 +- tools/testing/selftests/Makefile | 1 + .../selftests/net/openvswitch/Makefile | 13 + .../selftests/net/openvswitch/openvswitch.sh | 216 +++++++++ .../selftests/net/openvswitch/ovs-dpctl.py | 411 ++++++++++++++++++ 6 files changed, 644 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/net/openvswitch/Makefile create mode 100755 tools/testing/selftests/net/openvswitch/openvswitch.sh create mode 100644 tools/testing/selftests/net/openvswitch/ovs-dpctl.py -- 2.34.3

2 years, 1 month

2
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