- Linux-kselftest-mirror - lists.linaro.org

[PATCH v4 0/6] mm/migrate: avoid device private invalidations

by Ralph Campbell

The goal for this series is to avoid device private memory TLB invalidations when migrating a range of addresses from system memory to device private memory and some of those pages have already been migrated. The approach taken is to introduce a new mmu notifier invalidation event type and use that in the device driver to skip invalidation callbacks from migrate_vma_setup(). The device driver is also then expected to handle device MMU invalidations as part of the migrate_vma_setup(), migrate_vma_pages(), migrate_vma_finalize() process. Note that this is opt-in. A device driver can simply invalidate its MMU in the mmu notifier callback and not handle MMU invalidations in the migration sequence. This series is based on Jason Gunthorpe's HMM tree (linux-5.8.0-rc4). Also, this replaces the need for the following two patches I sent: ("mm: fix migrate_vma_setup() src_owner and normal pages") https://lore.kernel.org/linux-mm/20200622222008.9971-1-rcampbell@nvidia.com ("nouveau: fix mixed normal and device private page migration") https://lore.kernel.org/lkml/20200622233854.10889-3-rcampbell@nvidia.com Changes in v4: Added reviewed-by from Bharata B Rao. Removed dead code checking for source device private page in lib/test_hmm.c dmirror_migrate_alloc_and_copy() since the source filter flag guarantees that. Added patch 6 to remove a redundant invalidation in migrate_vma_pages(). Changes in v3: Changed the direction field "dir" to a "flags" field and renamed src_owner to pgmap_owner. Fixed a locking issue in nouveau for the migration invalidation. Added a HMM selftest test case to exercise the HMM test driver invalidation changes. Removed reviewed-by Bharata B Rao since this version is moderately changed. Changes in v2: Rebase to Jason Gunthorpe's HMM tree. Added reviewed-by from Bharata B Rao. Rename the mmu_notifier_range::data field to migrate_pgmap_owner as suggested by Jason Gunthorpe. Ralph Campbell (6): nouveau: fix storing invalid ptes mm/migrate: add a flags parameter to migrate_vma mm/notifier: add migration invalidation type nouveau/svm: use the new migration invalidation mm/hmm/test: use the new migration invalidation mm/migrate: remove range invalidation in migrate_vma_pages() arch/powerpc/kvm/book3s_hv_uvmem.c | 4 +- drivers/gpu/drm/nouveau/nouveau_dmem.c | 19 ++++++-- drivers/gpu/drm/nouveau/nouveau_svm.c | 21 ++++----- drivers/gpu/drm/nouveau/nouveau_svm.h | 13 +++++- .../drm/nouveau/nvkm/subdev/mmu/vmmgp100.c | 13 ++++-- include/linux/migrate.h | 16 +++++-- include/linux/mmu_notifier.h | 7 +++ lib/test_hmm.c | 43 +++++++++---------- mm/migrate.c | 34 +++++---------- tools/testing/selftests/vm/hmm-tests.c | 18 ++++++-- 10 files changed, 112 insertions(+), 76 deletions(-) -- 2.20.1

4 years, 11 months

3
13
0 0

CFP open for testing/fuzzing microconference at LPC

by Kevin Hilman

Hello Linux testing enthusiasts, The CFP is open for the testing/fuzzing microconference[1] at Linux plumbers conference. Please submit your ideas for discussion topics usin the LPC CFP tool: https://www.linuxplumbersconf.org/event/7/abstracts/ Click "Submit new Proposal" at the bottom of the page. There are some suggested topics in the MC announcement[1], but feel free to submit ideas that are not on that list. And yes, LPC will be virtual this year as announced on the LPC blog: https://www.linuxplumbersconf.org/blog/2020/linux-plumbers-conference-2020-… The tools and logistics are being actively worked on, so stay tuned to the LPC blog for all the details. Thanks, Kevin [1] From: https://www.linuxplumbersconf.org/event/7/page/80-accepted-microconferences… The Testing and Fuzzing microconference focuses on advancing the current state of testing and validation of the Linux Kernel, with a focus on encouraging and facilitating collaboration between testing projects. Suggested Topics: Next steps for KernelCI (data formats, dashboards, etc) Structured data feeds for cross-project collaboration Integration with kernel.org tools (e.g. b4) Continued defragmentation of testing infrastructure Better sanitizers: KASAN improvements, KCSAN fallout, future plans. Better hardware testing, hardware sanitizers: how the USB fallout was handled, are there efforts to poke at something besides USB? Improving real-time testing: is there any testing for real time at all? MC leads Sasha Levin <sashal(a)kernel.org> Kevin Hilman <khilman(a)kernel.org>

4 years, 11 months

2
2
0 0

[PATCH 0/6] selftests: arm64: Add floating point selftests

by Mark Brown

This series imports a series of tests for FPSIMD and SVE originally written by Dave Martin to the tree. Since these extensions have some overlap in terms of register usage and must sometimes be tested together they're dropped into a single directory. I've adapted some of the tests to run within the kselftest framework but there are also some stress tests here that are intended to be run as soak tests so aren't suitable for running by default and are mostly just integrated with the build system. There doesn't seem to be a more suitable home for those stress tests and they are very useful for work on these areas of the code so it seems useful to have them somewhere in tree. Mark Brown (6): selftests: arm64: Test case for enumeration of SVE vector lengths selftests: arm64: Add test for the SVE ptrace interface selftests: arm64: Add stress tests for FPSMID and SVE context switching selftests: arm64: Add utility to set SVE vector lengths selftests: arm64: Add wrapper scripts for stress tests selftests: arm64: Add build and documentation for FP tests tools/testing/selftests/arm64/Makefile | 2 +- tools/testing/selftests/arm64/fp/.gitignore | 5 + tools/testing/selftests/arm64/fp/Makefile | 17 + tools/testing/selftests/arm64/fp/README | 100 +++ .../testing/selftests/arm64/fp/asm-offsets.h | 11 + tools/testing/selftests/arm64/fp/assembler.h | 57 ++ .../testing/selftests/arm64/fp/fpsimd-stress | 60 ++ .../testing/selftests/arm64/fp/fpsimd-test.S | 482 +++++++++++++ .../selftests/arm64/fp/sve-probe-vls.c | 58 ++ .../selftests/arm64/fp/sve-ptrace-asm.S | 33 + tools/testing/selftests/arm64/fp/sve-ptrace.c | 336 +++++++++ tools/testing/selftests/arm64/fp/sve-stress | 59 ++ tools/testing/selftests/arm64/fp/sve-test.S | 672 ++++++++++++++++++ tools/testing/selftests/arm64/fp/vlset.c | 155 ++++ 14 files changed, 2046 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/arm64/fp/.gitignore create mode 100644 tools/testing/selftests/arm64/fp/Makefile create mode 100644 tools/testing/selftests/arm64/fp/README create mode 100644 tools/testing/selftests/arm64/fp/asm-offsets.h create mode 100644 tools/testing/selftests/arm64/fp/assembler.h create mode 100755 tools/testing/selftests/arm64/fp/fpsimd-stress create mode 100644 tools/testing/selftests/arm64/fp/fpsimd-test.S create mode 100644 tools/testing/selftests/arm64/fp/sve-probe-vls.c create mode 100644 tools/testing/selftests/arm64/fp/sve-ptrace-asm.S create mode 100644 tools/testing/selftests/arm64/fp/sve-ptrace.c create mode 100755 tools/testing/selftests/arm64/fp/sve-stress create mode 100644 tools/testing/selftests/arm64/fp/sve-test.S create mode 100644 tools/testing/selftests/arm64/fp/vlset.c base-commit: 9ebcfadb0610322ac537dd7aa5d9cbc2b2894c68 -- 2.20.1

4 years, 11 months

1
6
0 0

[PATCH v3 00/19] Introduce partial kernel_read_file() support

by Kees Cook

v3: - add reviews/acks - add "IMA: Add support for file reads without contents" patch - trim CC list, in case that's why vger ignored v2 v2: [missing from lkml archives! (CC list too long?) repeating changes here] - fix issues in firmware test suite - add firmware partial read patches - various bug fixes/cleanups v1: https://lore.kernel.org/lkml/20200717174309.1164575-1-keescook@chromium.org/ Hi, Here's my tree for adding partial read support in kernel_read_file(), which fixes a number of issues along the way. It's got Scott's firmware and IMA patches ported and everything tests cleanly for me (even with CONFIG_IMA_APPRAISE=y). I think the intention is for this to go via Greg's tree since Scott's driver code will depend on it? Thanks, -Kees Kees Cook (15): test_firmware: Test platform fw loading on non-EFI systems selftest/firmware: Add selftest timeout in settings firmware_loader: EFI firmware loader must handle pre-allocated buffer fs/kernel_read_file: Remove FIRMWARE_PREALLOC_BUFFER enum fs/kernel_read_file: Remove FIRMWARE_EFI_EMBEDDED enum fs/kernel_read_file: Split into separate source file fs/kernel_read_file: Remove redundant size argument fs/kernel_read_file: Switch buffer size arg to size_t fs/kernel_read_file: Add file_size output argument LSM: Introduce kernel_post_load_data() hook firmware_loader: Use security_post_load_data() module: Call security_kernel_post_load_data() LSM: Add "contents" flag to kernel_read_file hook fs/kernel_file_read: Add "offset" arg for partial reads firmware: Store opt_flags in fw_priv Scott Branden (4): fs/kernel_read_file: Split into separate include file IMA: Add support for file reads without contents firmware: Add request_partial_firmware_into_buf() test_firmware: Test partial read support drivers/base/firmware_loader/fallback.c | 19 +- drivers/base/firmware_loader/fallback.h | 5 +- .../base/firmware_loader/fallback_platform.c | 16 +- drivers/base/firmware_loader/firmware.h | 7 +- drivers/base/firmware_loader/main.c | 143 ++++++++++--- drivers/firmware/efi/embedded-firmware.c | 21 +- drivers/firmware/efi/embedded-firmware.h | 19 ++ fs/Makefile | 3 +- fs/exec.c | 132 +----------- fs/kernel_read_file.c | 189 ++++++++++++++++++ include/linux/efi_embedded_fw.h | 13 -- include/linux/firmware.h | 12 ++ include/linux/fs.h | 39 ---- include/linux/ima.h | 19 +- include/linux/kernel_read_file.h | 55 +++++ include/linux/lsm_hook_defs.h | 6 +- include/linux/lsm_hooks.h | 12 ++ include/linux/security.h | 19 +- kernel/kexec.c | 2 +- kernel/kexec_file.c | 19 +- kernel/module.c | 24 ++- lib/test_firmware.c | 159 +++++++++++++-- security/integrity/digsig.c | 8 +- security/integrity/ima/ima_fs.c | 10 +- security/integrity/ima/ima_main.c | 70 +++++-- security/integrity/ima/ima_policy.c | 1 + security/loadpin/loadpin.c | 17 +- security/security.c | 26 ++- security/selinux/hooks.c | 8 +- .../selftests/firmware/fw_filesystem.sh | 91 +++++++++ tools/testing/selftests/firmware/settings | 8 + tools/testing/selftests/kselftest/runner.sh | 6 +- 32 files changed, 860 insertions(+), 318 deletions(-) create mode 100644 drivers/firmware/efi/embedded-firmware.h create mode 100644 fs/kernel_read_file.c create mode 100644 include/linux/kernel_read_file.h create mode 100644 tools/testing/selftests/firmware/settings -- 2.25.1

4 years, 11 months

7
50
0 0

[PATCH] kunit: tool: adjust parse regex

by Marcelo Schmitt

kunit config subcommand terminates with error if .config has a configuration assigned with a string, for instance: CONFIG_CC_VERSION_TEXT="gcc (distro package version) ..." This patch adjusts the parse regex to consider such string assignments. Signed-off-by: Marcelo Schmitt <marcelo.schmitt1(a)gmail.com> --- tools/testing/kunit/kunit_config.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/kunit/kunit_config.py b/tools/testing/kunit/kunit_config.py index e75063d603b5..8e55693fe812 100644 --- a/tools/testing/kunit/kunit_config.py +++ b/tools/testing/kunit/kunit_config.py @@ -10,7 +10,7 @@ import collections import re CONFIG_IS_NOT_SET_PATTERN = r'^# CONFIG_(\w+) is not set$' -CONFIG_PATTERN = r'^CONFIG_(\w+)=(\S+)$' +CONFIG_PATTERN = r'^CONFIG_(\w+)=((\S+)|(".*"))$' KconfigEntryBase = collections.namedtuple('KconfigEntry', ['name', 'value']) -- 2.27.0

4 years, 11 months

2
1
0 0

[PATCH v3 0/2] Selftest for cpuidle latency measurement

by Pratik Rajesh Sampat

v2: https://lkml.org/lkml/2020/7/17/369 Changelog v2-->v3 Based on comments from Gautham R. Shenoy adding the following in the selftest, 1. Grepping modules to determine if already loaded 2. Wrapper to enable/disable states 3. Preventing any operation/test on offlined CPUs --- The patch series introduces a mechanism to measure wakeup latency for IPI and timer based interrupts The motivation behind this series is to find significant deviations behind advertised latency and resisdency values To achieve this, we introduce a kernel module and expose its control knobs through the debugfs interface that the selftests can engage with. The kernel module provides the following interfaces within /sys/kernel/debug/latency_test/ for, 1. IPI test: ipi_cpu_dest # Destination CPU for the IPI ipi_cpu_src # Origin of the IPI ipi_latency_ns # Measured latency time in ns 2. Timeout test: timeout_cpu_src # CPU on which the timer to be queued timeout_expected_ns # Timer duration timeout_diff_ns # Difference of actual duration vs expected timer To include the module, check option and include as module kernel hacking -> Cpuidle latency selftests The selftest inserts the module, disables all the idle states and enables them one by one testing the following: 1. Keeping source CPU constant, iterates through all the CPUS measuring IPI latency for baseline (CPU is busy with "cat /dev/random > /dev/null" workload) and the when the CPU is allowed to be at rest 2. Iterating through all the CPUs, sending expected timer durations to be equivalent to the residency of the the deepest idle state enabled and extracting the difference in time between the time of wakeup and the expected timer duration Usage ----- Can be used in conjuction to the rest of the selftests. Default Output location in: tools/testing/cpuidle/cpuidle.log To run this test specifically: $ make -C tools/testing/selftests TARGETS="cpuidle" run_tests There are a few optinal arguments too that the script can take [-h <help>] [-m <location of the module>] [-o <location of the output>] Sample output snippet --------------------- --IPI Latency Test--- --Baseline IPI Latency measurement: CPU Busy-- SRC_CPU DEST_CPU IPI_Latency(ns) ... 0 8 1996 0 9 2125 0 10 1264 0 11 1788 0 12 2045 Baseline Average IPI latency(ns): 1843 ---Enabling state: 5--- SRC_CPU DEST_CPU IPI_Latency(ns) 0 8 621719 0 9 624752 0 10 622218 0 11 623968 0 12 621303 Expected IPI latency(ns): 100000 Observed Average IPI latency(ns): 622792 --Timeout Latency Test-- --Baseline Timeout Latency measurement: CPU Busy-- Wakeup_src Baseline_delay(ns) ... 8 2249 9 2226 10 2211 11 2183 12 2263 Baseline Average timeout diff(ns): 2226 ---Enabling state: 5--- 8 10749 9 10911 10 10912 11 12100 12 73276 Expected timeout(ns): 10000200 Observed Average timeout diff(ns): 23589 Pratik Rajesh Sampat (2): cpuidle: Trace IPI based and timer based wakeup latency from idle states selftest/cpuidle: Add support for cpuidle latency measurement drivers/cpuidle/Makefile | 1 + drivers/cpuidle/test-cpuidle_latency.c | 150 ++++++++++ lib/Kconfig.debug | 10 + tools/testing/selftests/Makefile | 1 + tools/testing/selftests/cpuidle/Makefile | 6 + tools/testing/selftests/cpuidle/cpuidle.sh | 310 +++++++++++++++++++++ tools/testing/selftests/cpuidle/settings | 1 + 7 files changed, 479 insertions(+) create mode 100644 drivers/cpuidle/test-cpuidle_latency.c create mode 100644 tools/testing/selftests/cpuidle/Makefile create mode 100755 tools/testing/selftests/cpuidle/cpuidle.sh create mode 100644 tools/testing/selftests/cpuidle/settings -- 2.25.4

4 years, 11 months

4
6
0 0

[PATCH] selftests: add mincore() tests

by Ricardo Cañuelo

Add a test suite for the mincore() syscall. It tests most of its use cases as well as its interface. Tests implemented: - basic interface test - behavior on anonymous mappings - behavior on anonymous mappings with huge tlb pages - file-backed mapping with a regular file - file-backed mapping with a tmpfs file Signed-off-by: Ricardo Cañuelo <ricardo.canuelo(a)collabora.com> --- Tested in next-20200727 with: make -C tools/testing/selftests and make -C tools/testing/selftests run_tests tools/testing/selftests/Makefile | 1 + tools/testing/selftests/mincore/.gitignore | 2 + tools/testing/selftests/mincore/Makefile | 6 + .../selftests/mincore/mincore_selftest.c | 361 ++++++++++++++++++ 4 files changed, 370 insertions(+) create mode 100644 tools/testing/selftests/mincore/.gitignore create mode 100644 tools/testing/selftests/mincore/Makefile create mode 100644 tools/testing/selftests/mincore/mincore_selftest.c diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index e03bc15ce731..9018f45d631d 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -32,6 +32,7 @@ TARGETS += lkdtm TARGETS += membarrier TARGETS += memfd TARGETS += memory-hotplug +TARGETS += mincore TARGETS += mount TARGETS += mqueue TARGETS += net diff --git a/tools/testing/selftests/mincore/.gitignore b/tools/testing/selftests/mincore/.gitignore new file mode 100644 index 000000000000..15c4dfc2df00 --- /dev/null +++ b/tools/testing/selftests/mincore/.gitignore @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0+ +mincore_selftest diff --git a/tools/testing/selftests/mincore/Makefile b/tools/testing/selftests/mincore/Makefile new file mode 100644 index 000000000000..38c7db1e8926 --- /dev/null +++ b/tools/testing/selftests/mincore/Makefile @@ -0,0 +1,6 @@ +# SPDX-License-Identifier: GPL-2.0+ + +CFLAGS += -Wall + +TEST_GEN_PROGS := mincore_selftest +include ../lib.mk diff --git a/tools/testing/selftests/mincore/mincore_selftest.c b/tools/testing/selftests/mincore/mincore_selftest.c new file mode 100644 index 000000000000..5a1e85ff5d32 --- /dev/null +++ b/tools/testing/selftests/mincore/mincore_selftest.c @@ -0,0 +1,361 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * kselftest suite for mincore(). + * + * Copyright (C) 2020 Collabora, Ltd. + */ + +#define _GNU_SOURCE + +#include <stdio.h> +#include <errno.h> +#include <unistd.h> +#include <stdlib.h> +#include <sys/mman.h> +#include <string.h> +#include <fcntl.h> +#include <string.h> + +#include "../kselftest.h" +#include "../kselftest_harness.h" + +/* Default test file size: 4MB */ +#define MB (1UL << 20) +#define FILE_SIZE (4 * MB) + + +/* + * Tests the user interface. This test triggers most of the documented + * error conditions in mincore(). + */ +TEST(basic_interface) +{ + int retval; + int page_size; + unsigned char vec[1]; + char *addr; + + page_size = sysconf(_SC_PAGESIZE); + + /* Query a 0 byte sized range */ + retval = mincore(0, 0, vec); + EXPECT_EQ(0, retval); + + /* Addresses in the specified range are invalid or unmapped */ + errno = 0; + retval = mincore(NULL, page_size, vec); + EXPECT_EQ(-1, retval); + EXPECT_EQ(ENOMEM, errno); + + errno = 0; + addr = mmap(NULL, page_size, PROT_READ | PROT_WRITE, + MAP_SHARED | MAP_ANONYMOUS, -1, 0); + ASSERT_NE(MAP_FAILED, addr) { + TH_LOG("mmap error: %s", strerror(errno)); + } + + /* <addr> argument is not page-aligned */ + errno = 0; + retval = mincore(addr + 1, page_size, vec); + EXPECT_EQ(-1, retval); + EXPECT_EQ(EINVAL, errno); + + /* <length> argument is too large */ + errno = 0; + retval = mincore(addr, -1, vec); + EXPECT_EQ(-1, retval); + EXPECT_EQ(ENOMEM, errno); + + /* <vec> argument points to an illegal address */ + errno = 0; + retval = mincore(addr, page_size, NULL); + EXPECT_EQ(-1, retval); + EXPECT_EQ(EFAULT, errno); + munmap(addr, page_size); +} + + +/* + * Test mincore() behavior on a private anonymous page mapping. + * Check that the page is not loaded into memory right after the mapping + * but after accessing it (on-demand allocation). + * Then free the page and check that it's not memory-resident. + */ +TEST(check_anonymous_locked_pages) +{ + unsigned char vec[1]; + char *addr; + int retval; + int page_size; + + page_size = sysconf(_SC_PAGESIZE); + + /* Map one page and check it's not memory-resident */ + errno = 0; + addr = mmap(NULL, page_size, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); + ASSERT_NE(MAP_FAILED, addr) { + TH_LOG("mmap error: %s", strerror(errno)); + } + retval = mincore(addr, page_size, vec); + ASSERT_EQ(0, retval); + ASSERT_EQ(0, vec[0]) { + TH_LOG("Page found in memory before use"); + } + + /* Touch the page and check again. It should now be in memory */ + addr[0] = 1; + mlock(addr, page_size); + retval = mincore(addr, page_size, vec); + ASSERT_EQ(0, retval); + ASSERT_EQ(1, vec[0]) { + TH_LOG("Page not found in memory after use"); + } + + /* + * It shouldn't be memory-resident after unlocking it and + * marking it as unneeded. + */ + munlock(addr, page_size); + madvise(addr, page_size, MADV_DONTNEED); + retval = mincore(addr, page_size, vec); + ASSERT_EQ(0, retval); + ASSERT_EQ(0, vec[0]) { + TH_LOG("Page in memory after being zapped"); + } + munmap(addr, page_size); +} + + +/* + * Check mincore() behavior on huge pages. + * This test will be skipped if the mapping fails (ie. if there are no + * huge pages available). + * + * Make sure the system has at least one free huge page, check + * "HugePages_Free" in /proc/meminfo. + * Increment /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages if + * needed. + */ +TEST(check_huge_pages) +{ + unsigned char vec[1]; + char *addr; + int retval; + int page_size; + + page_size = sysconf(_SC_PAGESIZE); + + errno = 0; + addr = mmap(NULL, page_size, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB, + -1, 0); + if (addr == MAP_FAILED) { + if (errno == ENOMEM) + SKIP(return, "No huge pages available."); + else + TH_LOG("mmap error: %s", strerror(errno)); + } + retval = mincore(addr, page_size, vec); + ASSERT_EQ(0, retval); + ASSERT_EQ(0, vec[0]) { + TH_LOG("Page found in memory before use"); + } + + addr[0] = 1; + mlock(addr, page_size); + retval = mincore(addr, page_size, vec); + ASSERT_EQ(0, retval); + ASSERT_EQ(1, vec[0]) { + TH_LOG("Page not found in memory after use"); + } + + munlock(addr, page_size); + munmap(addr, page_size); +} + + +/* + * Test mincore() behavior on a file-backed page. + * No pages should be loaded into memory right after the mapping. Then, + * accessing any address in the mapping range should load the page + * containing the address and a number of subsequent pages (readahead). + * + * The actual readahead settings depend on the test environment, so we + * can't make a lot of assumptions about that. This test covers the most + * general cases. + */ +TEST(check_file_mmap) +{ + unsigned char *vec; + int vec_size; + char *addr; + int retval; + int page_size; + int fd; + int i; + int ra_pages = 0; + + page_size = sysconf(_SC_PAGESIZE); + vec_size = FILE_SIZE / page_size; + if (FILE_SIZE % page_size) + vec_size++; + + vec = calloc(vec_size, sizeof(unsigned char)); + ASSERT_NE(NULL, vec) { + TH_LOG("Can't allocate array"); + } + + errno = 0; + fd = open(".", O_TMPFILE | O_RDWR, 0600); + ASSERT_NE(-1, fd) { + TH_LOG("Can't create temporary file: %s", + strerror(errno)); + } + errno = 0; + retval = fallocate(fd, 0, 0, FILE_SIZE); + ASSERT_EQ(0, retval) { + TH_LOG("Error allocating space for the temporary file: %s", + strerror(errno)); + } + + /* + * Map the whole file, the pages shouldn't be fetched yet. + */ + errno = 0; + addr = mmap(NULL, FILE_SIZE, PROT_READ | PROT_WRITE, + MAP_SHARED, fd, 0); + ASSERT_NE(MAP_FAILED, addr) { + TH_LOG("mmap error: %s", strerror(errno)); + } + retval = mincore(addr, FILE_SIZE, vec); + ASSERT_EQ(0, retval); + for (i = 0; i < vec_size; i++) { + ASSERT_EQ(0, vec[i]) { + TH_LOG("Unexpected page in memory"); + } + } + + /* + * Touch a page in the middle of the mapping. We expect the next + * few pages (the readahead window) to be populated too. + */ + addr[FILE_SIZE / 2] = 1; + retval = mincore(addr, FILE_SIZE, vec); + ASSERT_EQ(0, retval); + ASSERT_EQ(1, vec[FILE_SIZE / 2 / page_size]) { + TH_LOG("Page not found in memory after use"); + } + + i = FILE_SIZE / 2 / page_size + 1; + while (i < vec_size && vec[i]) { + ra_pages++; + i++; + } + EXPECT_GT(ra_pages, 0) { + TH_LOG("No read-ahead pages found in memory"); + } + + EXPECT_LT(i, vec_size) { + TH_LOG("Read-ahead pages reached the end of the file"); + } + /* + * End of the readahead window. The rest of the pages shouldn't + * be in memory. + */ + if (i < vec_size) { + while (i < vec_size && !vec[i]) + i++; + EXPECT_EQ(vec_size, i) { + TH_LOG("Unexpected page in memory beyond readahead window"); + } + } + + munmap(addr, FILE_SIZE); + close(fd); + free(vec); +} + + +/* + * Test mincore() behavior on a page backed by a tmpfs file. This test + * performs the same steps as the previous one. However, we don't expect + * any readahead in this case. + */ +TEST(check_tmpfs_mmap) +{ + unsigned char *vec; + int vec_size; + char *addr; + int retval; + int page_size; + int fd; + int i; + int ra_pages = 0; + + page_size = sysconf(_SC_PAGESIZE); + vec_size = FILE_SIZE / page_size; + if (FILE_SIZE % page_size) + vec_size++; + + vec = calloc(vec_size, sizeof(unsigned char)); + ASSERT_NE(NULL, vec) { + TH_LOG("Can't allocate array"); + } + + errno = 0; + fd = open("/dev/shm", O_TMPFILE | O_RDWR, 0600); + ASSERT_NE(-1, fd) { + TH_LOG("Can't create temporary file: %s", + strerror(errno)); + } + errno = 0; + retval = fallocate(fd, 0, 0, FILE_SIZE); + ASSERT_EQ(0, retval) { + TH_LOG("Error allocating space for the temporary file: %s", + strerror(errno)); + } + + /* + * Map the whole file, the pages shouldn't be fetched yet. + */ + errno = 0; + addr = mmap(NULL, FILE_SIZE, PROT_READ | PROT_WRITE, + MAP_SHARED, fd, 0); + ASSERT_NE(MAP_FAILED, addr) { + TH_LOG("mmap error: %s", strerror(errno)); + } + retval = mincore(addr, FILE_SIZE, vec); + ASSERT_EQ(0, retval); + for (i = 0; i < vec_size; i++) { + ASSERT_EQ(0, vec[i]) { + TH_LOG("Unexpected page in memory"); + } + } + + /* + * Touch a page in the middle of the mapping. We expect only + * that page to be fetched into memory. + */ + addr[FILE_SIZE / 2] = 1; + retval = mincore(addr, FILE_SIZE, vec); + ASSERT_EQ(0, retval); + ASSERT_EQ(1, vec[FILE_SIZE / 2 / page_size]) { + TH_LOG("Page not found in memory after use"); + } + + i = FILE_SIZE / 2 / page_size + 1; + while (i < vec_size && vec[i]) { + ra_pages++; + i++; + } + ASSERT_EQ(ra_pages, 0) { + TH_LOG("Read-ahead pages found in memory"); + } + + munmap(addr, FILE_SIZE); + close(fd); + free(vec); +} + +TEST_HARNESS_MAIN -- 2.18.0

4 years, 11 months

1
0
0 0

kunit compile failed on um

by Cixi Geng

Hi Brendan: When I run kunit test in um , it failed on kernel 5.8-rc* while succeeded in v5.7 with same configuration. is this a bug? Here is my operation: gcc version 7.5.0 (Ubuntu 7.5.0-3ubuntu1~18.04) the kunitconfig: Cixi.Geng:~/git-projects/torvals-linux$ cat .kunitconfig CONFIG_KUNIT=y CONFIG_KUNIT_TEST=y CONFIG_KUNIT_EXAMPLE_TEST=y command: Cixi.Geng:~/git-projects/torvals-linux$ ./tools/testing/kunit/kunit.py run the Error log: [17:51:14] Configuring KUnit Kernel ... [17:51:14] Building KUnit Kernel ... ERROR:root:b"make[1]: \xe8\xbf\x9b\xe5\x85\xa5\xe7\x9b\xae\xe5\xbd\x95\xe2\x80\x9c/home/cixi.geng1/git-projects/torvals-linux/.kunit\xe2\x80\x9d\n/home/cixi.geng1/git-projects/torvals-linux/Makefile:551: recipe for target 'outputmakefile' failed\nmake[1]: \xe7\xa6\xbb\xe5\xbc\x80\xe7\x9b\xae\xe5\xbd\x95\xe2\x80\x9c/home/cixi.geng1/git-projects/torvals-linux/.kunit\xe2\x80\x9d\nMakefile:185: recipe for target '__sub-make' failed\n"

4 years, 11 months

2
2
0 0

[PATCH AUTOSEL 5.4 04/17] selftests: net: ip_defrag: modprobe missing nf_defrag_ipv6 support

by Sasha Levin

From: Paolo Pisati <paolo.pisati(a)canonical.com> [ Upstream commit aba69d49fb49c9166596dd78926514173b7f9ab5 ] Fix ip_defrag.sh when CONFIG_NF_DEFRAG_IPV6=m: $ sudo ./ip_defrag.sh + set -e + mktemp -u XXXXXX + readonly NETNS=ns-rGlXcw + trap cleanup EXIT + setup + ip netns add ns-rGlXcw + ip -netns ns-rGlXcw link set lo up + ip netns exec ns-rGlXcw sysctl -w net.ipv4.ipfrag_high_thresh=9000000 + ip netns exec ns-rGlXcw sysctl -w net.ipv4.ipfrag_low_thresh=7000000 + ip netns exec ns-rGlXcw sysctl -w net.ipv4.ipfrag_time=1 + ip netns exec ns-rGlXcw sysctl -w net.ipv6.ip6frag_high_thresh=9000000 + ip netns exec ns-rGlXcw sysctl -w net.ipv6.ip6frag_low_thresh=7000000 + ip netns exec ns-rGlXcw sysctl -w net.ipv6.ip6frag_time=1 + ip netns exec ns-rGlXcw sysctl -w net.netfilter.nf_conntrack_frag6_high_thresh=9000000 + cleanup + ip netns del ns-rGlXcw $ ls -la /proc/sys/net/netfilter/nf_conntrack_frag6_high_thresh ls: cannot access '/proc/sys/net/netfilter/nf_conntrack_frag6_high_thresh': No such file or directory $ sudo modprobe nf_defrag_ipv6 $ ls -la /proc/sys/net/netfilter/nf_conntrack_frag6_high_thresh -rw-r--r-- 1 root root 0 Jul 14 12:34 /proc/sys/net/netfilter/nf_conntrack_frag6_high_thresh Signed-off-by: Paolo Pisati <paolo.pisati(a)canonical.com> Reviewed-by: Jakub Kicinski <kuba(a)kernel.org> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/net/ip_defrag.sh | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/testing/selftests/net/ip_defrag.sh b/tools/testing/selftests/net/ip_defrag.sh index 15d3489ecd9ce..ceb7ad4dbd945 100755 --- a/tools/testing/selftests/net/ip_defrag.sh +++ b/tools/testing/selftests/net/ip_defrag.sh @@ -6,6 +6,8 @@ set +x set -e +modprobe -q nf_defrag_ipv6 + readonly NETNS="ns-$(mktemp -u XXXXXX)" setup() { -- 2.25.1

4 years, 11 months

1
0
0 0

[PATCH AUTOSEL 5.4 02/17] selftests: fib_nexthop_multiprefix: fix cleanup() netns deletion

by Sasha Levin

From: Paolo Pisati <paolo.pisati(a)canonical.com> [ Upstream commit 651149f60376758a4759f761767965040f9e4464 ] During setup(): ... for ns in h0 r1 h1 h2 h3 do create_ns ${ns} done ... while in cleanup(): ... for n in h1 r1 h2 h3 h4 do ip netns del ${n} 2>/dev/null done ... and after removing the stderr redirection in cleanup(): $ sudo ./fib_nexthop_multiprefix.sh ... TEST: IPv4: host 0 to host 3, mtu 1400 [ OK ] TEST: IPv6: host 0 to host 3, mtu 1400 [ OK ] Cannot remove namespace file "/run/netns/h4": No such file or directory $ echo $? 1 and a non-zero return code, make kselftests fail (even if the test itself is fine): ... not ok 34 selftests: net: fib_nexthop_multiprefix.sh # exit=1 ... Signed-off-by: Paolo Pisati <paolo.pisati(a)canonical.com> Reviewed-by: David Ahern <dsahern(a)gmail.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/net/fib_nexthop_multiprefix.sh | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/net/fib_nexthop_multiprefix.sh b/tools/testing/selftests/net/fib_nexthop_multiprefix.sh index 9dc35a16e4159..51df5e305855a 100755 --- a/tools/testing/selftests/net/fib_nexthop_multiprefix.sh +++ b/tools/testing/selftests/net/fib_nexthop_multiprefix.sh @@ -144,7 +144,7 @@ setup() cleanup() { - for n in h1 r1 h2 h3 h4 + for n in h0 r1 h1 h2 h3 do ip netns del ${n} 2>/dev/null done -- 2.25.1

4 years, 11 months

1
0
0 0

2025

2024

2023

2022

2021

2020

2019

2018

2017

Linux-kselftest-mirror