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

[PATCH bpf-next] selftests/bpf: Fix issues in parse_num_list()

by Yuntao Wang

There are some issues in parse_num_list(): 1. The end variable is assigned twice when parsing_end is true. 2. The function does not check that parsing_end should finally be false. Clean up parse_num_list() and fix these issues. Signed-off-by: Yuntao Wang <ytcoode(a)gmail.com> --- tools/testing/selftests/bpf/testing_helpers.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) diff --git a/tools/testing/selftests/bpf/testing_helpers.c b/tools/testing/selftests/bpf/testing_helpers.c index 795b6798ccee..82f0e2d99c23 100644 --- a/tools/testing/selftests/bpf/testing_helpers.c +++ b/tools/testing/selftests/bpf/testing_helpers.c @@ -20,16 +20,16 @@ int parse_num_list(const char *s, bool **num_set, int *num_set_len) if (errno) return -errno; - if (parsing_end) - end = num; - else + if (!parsing_end) { start = num; + if (*next == '-') { + s = next + 1; + parsing_end = true; + continue; + } + } - if (!parsing_end && *next == '-') { - s = next + 1; - parsing_end = true; - continue; - } else if (*next == ',') { + if (*next == ',') { parsing_end = false; s = next + 1; end = num; @@ -60,7 +60,7 @@ int parse_num_list(const char *s, bool **num_set, int *num_set_len) set[i] = true; } - if (!set) + if (!set || parsing_end) return -EINVAL; *num_set = set; -- 2.35.1

2 years, 10 months

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[PATCH bpf v4] bpf: Support dual-stack sockets in bpf_tcp_check_syncookie

by Maxim Mikityanskiy

bpf_tcp_gen_syncookie looks at the IP version in the IP header and validates the address family of the socket. It supports IPv4 packets in AF_INET6 dual-stack sockets. On the other hand, bpf_tcp_check_syncookie looks only at the address family of the socket, ignoring the real IP version in headers, and validates only the packet size. This implementation has some drawbacks: 1. Packets are not validated properly, allowing a BPF program to trick bpf_tcp_check_syncookie into handling an IPv6 packet on an IPv4 socket. 2. Dual-stack sockets fail the checks on IPv4 packets. IPv4 clients end up receiving a SYNACK with the cookie, but the following ACK gets dropped. This patch fixes these issues by changing the checks in bpf_tcp_check_syncookie to match the ones in bpf_tcp_gen_syncookie. IP version from the header is taken into account, and it is validated properly with address family. Fixes: 399040847084 ("bpf: add helper to check for a valid SYN cookie") Signed-off-by: Maxim Mikityanskiy <maximmi(a)nvidia.com> Reviewed-by: Tariq Toukan <tariqt(a)nvidia.com> --- net/core/filter.c | 17 +++- .../bpf/test_tcp_check_syncookie_user.c | 78 ++++++++++++++----- 2 files changed, 72 insertions(+), 23 deletions(-) v2 changes: moved from bpf-next to bpf. v3 changes: added a selftest. v4 changes: none, CCed Jakub and Arthur from Cloudflare. diff --git a/net/core/filter.c b/net/core/filter.c index a7044e98765e..64470a727ef7 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -7016,24 +7016,33 @@ BPF_CALL_5(bpf_tcp_check_syncookie, struct sock *, sk, void *, iph, u32, iph_len if (!th->ack || th->rst || th->syn) return -ENOENT; + if (unlikely(iph_len < sizeof(struct iphdr))) + return -EINVAL; + if (tcp_synq_no_recent_overflow(sk)) return -ENOENT; cookie = ntohl(th->ack_seq) - 1; - switch (sk->sk_family) { - case AF_INET: - if (unlikely(iph_len < sizeof(struct iphdr))) + /* Both struct iphdr and struct ipv6hdr have the version field at the + * same offset so we can cast to the shorter header (struct iphdr). + */ + switch (((struct iphdr *)iph)->version) { + case 4: + if (sk->sk_family == AF_INET6 && ipv6_only_sock(sk)) return -EINVAL; ret = __cookie_v4_check((struct iphdr *)iph, th, cookie); break; #if IS_BUILTIN(CONFIG_IPV6) - case AF_INET6: + case 6: if (unlikely(iph_len < sizeof(struct ipv6hdr))) return -EINVAL; + if (sk->sk_family != AF_INET6) + return -EINVAL; + ret = __cookie_v6_check((struct ipv6hdr *)iph, th, cookie); break; #endif /* CONFIG_IPV6 */ diff --git a/tools/testing/selftests/bpf/test_tcp_check_syncookie_user.c b/tools/testing/selftests/bpf/test_tcp_check_syncookie_user.c index b9e991d43155..e7775d3bbe08 100644 --- a/tools/testing/selftests/bpf/test_tcp_check_syncookie_user.c +++ b/tools/testing/selftests/bpf/test_tcp_check_syncookie_user.c @@ -18,8 +18,9 @@ #include "bpf_rlimit.h" #include "cgroup_helpers.h" -static int start_server(const struct sockaddr *addr, socklen_t len) +static int start_server(const struct sockaddr *addr, socklen_t len, bool dual) { + int mode = !dual; int fd; fd = socket(addr->sa_family, SOCK_STREAM, 0); @@ -28,6 +29,14 @@ static int start_server(const struct sockaddr *addr, socklen_t len) goto out; } + if (addr->sa_family == AF_INET6) { + if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, (char *)&mode, + sizeof(mode)) == -1) { + log_err("Failed to set the dual-stack mode"); + goto close_out; + } + } + if (bind(fd, addr, len) == -1) { log_err("Failed to bind server socket"); goto close_out; @@ -47,24 +56,17 @@ static int start_server(const struct sockaddr *addr, socklen_t len) return fd; } -static int connect_to_server(int server_fd) +static int connect_to_server(const struct sockaddr *addr, socklen_t len) { - struct sockaddr_storage addr; - socklen_t len = sizeof(addr); int fd = -1; - if (getsockname(server_fd, (struct sockaddr *)&addr, &len)) { - log_err("Failed to get server addr"); - goto out; - } - - fd = socket(addr.ss_family, SOCK_STREAM, 0); + fd = socket(addr->sa_family, SOCK_STREAM, 0); if (fd == -1) { log_err("Failed to create client socket"); goto out; } - if (connect(fd, (const struct sockaddr *)&addr, len) == -1) { + if (connect(fd, (const struct sockaddr *)addr, len) == -1) { log_err("Fail to connect to server"); goto close_out; } @@ -116,7 +118,8 @@ static int get_map_fd_by_prog_id(int prog_id, bool *xdp) return map_fd; } -static int run_test(int server_fd, int results_fd, bool xdp) +static int run_test(int server_fd, int results_fd, bool xdp, + const struct sockaddr *addr, socklen_t len) { int client = -1, srv_client = -1; int ret = 0; @@ -142,7 +145,7 @@ static int run_test(int server_fd, int results_fd, bool xdp) goto err; } - client = connect_to_server(server_fd); + client = connect_to_server(addr, len); if (client == -1) goto err; @@ -199,12 +202,30 @@ static int run_test(int server_fd, int results_fd, bool xdp) return ret; } +static bool get_port(int server_fd, in_port_t *port) +{ + struct sockaddr_in addr; + socklen_t len = sizeof(addr); + + if (getsockname(server_fd, (struct sockaddr *)&addr, &len)) { + log_err("Failed to get server addr"); + return false; + } + + /* sin_port and sin6_port are located at the same offset. */ + *port = addr.sin_port; + return true; +} + int main(int argc, char **argv) { struct sockaddr_in addr4; struct sockaddr_in6 addr6; + struct sockaddr_in addr4dual; + struct sockaddr_in6 addr6dual; int server = -1; int server_v6 = -1; + int server_dual = -1; int results = -1; int err = 0; bool xdp; @@ -224,25 +245,43 @@ int main(int argc, char **argv) addr4.sin_family = AF_INET; addr4.sin_addr.s_addr = htonl(INADDR_LOOPBACK); addr4.sin_port = 0; + memcpy(&addr4dual, &addr4, sizeof(addr4dual)); memset(&addr6, 0, sizeof(addr6)); addr6.sin6_family = AF_INET6; addr6.sin6_addr = in6addr_loopback; addr6.sin6_port = 0; - server = start_server((const struct sockaddr *)&addr4, sizeof(addr4)); - if (server == -1) + memset(&addr6dual, 0, sizeof(addr6dual)); + addr6dual.sin6_family = AF_INET6; + addr6dual.sin6_addr = in6addr_any; + addr6dual.sin6_port = 0; + + server = start_server((const struct sockaddr *)&addr4, sizeof(addr4), + false); + if (server == -1 || !get_port(server, &addr4.sin_port)) goto err; server_v6 = start_server((const struct sockaddr *)&addr6, - sizeof(addr6)); - if (server_v6 == -1) + sizeof(addr6), false); + if (server_v6 == -1 || !get_port(server_v6, &addr6.sin6_port)) + goto err; + + server_dual = start_server((const struct sockaddr *)&addr6dual, + sizeof(addr6dual), true); + if (server_dual == -1 || !get_port(server_dual, &addr4dual.sin_port)) + goto err; + + if (run_test(server, results, xdp, + (const struct sockaddr *)&addr4, sizeof(addr4))) goto err; - if (run_test(server, results, xdp)) + if (run_test(server_v6, results, xdp, + (const struct sockaddr *)&addr6, sizeof(addr6))) goto err; - if (run_test(server_v6, results, xdp)) + if (run_test(server_dual, results, xdp, + (const struct sockaddr *)&addr4dual, sizeof(addr4dual))) goto err; printf("ok\n"); @@ -252,6 +291,7 @@ int main(int argc, char **argv) out: close(server); close(server_v6); + close(server_dual); close(results); return err; } -- 2.30.2

2 years, 10 months

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[RFC v4 0/8] Proposal for a GPU cgroup controller

by T.J. Mercier

This patch series revisits the proposal for a GPU cgroup controller to track and limit memory allocations by various device/allocator subsystems. The patch series also contains a simple prototype to illustrate how Android intends to implement DMA-BUF allocator attribution using the GPU cgroup controller. The prototype does not include resource limit enforcements. Changelog: v4: Skip test if not run as root per Shuah Khan Add better test logging for abnormal child termination per Shuah Khan Adjust ordering of charge/uncharge during transfer to avoid potentially hitting cgroup limit per Michal Koutný Adjust gpucg_try_charge critical section for charge transfer functionality Fix uninitialized return code error for dmabuf_try_charge error case v3: Remove Upstreaming Plan from gpu-cgroup.rst per John Stultz Use more common dual author commit message format per John Stultz Remove android from binder changes title per Todd Kjos Add a kselftest for this new behavior per Greg Kroah-Hartman Include details on behavior for all combinations of kernel/userspace versions in changelog (thanks Suren Baghdasaryan) per Greg Kroah-Hartman. Fix pid and uid types in binder UAPI header v2: See the previous revision of this change submitted by Hridya Valsaraju at: https://lore.kernel.org/all/20220115010622.3185921-1-hridya@google.com/ Move dma-buf cgroup charge transfer from a dma_buf_op defined by every heap to a single dma-buf function for all heaps per Daniel Vetter and Christian König. Pointers to struct gpucg and struct gpucg_device tracking the current associations were added to the dma_buf struct to achieve this. Fix incorrect Kconfig help section indentation per Randy Dunlap. History of the GPU cgroup controller ==================================== The GPU/DRM cgroup controller came into being when a consensus[1] was reached that the resources it tracked were unsuitable to be integrated into memcg. Originally, the proposed controller was specific to the DRM subsystem and was intended to track GEM buffers and GPU-specific resources[2]. In order to help establish a unified memory accounting model for all GPU and all related subsystems, Daniel Vetter put forth a suggestion to move it out of the DRM subsystem so that it can be used by other DMA-BUF exporters as well[3]. This RFC proposes an interface that does the same. [1]: https://patchwork.kernel.org/project/dri-devel/cover/20190501140438.9506-1-… [2]: https://lore.kernel.org/amd-gfx/20210126214626.16260-1-brian.welty@intel.co… [3]: https://lore.kernel.org/amd-gfx/YCVOl8%2F87bqRSQei@phenom.ffwll.local/ Hridya Valsaraju (5): gpu: rfc: Proposal for a GPU cgroup controller cgroup: gpu: Add a cgroup controller for allocator attribution of GPU memory dmabuf: heaps: export system_heap buffers with GPU cgroup charging dmabuf: Add gpu cgroup charge transfer function binder: Add a buffer flag to relinquish ownership of fds T.J. Mercier (3): dmabuf: Use the GPU cgroup charge/uncharge APIs binder: use __kernel_pid_t and __kernel_uid_t for userspace selftests: Add binder cgroup gpu memory transfer test Documentation/gpu/rfc/gpu-cgroup.rst | 183 +++++++ Documentation/gpu/rfc/index.rst | 4 + drivers/android/binder.c | 26 + drivers/dma-buf/dma-buf.c | 107 ++++ drivers/dma-buf/dma-heap.c | 27 + drivers/dma-buf/heaps/system_heap.c | 3 + include/linux/cgroup_gpu.h | 139 +++++ include/linux/cgroup_subsys.h | 4 + include/linux/dma-buf.h | 22 +- include/linux/dma-heap.h | 11 + include/uapi/linux/android/binder.h | 5 +- init/Kconfig | 7 + kernel/cgroup/Makefile | 1 + kernel/cgroup/gpu.c | 362 +++++++++++++ .../selftests/drivers/android/binder/Makefile | 8 + .../drivers/android/binder/binder_util.c | 254 +++++++++ .../drivers/android/binder/binder_util.h | 32 ++ .../selftests/drivers/android/binder/config | 4 + .../binder/test_dmabuf_cgroup_transfer.c | 484 ++++++++++++++++++ 19 files changed, 1679 insertions(+), 4 deletions(-) create mode 100644 Documentation/gpu/rfc/gpu-cgroup.rst create mode 100644 include/linux/cgroup_gpu.h create mode 100644 kernel/cgroup/gpu.c create mode 100644 tools/testing/selftests/drivers/android/binder/Makefile create mode 100644 tools/testing/selftests/drivers/android/binder/binder_util.c create mode 100644 tools/testing/selftests/drivers/android/binder/binder_util.h create mode 100644 tools/testing/selftests/drivers/android/binder/config create mode 100644 tools/testing/selftests/drivers/android/binder/test_dmabuf_cgroup_transfer.c -- 2.35.1.1021.g381101b075-goog

2 years, 10 months

4
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kselftest/next kselftest-lkdtm: 1 runs, 1 regressions (v5.18-rc1)

by kernelci.org bot

kselftest/next kselftest-lkdtm: 1 runs, 1 regressions (v5.18-rc1) 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/v5.18-rc1/plan/k… Test: kselftest-lkdtm Tree: kselftest Branch: next Describe: v5.18-rc1 URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: 3123109284176b1532874591f7c81f3837bbdc17 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/624c5e5953d4870b59ae0690 Results: 56 PASS, 8 FAIL, 26 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/v5.18-rc1/arm64/defconfig+ksel… HTML log: https://storage.kernelci.org//kselftest/next/v5.18-rc1/arm64/defconfig+ksel… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bullseye-kselftest/2022040… * kselftest-lkdtm.lkdtm_READ_AFTER_FREE_sh: https://kernelci.org/test/case/id/624c5e5953d4870b59ae06cc new failure (last pass: v5.17-rc5-22-gf6d344cd5fa6)

2 years, 10 months

1
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kselftest/next kselftest-rtc: 2 runs, 1 regressions (v5.18-rc1)

by kernelci.org bot

kselftest/next kselftest-rtc: 2 runs, 1 regressions (v5.18-rc1) 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/v5.18-rc1/plan/k… Test: kselftest-rtc Tree: kselftest Branch: next Describe: v5.18-rc1 URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: 3123109284176b1532874591f7c81f3837bbdc17 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/624c5e204798164637ae06a7 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/v5.18-rc1/arm64/defconfig+ksel… HTML log: https://storage.kernelci.org//kselftest/next/v5.18-rc1/arm64/defconfig+ksel… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bullseye-kselftest/2022040… * kselftest-rtc.login: https://kernelci.org/test/case/id/624c5e204798164637ae06a8 new failure (last pass: v5.17-rc5-22-gf6d344cd5fa6)

2 years, 10 months

1
0
0 0

kselftest/next kselftest-seccomp: 1 runs, 4 regressions (v5.18-rc1)

by kernelci.org bot

kselftest/next kselftest-seccomp: 1 runs, 4 regressions (v5.18-rc1) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions ----------------+-------+---------------+----------+------------------------------+------------ mt8173-elm-hana | arm64 | lab-collabora | gcc-10 | defconfig+kse...4-chromebook | 4 Details: https://kernelci.org/test/job/kselftest/branch/next/kernel/v5.18-rc1/plan/k… Test: kselftest-seccomp Tree: kselftest Branch: next Describe: v5.18-rc1 URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: 3123109284176b1532874591f7c81f3837bbdc17 Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions ----------------+-------+---------------+----------+------------------------------+------------ mt8173-elm-hana | arm64 | lab-collabora | gcc-10 | defconfig+kse...4-chromebook | 4 Details: https://kernelci.org/test/plan/id/624c5f0c2105dfb7c1ae067e Results: 87 PASS, 4 FAIL, 8 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/v5.18-rc1/arm64/defconfig+ksel… HTML log: https://storage.kernelci.org//kselftest/next/v5.18-rc1/arm64/defconfig+ksel… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bullseye-kselftest/2022040… * kselftest-seccomp.seccomp_seccomp_bpf: https://kernelci.org/test/case/id/624c5f0c2105dfb7c1ae0681 failing since 40 days (last pass: v5.17-rc1-2-g6d468898d774, first fail: v5.17-rc5-16-g1900be289b59) * kselftest-seccomp.seccomp_seccomp_bpf_TSYNC_two_siblings_with_one_divergence_no_tid_in_err: https://kernelci.org/test/case/id/624c5f0c2105dfb7c1ae0682 failing since 40 days (last pass: v5.17-rc1-2-g6d468898d774, first fail: v5.17-rc5-16-g1900be289b59) * kselftest-seccomp.seccomp_seccomp_bpf_TSYNC_two_siblings_with_one_divergence: https://kernelci.org/test/case/id/624c5f0c2105dfb7c1ae0683 failing since 40 days (last pass: v5.17-rc1-2-g6d468898d774, first fail: v5.17-rc5-16-g1900be289b59) * kselftest-seccomp.seccomp_seccomp_bpf_TSYNC_siblings_fail_prctl: https://kernelci.org/test/case/id/624c5f0c2105dfb7c1ae0687 failing since 40 days (last pass: v5.17-rc1-2-g6d468898d774, first fail: v5.17-rc5-16-g1900be289b59)

2 years, 10 months

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kselftest/fixes build: 8 builds: 0 failed, 8 passed (v5.18-rc1-7-g79ee8aa31d51)

by kernelci.org bot

kselftest/fixes build: 8 builds: 0 failed, 8 passed (v5.18-rc1-7-g79ee8aa31d51) Full Build Summary: https://kernelci.org/build/kselftest/branch/fixes/kernel/v5.18-rc1-7-g79ee8… Tree: kselftest Branch: fixes Git Describe: v5.18-rc1-7-g79ee8aa31d51 Git Commit: 79ee8aa31d518c1fd5f3b1b1ac39dd1fb4dc7039 Git URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git Built: 4 unique architectures ================================================================================ Detailed per-defconfig build reports: -------------------------------------------------------------------------------- defconfig+kselftest (arm64, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest (arm64, clang-14) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, clang-14) — 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-14) — PASS, 0 errors, 0 warnings, 0 section mismatches --- For more info write to <info(a)kernelci.org>

2 years, 10 months

1
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kselftest/next build: 7 builds: 0 failed, 7 passed (v5.18-rc1)

by kernelci.org bot

kselftest/next build: 7 builds: 0 failed, 7 passed (v5.18-rc1) Full Build Summary: https://kernelci.org/build/kselftest/branch/next/kernel/v5.18-rc1/ Tree: kselftest Branch: next Git Describe: v5.18-rc1 Git Commit: 3123109284176b1532874591f7c81f3837bbdc17 Git URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git Built: 4 unique architectures ================================================================================ Detailed per-defconfig build reports: -------------------------------------------------------------------------------- defconfig+kselftest (arm64, gcc-10) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest (arm64, clang-14) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- 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-14) — PASS, 0 errors, 0 warnings, 0 section mismatches --- For more info write to <info(a)kernelci.org>

2 years, 10 months

1
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Re: [RFC v1 01/10] roadtest: import libvhost-user from QEMU

by Johannes Berg

On Fri, 2022-03-11 at 17:24 +0100, Vincent Whitchurch wrote: > Import the libvhost-user from QEMU for use in the implementation of the > virtio devices in the roadtest backend. > So hm, I wonder if this is the sensible thing to do? Not that I mind importing qemu code, but: 1) the implementation is rather complex in some places, and has support for a LOT of virtio/vhost-user features that are really not needed in these cases, for performance etc. It's also close to 4k LOC. 2) the implementation doesn't support time-travel mode which might come in handy We have another implementation that might be simpler: https://github.com/linux-test-project/usfstl/blob/main/src/vhost.c but it probably has dependencies on other things in this library, but vhost.c itself is only ~1k LOC. (But I need to update it, I'm sure we have some unpublished bugfixes etc. in this code) johannes

2 years, 10 months

2
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Prezentacja

by Marek Onufrowicz

Dzień dobry! Czy mógłbym przedstawić rozwiązanie, które umożliwia monitoring każdego auta w czasie rzeczywistym w tym jego pozycję, zużycie paliwa i przebieg? Dodatkowo nasze narzędzie minimalizuje koszty utrzymania samochodów, skraca czas przejazdów, a także tworzenie planu tras czy dostaw. Z naszej wiedzy i doświadczenia korzysta już ponad 49 tys. Klientów. Monitorujemy 809 000 pojazdów na całym świecie, co jest naszą najlepszą wizytówką. Bardzo proszę o e-maila zwrotnego, jeśli moglibyśmy wspólnie omówić potencjał wykorzystania takiego rozwiązania w Państwa firmie. Pozdrawiam, Marek Onufrowicz

2 years, 10 months

1
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