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[PATCH OLK-6.6 0/8] Introduce qos smt expeller for co-location
by Xia Fukun 27 Dec '23

27 Dec '23

We introduce the qos smt expeller, which lets online tasks to expel offline tasks on the smt sibling cpus, and exclusively occupy CPU resources.In this way we are able to improve QOS of online tasks in co-location. Guan Jing (8): sched: Introduce qos smt expeller for co-location sched: Implement the function of qos smt expeller sched: Add statistics for qos smt expeller sched: Add tracepoint for qos smt expeller config: Enable CONFIG_QOS_SCHED_SMT_EXPELLER sched/fair: Start tracking qos_offline tasks count in cfs_rq sched/fair: Introduce QOS_SMT_EXPELL priority reversion mechanism sched/fair: Add cmdline nosmtexpell arch/arm64/configs/openeuler_defconfig | 1 + arch/x86/configs/openeuler_defconfig | 1 + include/linux/sched.h | 13 + include/trace/events/sched.h | 55 ++++ init/Kconfig | 9 + kernel/sched/debug.c | 5 + kernel/sched/fair.c | 345 +++++++++++++++++++++++-- kernel/sched/sched.h | 27 ++ 8 files changed, 440 insertions(+), 16 deletions(-) -- 2.34.1

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[PATCH OLK-6.6 0/1] iommu: Enable smmu-v3 when 3408iMR/3416iMRraid card exist
by zhangnaichuan 27 Dec '23

27 Dec '23

arm64 cannot support virtualization pass-through feature when using the 3408iMR/3416iMR raid card. For solving the problem, we add two fuctions: 1.we prepare init bypass level2 entry for specific devices when smmu uses 2 level streamid entry. 2.we add smmu.bypassdev cmdline to allow SMMU bypass streams for some specific devices. usage: 3408iMRraid: smmu.bypassdev=0x1000:0x17 3416iMRraid: smmu.bypassdev=0x1000:0x15 drivers/iommu/Kconfig | 9 ++ drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 120 +++++++++++++++++++- 2 files changed, 128 insertions(+), 1 deletion(-) -- 2.33.0

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[PATCH OLK-6.6 0/1] Support priority load balance for qos scheduler
by Song Zhang 27 Dec '23

27 Dec '23

Song Zhang (1): sched: Introduce priority load balance for qos scheduler arch/arm64/configs/openeuler_defconfig | 1 + arch/x86/configs/openeuler_defconfig | 1 + init/Kconfig | 9 +++ kernel/sched/core.c | 3 + kernel/sched/fair.c | 83 +++++++++++++++++++++++++- kernel/sched/sched.h | 3 + 6 files changed, 99 insertions(+), 1 deletion(-) -- 2.33.0

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[PATCH OLK-6.6 0/1] Support priority load balance for qos scheduler
by Song Zhang 27 Dec '23

27 Dec '23

Song Zhang (1): sched: Introduce priority load balance for qos scheduler arch/arm64/configs/openeuler_defconfig | 1 + arch/x86/configs/openeuler_defconfig | 1 + init/Kconfig | 9 +++ kernel/sched/core.c | 3 + kernel/sched/fair.c | 83 +++++++++++++++++++++++++- kernel/sched/sched.h | 3 + 6 files changed, 99 insertions(+), 1 deletion(-) -- 2.33.0

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[PATCH OLK-6.6 0/1] drm: fix free illegal pointer when create drm_property_blob failed
by zhangnaichuan 27 Dec '23

27 Dec '23

we get (Unable to handle kernel NULL pointer dereference at virtual address 000000000000000c) when call drm_property_blob_put(). After analysis, we get the following process: alloc failed: drm_atomic_set_mode_for_crtc() drm_property_create_blob() // failed state->mode_blob = ERR_PTR(-ENOMEM) free illegal pointer: __drm_atomic_helper_crtc_destroy_state() drm_property_blob_put(state->mode_blob) drm_mode_object_put(&blob->base); // here blob is ERR_PTR(-ENOMEM) So do we have to determine if blob is an error code before calling drm_mode_object_put(). Fixes: 6bcacf51d050 (drm: Add reference counting to blob properties) drivers/gpu/drm/drm_property.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) -- 2.33.0

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[PATCH OLK-6.6 V1 00/12] sched: basic infrastructure for scheduler bpf
by Guan Jing 27 Dec '23

27 Dec '23

sched: basic infrastructure for scheduler bpf Guan Jing (12): sched: programmable: Introduce bpf sched sched: programmable: Add a tag for the task sched: programmable: Add a tag for the task group sched: programmable: Add user interface of task group tag sched: programmable: Add user interface of task tag sched: basic infrastructure for scheduler bpf sched: introduce bpf_sched_enable() libbpf: add support for scheduler bpf programs bpftool: recognize scheduler programs sched: Add helper functions to get cpu statistics sched: programmable: Add hook in select_task_rq_fair() sched: programmable: Add hook in can_migrate_task() fs/proc/base.c | 64 +++++++++++++++++ include/linux/bpf_sched.h | 50 ++++++++++++++ include/linux/bpf_types.h | 4 ++ include/linux/sched.h | 38 ++++++++++ include/linux/sched_hook_defs.h | 3 + include/uapi/linux/bpf.h | 9 +++ init/init_task.c | 3 + kernel/bpf/Kconfig | 10 +++ kernel/bpf/btf.c | 1 + kernel/bpf/syscall.c | 27 ++++++++ kernel/bpf/trampoline.c | 1 + kernel/bpf/verifier.c | 11 ++- kernel/sched/bpf_sched.c | 102 +++++++++++++++++++++++++++ kernel/sched/build_utility.c | 4 ++ kernel/sched/core.c | 118 ++++++++++++++++++++++++++++++++ kernel/sched/fair.c | 46 +++++++++++++ kernel/sched/sched.h | 10 +++ scripts/bpf_doc.py | 4 ++ tools/include/uapi/linux/bpf.h | 9 +++ tools/lib/bpf/bpf.c | 1 + tools/lib/bpf/libbpf.c | 23 ++++++- tools/lib/bpf/libbpf.h | 2 + tools/lib/bpf/libbpf.map | 1 + 23 files changed, 539 insertions(+), 2 deletions(-) create mode 100644 include/linux/bpf_sched.h create mode 100644 include/linux/sched_hook_defs.h create mode 100644 kernel/sched/bpf_sched.c -- 2.34.1

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[PATCH v2 OLK-6.6 0/1] x86/kdump: make crash kernel boot faster
by zhangnaichuan 27 Dec '23

27 Dec '23

description: If other cpus offline before handle the crash NMI, the waiting_for_crash_ipi can not be decreased to 0, and current cpu will wait 1 second. So break if all other cpus offline. arch/x86/kernel/reboot.c | 8 ++++++++ 1 file changed, 8 insertions(+) -- 2.33.0

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[PATCH OLK-6.6 0/1] arm64: Add non nmi ipi backtrace support
by Liao Chen 27 Dec '23

27 Dec '23

From: linruizhe <linruizhe(a)huawei.com> Dependencies: CONFIG_DETECT_HUNG_TASK=y CONFIG_WATCHDOG=y Li Zhengyu (1): arm64: Add non nmi ipi backtrace support arch/arm64/kernel/ipi_nmi.c | 18 +++++++++++++++--- 1 file changed, 15 insertions(+), 3 deletions(-) -- 2.25.1

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[PATCH OLK-6.6 0/1] x86/kdump: add log before booting crash kernel
by zhangnaichuan 27 Dec '23

27 Dec '23

description: Just like arm64, print "Bye!" before booting crash kernel. arch/x86/kernel/machine_kexec_64.c | 2 ++ 1 file changed, 2 insertions(+) -- 2.33.0

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[PATCH OLK-6.6 0/1]
by zhangnaichuan 27 Dec '23

27 Dec '23

description: Just like arm64, print "Bye!" before booting crash kernel. arch/x86/kernel/machine_kexec_64.c | 2 ++ 1 file changed, 2 insertions(+) -- 2.33.0

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