2024 Cpuhp_setup_state_nocalls

Cpuhp_setup_state_nocalls_cpuslocked

Author: qfuo

August undefined, 2024

WebMove KVM's > hotplug callback to ONLINE section so that it can abort onlining a > CPU in > certain cases to avoid potentially breaking VMs running on existing > CPUs. > For example, when KVM fails to enable hardware virtualization on the > hotplugged CPU. > > Place KVM's hotplug state before CPUHP_AP_SCHED_WAIT_EMPTY as it > ensures > when ... Webcpuhp_setup_state_nocalls() invokes get_online_cpus() as well. This is correct, but prevents the conversion of the hotplug locking to a percpu rwsem. Use …

LKML: Greg Kroah-Hartman: [PATCH 5.8 228/633] coresight: …

Web这是cpuhp所包含的一个动作. 你体会到了cpuhp 设计的精妙了吗 ? * / static int cpufreq_online (unsigned int cpu) { / * * 下面给这个policy赋值有两个地方. 这涉及到了 BP 和 AP. * 要弄懂这个policy 你需要先明白 cpufreq_policy 与 cpus的关系. * 一般来说. WebJul 28, 2024 · @@ -158,100 +159,480 @@ at state ``CPUHP_OFFLINE``. This includes: * Once all services are migrated, kernel calls an arch specific routine ``__cpu_disable()`` to perform arch specific cleanup. ... This-might be important to certain drivers which need to perform some kind of setup midtown sweeps cincinnati

[PATCH 0/2] cpufreq: Specify the default governor on command line

Webcpuhp_setup_state_nocalls() invokes get_online_cpus() as well. This is correct, but prevents the conversion of the hotplug locking to a percpu rwsem. Use … Webcpuhp_setup_state_nocalls_cpuslocked(state, name, startup, teardown) For cases where a driver or a subsystem has multiple instances and the same CPU hotplug state callbacks need to be invoked for each instance, the CPU hotplug core provides multi-instance support. The advantage over driver specific instance lists is that the instance … Webcpuhp_store_callbacks() which prevents multiple registrations of callbacks for a given state and due to this race, it returns -EBUSY leading to ETM probe failures like below. midtown sushi nyc

cpufreq 调频 --- linux kernel 实现赏析-程序员宝宝 - 程序员宝宝

CPU hotplug in the Kernel — The Linux Kernel documentation

Webreturn__cpuhp_setup_state(state, name, true, startup, teardown, false); * cpuhp_setup_state_cpuslocked - Setup hotplug state callbacks with calling. * … midtown sweeps coloradoWebcpuhp - Linux-Processes - BoxMatrix. If you like BoxMatrix then please contribute Supportdata, Supportdata2, Firmware and/or Hardware ( get in touch ). My … midtown sushi restaurants nyc

"WebApr 11, 2024 · Issue. We are getting panic on kernel-4.18.0-372.36.1.el8_6.x86_64 while unloading the VxFS kernel module with the following messages: Raw. PANIC: "kernel BUG at kernel/cpu.c:1955!" In VxFS during post module load processing we call the cpuhp_setup_satet (). The cpuhp_setup_state () is returning very large value: Raw. " - Cpuhp_setup_state_nocalls_cpuslocked

Cpuhp_setup_state_nocalls_cpuslocked

[tip:smp/hotplug] cpu/hotplug: Provide …

WebCf. __cpuhp_setup_state_cpuslocked() documentation: Return: On success: Positive state number if @state is CPUHP_AP_ONLINE_DYN; 0 for all other states Indeed, the following: cpuhp_remove_state(CPUHP_AP_ONLINE_DYN); removes the first dynamic states added to the cpuhp state machine. Patches were tested as: - … Web* Author: Daniel Jordan */ #include #include #include #include #include #include #include #include #include #include #include #define PADATA_WORK_ONSTACK 1 /* Work's memory is on stack */ struct padata_work { struct work_struct pw_work; struct list_head pw_list; /* padata_free_works linkage */ void *pw_data; }; static …

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Webcpuhp_setup/remove_state[_nocalls]() call cpus_read_lock() as well, which is possible in the current implementation but prevents converting the hotplug locking to a percpu rwsem. … Web+int __cpuhp_setup_state_cpuslocked(enum cpuhp_state state, const char *name, + bool invoke, + int (*startup)(unsigned int cpu), + int (*teardown)(unsigned int cpu), + bool …

Web*patch V3 00/32] cpu/hotplug: Convert get_online_cpus() to a percpu_rwsem @ 2024-05-24 8:15 Thomas Gleixner 2024-05-24 8:15 ` [patch V3 01/32] cpu/hotplug: Provide cpus_read write_[un]lock() Thomas Gleixner ` (33 more replies) 0 siblings, 34 replies; 95+ messages in thread From: Thomas Gleixner @ 2024-05-24 8:15 UTC (permalink / raw Webcpuhp_setup_state_nocalls() invokes get_online_cpus() as well. This is correct, but prevents the conversion of the hotplug locking to a percpu rwsem. Use …

WebOct 27, 2024 · From: Greg Kroah-Hartman <> Subject [PATCH 5.8 228/633] coresight: etm4x: Fix etm4_count race by moving cpuhp callbacks to init: Date: Tue, 27 Oct 2024 14:49:31 +0100 WebLKML Archive on lore.kernel.org help / color / mirror / Atom feed * [PATCH 0/5] Fix Arm system PMU hotplug issues @ 2024-02-04 17:09 Robin Murphy 2024-02-04 17:09 ` [PATCH 1/5] perf/arm-cci: Fix CPU hotplug race avoidance Robin Murphy ` (5 more replies) 0 siblings, 6 replies; 14+ messages in thread From: Robin Murphy @ 2024-02-04 17:09 …

Web25 enum cpuhp_state {26 cpuhp_invalid = -1, 27 cpuhp_offline = 0, 28 cpuhp_create_threads, 29 cpuhp_perf_prepare, 30 cpuhp_perf_x86_prepare, 31 cpuhp_perf_x86_amd_uncore_prep, 32 cpuhp_perf_power, 33 cpuhp_perf_superh, 34 cpuhp_x86_hpet_dead, 35 cpuhp_x86_apb_dead, 36 cpuhp_x86_mce_dead, 37 …

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