在queue之前,先调用 irq_work_claim() 判断此 work 此时是否可以使用,若别人事先已经对其 flag 标注了 IRQ_WORK_PENDING,则表示此 work 已经被 enqueue 过了,还没来得及处理,是不允许重复对其进行 enqueue 的,直接返回 false。在这个work被处理时,在执行其回调之前,在 irq_work_single() 中清理 IRQ_WORK_PEND...
CSD_TYPE_IRQ_WORK = 0x20, CSD_FLAG_TYPE_MASK = 0xF0, }; /* * structure shares (partial) layout with struct irq_work */ struct __call_single_data { struct llist_node llist; unsigned int flags; smp_call_func_t func; void *info; unsigned int flags; }; /* Use __aligned() to...
static void __irq_work_queue(struct irq_work *entry) { struct irq_work **head, *next; struct irq_work *next;head = &get_cpu_var(irq_work_list); preempt_disable();do { next = *head; next = __this_cpu_read(irq_work_list); ...
An IRQ is a fundamental mechanism in computing that allows devices to interrupt the central processing unit (CPU) when they need attention or action. When a device generates an IRQ, it suspends the CPU's current task to process the interrupt and respond accordingly. ...
Worktile&PingCode市场小伙伴 评论 在Linux系统中,我们可以使用cat /proc/interrupts命令来查看中断分配和中断请求(IRQ)在哪个CPU上。 1. 打开终端,输入以下命令: “` cat /proc/interrupts “` 2. 执行命令后,会显示出系统中所有的中断和它们所分配的CPU信息,例如: ...
workqueue机制是内核启动时会为每个CPU创建几个不同优先级的kworker(worker_thread)内核线程,用以集中处理各种中断的下半部的work。 新技术threaded irq,为每一个中断都创建一个内核线程;多个中断的内核线程可以分配到多个CPU上执行。 所以多个不同设备中断的work都会由同一个kworker线程来处理,在多CPU系统中并发效率不...
printf("Sciclient_rmIrqSet failed, r=%d\n", r); return 1; } I need it to be fixed because I don't want to rebuild bootloaders(workaround in tiboot3) and then verify it before publishing distributions. Our boards has been developed more then 7 ...
Thetoo much work for irq4message is intended as an informational message, not to describe a problem with the serial console port (COM1) itself. It might have a performance problem with the emulated COM1 in the VM with high vCPU counts. The occurrence of this message may be an indication...
IRQ 10, IRQ 11, 禁用 Intel USB 控制器 IRQ 5 IRQ 10, IRQ 11, 禁用 Intel USB 控制器 IRQ 5 IRQ 10, IRQ 11, 禁用 Intel USB 控制器 IRQ 11 IRQ 5, IRQ 10, 禁用 Intel IDE 控制器 启用 禁用 Intel SATA 控制器 IRQ 5 IRQ 10, IRQ 11, 禁用 Intel 音频设备 IRQ 5 IRQ 10, ...
"serial8250: too much work for irq4" is observed in /var/log/messages on kvm guest. Environment KVM Host : Red Hat Enterprise Linux 6.5 (2.6.32-431.el6.x86_64) KVM Guest : Red Hat Enterprise Linux 6.5 (2.6.32-431.el6.x86_64) ...