内核调度器调度到ksoftirqd内核线程时,会将所有等待处理的 deferred interrupt(也就是 softirq)拿出来,执行对应的处理方法(softirq handler); 以收包软中断为例, IRQ handler 并不执行 NAPI,只是触发它,在里面会执行到 raise NET_RX_SOFTIRQ;真正的执行在 softirq,里面会调用网卡的 poll() 方法收包。IRQ handler ...
+ irq_poll_disable(&irq_ctx->irqpoll); + } + } if (instance->msix_vectors) for (i = 0; i < instance->msix_vectors; i++) { @@ -5722,6 +5752,9 @@ static int megasas_init_fw(struct megasas_instance *instance) megasas_setup_irqs_ioapic(instance)) goto fail_init_adapter; + ...
@@ -7985,13 +7986,14 @@ static void lpfc_init_idle_stat_hb(struct lpfc_hba *phba) idle_stat->prev_wall = wall;if (phba->nvmet_support || phba->cmf_active_mode != LPFC_CFG_OFF) cq->poll_mode = LPFC_QUEUE_WORK; phba->cmf_active_mode != LPFC_CFG_OFF || ...
内核线程时,会将所有等待处理的 deferred interrupt(也就是 softirq)拿出来,执行对应的处理方法(softirq handler); 以收包软中断为例, IRQ handler 并不执行 NAPI,只是触发它,在里面会执行到 raise NET_RX_SOFTIRQ;真正的执行在 softirq,里面会调用网卡的 poll() 方法收包。IRQ handler 中会调用 napi_schedule(...
netpoll_poll_unlock(have); } out: //启用中断 local_irq_enable(); //选择编译部份,忽略 #ifdef CONFIG_NET_DMA /* * There may not be any more sk_buffs coming right now, so push * any pending DMA copies to hardware */ if (!cpus_empty(net_dma.channel_mask)) { ...
What can I do to set IRQ to interrupt for receiving data, so that I do not have to poll(ing) for :MFSR ? while( ( ( LPI2C0->MFSR) >> 16 != n_bytes ) && ( time < timeout ) ) This is my I2C configuration: I2X_MIERu=(DATA=0x7F02,I2C_MIER_SIGNALS=(TDIE_Transmit_Data_...
irq_ctx_init(smp_processor_id()); #endif } x86_init.irqs.pre_vector_init指针指向init_ISA_irqs()函数,主要完成8259A/Local APIC的初始化,apic_intr_init()函数主要完成apic相关的中断的初始化。接着,native_init_IRQ()函数将调用set_intr_gate()函数设置中断门,将interrupt[]数组设置的地址设置到相应的...
void __init start_kernel(void) | setup_arch(&command_line); | setup_processor(); | cpu_init(); /* arch/arm/kernel/setup.c */ ... struct stack { u32 irq[3]; u32 abt[3]; u32 und[3]; } ___cacheline_aligned; static struct stack stacks[NR_CPUS]; ... /* * cpu_init ...
#include<linux/module.h>#include<linux/poll.h>#include<linux/fs.h>#include<linux/errno.h>#include<linux/miscdevice.h>#include<linux/kernel.h>#include<linux/major.h>#include<linux/mutex.h>#include<linux/proc_fs.h>#include<linux/seq_file.h>#include<linux/stat.h>#include<linux/init.h>...
函数enable_irq( )在实现过程中调用了函数__enable_irq( ),根据中断所处的深度和状态的不同,会有不同的执行结果,一般用于改变中断的状态,使中断处于唤醒状态,触发中断处理函数的执行及减少中断所处的深度,即改变字段depth的值。 static int __init enable_disable_irq_init(void) ...