voidsmp_message_recv(intmsg){switch(msg) {casePPC_MSG_CALL_FUNCTION:generic_smp_call_function_interrupt();break;casePPC_MSG_RESCHEDULE:/* we notice need_resched on exit */break;casePPC_MSG_CALL_FUNC_SINGLE: generic_smp_call_function_single_interrupt();break;casePPC_MSG_DEBUGGER_BREAK:if(cr...
intsmp_call_function_single(intcpu,void(*func)(void*info),void*info,intretry,intwait);//参数说明cpu 参数是要执行函数的 CPU 核心编号。 func 参数是指向要执行的函数的指针。 info 参数是一个可选的参数指针,可以传递给被调用的函数。 retry 参数指定了在发生错误时重试的次数。如果为0,则不会重试。
static DEFINE_PER_CPU_SHARED_ALIGNED(struct llist_head, call_single_queue); static void flush_smp_call_function_queue(bool warn_cpu_offline); int smpcfd_prepare_cpu(unsigned int cpu) { struct call_function_data *cfd = &per_cpu(cfd_data, cpu); ...
send_call_function_single_ipi(cpu); __smp_call_single_queue(cpu, &csd->llist);return 0; } @@ -194,16 +194,10 @@ static int generic_exec_single(int cpu, call_single_data_t *csd, void generic_smp_call_function_single_interrupt(void) ...
smp_call_func_tfunc,void*info,intwait); voidkick_all_cpus_sync(void); voidwake_up_all_idle_cpus(void); /* * Generic and arch helpers */ void__initcall_function_init(void); voidgeneric_smp_call_function_single_interrupt(void);
在CPU 中发生软锁定,一个任务调用了 smp_call_function_many() 并等待目标 CPU 处理 IPI。 [26314590.124689] watchdog: BUG: soft lockup - CPU#63 stuck for 22s! [kworker/63:1:1026052] [26314590.132847] Modules linked in: nf_tables nfnetlink sctp sit tunnel4 ip_tunnel 8021q garp mrp stp llc...
(void); /* * Generic and arch helpers */ void __init call_function_init(void); void generic_smp_call_function_single_interrupt(void); #define generic_smp_call_function_interrupt \ generic_smp_call_function_single_interrupt /* * Mark the boot cpu "online" so that it can call console ...
Theprocnto-smpmanager will also function on a single non-SMP system. With the cost of building a dual-processor Pentium motherboard very nearly the same as a single-processor motherboard, it's possible to deliver cost-effective solutions that can be scaled in the field by the simple addition...
SMP_CALL_FUNCTION: 将特定的函数在目标 CPU 上运行 内核回调接口: staticinlinevoidarch_send_call_function_single_ipi(int cpu) { externstructplat_smp_ops *mp_ops;/* private */ mp_ops->send_ipi_mask(&cpumask_of_cpu(cpu), SMP_CALL_FUNCTION); ...
假设 CPU0 需要给 CPU1 发送一个 action(actionI 的类型:SMP_CALL_FUNCTION,SMP_RESCHEDULE_YOURSELF 等) 时,只需要 CPU0 向 CPU1 的 mailbox 中写于 action 的 id(相当于信),此时 CPU1 将产生一个 IPI 中断...