使用rcu_read_lock的一般流程如下: 1. 调用rcu_read_lock函数来获取读锁。 2.进行读操作,访问共享资源。 3. 调用rcu_read_unlock函数来释放读锁。 示例代码如下所示: ``` //访问共享资源 //... ``` 需要注意的是,在使用rcu_read_lock时,不能进行写操作。如果需要进行写操作,应该使用RCU机制提供的write...
在RCU模式中,使用rcu_read_lock和rcu_read_unlock函数来访问共享数据。当一个线程要读取共享数据时,需要先调用rcu_read_lock函数以获取读取锁,然后进行读取操作,最后再调用rcu_read_unlock释放读取锁。这样可以确保读者之间的互斥性和一致性。 一般情况下,rcu_read_lock和rcu_read_unlock很容易使用,但是需要注意以下...
rcu_read_lock(); if (!who) p = current; else p = find_task_by_vpid(who); if (p) ret = set_task_ioprio(p, ioprio); rcu_read_unlock(); break; case IOPRIO_WHO_PGRP: if (!who) @@ -141,12 +134,7 @@ SYSCALL_DEFINE3(ioprio_set, int, which, int, who, int, ioprio) ...
GPL-incompatible module nvidia.ko uses GPL-only symbol '__rcu_read_lock' ERROR: modpost: GPL-incompatible module nvidia.ko uses GPL-only symbol '__rcu_read_unlock' make[3]: *** [/usr/src/linux-headers-6.1.0-18-common/scripts/Makefile...
Linux 6.7.3 + 545.29.06/550.40.07: ERROR: modpost: GPL-incompatible module nvidia.ko uses GPL-only symbol '__rcu_read_lock' Graphics / Linux Linux j.k 2024 年2 月 7 日 10:47 33 Whatever did you do to fix your issue? Trying to...
rcu->Update(std::make_shared<MyType>(...)); Simple // Afterwards each reader thread can fetch a const pointer to a snapshot of the // instance. This is a lock-free operation. // See benchmark `BM_ReadSharedPtrsThreadLocal` below. auto ref = simple_rcu::ReadPtr(rcu); // `ref...
在下文中一共展示了rcu_read_lock函数的15个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。 示例1: call_sbin_request_key ▲点赞 6▼ staticintcall_sbin_request_key(struct key_construction *cons,constchar*op,void*aux){...
函数名称:_read_lock() - mark the beginning of an RCU read-side critical section* When synchronize_rcu() is invoked on one CPU while other CPUs* are within RCU read-side critical sections, then the* synchronize_rcu() is guaranteed to block until after all the other 函数原型:static __alw...
I am using the ixgbe nic. I found that the rtnl_lock is being used to enable upper device, such as macvlan. I am curious why rcu_read_lock is not used here. I replaced rtnl_lock with rcu_read_lock here. Then I made tests and ...
As a general rule you use rcu_read_lock when you are only reading an RCU protected structure, you use rtnl_lock when you have to protect the system from any other changes while you are updating network configuration. In this case netif_tx_wake_all_queues changes the ...