我们通过call_rcu函数向data指向的结构体中注册一个回调函数my_free,该函数将在data指向的结构体被释放时调用。在主线程中,我们使用RCU技术更新了共享数据。 需要注意的是,回调函数my_free将负责释放数据,而在主线程中,我们不再需要显式地释放data指向的结构体。此外,我们依然通过rcu_dereference函数获取共享数据的指...
void my_rcu_free(struct rcu_head *head) { struct my_rcu_struct *mrs = contAIner_of(head, struct my_rcu_struct, rcu); free(mrs); } 四、使用call_rcu进行回调 call_rcu函数的使用是进行RCU回收的核心步骤。当更新了被RCU保护的数据后,可以调用call_rcu来安排回调的执行,这可以确保任何还在读旧版本...
我们通过call_rcu函数向data指向的结构体中注册一个回调函数my_free,该函数将在data指向的结构体被释放时调用。在主线程中,我们使用RCU技术更新了共享数据。 需要注意的是,回调函数my_free将负责释放数据,而在主线程中,我们不再需要显式地释放data指向的结构体。此外,我们依然通过rcu_dereference函数获取共享数据的指...
我们通过call_rcu函数向data指向的结构体中注册一个回调函数my_free，该函数将在data指向的结构体被释放...
In order to scale Read-Copy Update (RCU) callback offloading from no-callbacks (No-CBs) CPUs, a set of RCU callback offload kernel threads (rcuo kthreads) may be spawned and each may be assigned to one of the No-CBs CPUs to invoke RCU callbacks generated by workloads running on the...
call_rcu()函数解析 113 DECLARE_PER_CPU(struct rcu_data, rcu_data); 114 DECLARE_PER_CPU(struct rcu_data, rcu_bh_data); 该结构在SMP定义每个CPU私有数据, #define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name...
http://paulmck.livejournal.com/7314.html RCU的作者,paul在他的blog中有提到这个问题,也明确提到需要在module exit的地方使用rcu_barrier来等待保证call_rcu的回调函数callback能够执行完成,然后再正式卸载模块,方式快速
Since SLOB was removed, it is not necessary to use call_rcu when the callback only performs kmem_cache_free. Use kfree_rcu() directly. The changes were done using the following Coccinelle semantic patch. This semantic patch is designed to ignore cases where the callback function is used in...
> call_rcu_data structure. It then releases call_rcu_mutex and > enters a mystifying loop that does futex stuff. > > o The first thread finishes executing call_rcu_data_free(), > which acquires call_rcu_mutex just long enough to remove the ...
call_rcu(&e->f.g,cb@p) ) @r1@ type T,T1; identifier x,r.cb; @@ cb(...) { ( kmem_cache_free(...); | T x = ...; kmem_cache_free(...,(T1)x); | T x; x = ...; kmem_cache_free(...,(T1)x); ) }