struct rcu_head rcuhead; }f_u; 其中的struct list_head定义在 linux/include/linux/list.h中,原型为: struct list_head { struct list_head *next, *prev; }; 用于通用文件对象链表的指针。 struct rcu_head定义在linux/include/linux/rcupdate.h中,其原型为: /** * struct rcu_head - callback str...
rcu_head主要被用作RCU锁 struct rcu_head rcu_head; 第二个Union struct page的第二个union大小为4个字节,主要成员包括如下: union { /* This union is 4 bytes in size. */ /* * If the page can be mapped to userspace, encodes the number * of times this page is referenced by a page tab...
struct hlist_bl_node d_in_lookup_hash; struct rcu_head d_rcu; } d_u; } __randomize_layout; l d_flags:目录项的标志位,用于标识目录项的状态和属性。 l d_seq:用于实现读-复制更新(RCU)机制的序列计数器,用于保护目录项的访问。 l d_hash:用于在哈希表中进行目录项的快速查找。除根dentry以外,...
struct rcu_head rcuhead; }f_u; 其中的struct list_head定义在 linux/include/linux/list.h中,原型为: struct list_head { struct list_head *next, *prev; }; 用于通用文件对象链表的指针。 struct rcu_head定义在linux/include/linux/rcupdate.h中,其原型为: /** * struct rcu_head - callback str...
int rcu_read_lock_nesting; char rcu_read_unlock_special; struct list_head rcu_node_entry; #endif /* #ifdef CONFIG_PREEMPT_RCU */ #ifdef CONFIG_TREE_PREEMPT_RCU struct rcu_node *rcu_blocked_node; #endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */ ...
int rcu_read_lock_nesting; char rcu_read_unlock_special; struct list_head rcu_node_entry; #endif /* #ifdef CONFIG_PREEMPT_RCU */ #ifdef CONFIG_TREE_PREEMPT_RCU struct rcu_node *rcu_blocked_node; #endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */ ...
/** @rcu_head: You can use this to free a page by RCU. */ structrcu_headrcu_head; }; union{/* This union is 4 bytes in size. */ /* * If the page can be mapped to userspace, encodes the number * of times this page is referenced by a page table. ...
structrcu_headrcu;refcount_trcu_users;intpagefault_disabled;}; 2.2、打印task_struct字段2.2.1、代码设计思路: 系统中的进程数量巨大,为了方便管理,于是推出了进程链表的概念,每个进程链表由指向PCB的指针组成,在struct task_struct中定义为tasks字段。其大概结构如图所示: ...
structfile {//fs.hunion {structllist_node fu_llist;structrcu_head fu_rcuhead; } f_u;structpath f_path;structinode *f_inode;conststructfile_operations *f_op; spinlock_t f_lock;enumrw_hint f_write_hint; atomic_long_t f_count; ...
struct hlist_head preempt_notifiers; #endif (6)、FPU使用计数 unsigned char fpu_counter; (7)、 blktrace是一个针对Linux内核中块设备I/O层的跟踪工具。 #ifdef CONFIG_BLK_DEV_IO_TRACE unsigned int btrace_seq; #endif (8)、RCU同步原语