/* * 如果设置了PG_private标志,则private字段指向struct buffer_head * 如果设置了PG_compound,则指向struct page * 如果设置了PG_swapcache标志,private存储了该page在交换分区中对应的位置信息swp_entry_t * 如果_mapcount = PAGE_BUDDY_MAPCOUNT_VALUE,说明该page位于伙伴系统,private存储该伙伴的阶 */ unsign...
* Usually used for buffer_heads if PagePrivate. * Used for swp_entry_t if PageSwapCache. * Indicates order in the buddy system if PageBuddy. */ unsigned long private; }; 主要成员说明: struct list_head lru:为LRU链表,该链表会根据页面不同的用途挂载到不同的链表, 如在空闲时刻,被buddy系统...
structpage **pprev_hash; structbuffer_head * buffers; void*virtual; structzone_struct *zone; } mem_map_t; 对每个域的描述如下: list:指向链表中的下一页 mapping:用来指定我们正在映射的索引节点(inode) index:在映射表中的偏移 next_hash:指向页高速缓存哈希表中下一个共享的页 ...
unsignedlong_head_2;/*public:*/void*_hugetlb_subpool;void*_hugetlb_cgroup;void*_hugetlb_cgroup_rsvd;void*_hugetlb_hwpoison;/*private: the union with struct page is transitional*/};struct{ unsignedlong_flags_2a; unsignedlong_head_2a;/*public:*/structlist_head _deferred_list;/*private: t...
structlist_headlru; /* Or, for the Unevictable "LRU list" slot */ struct{ /* Always even, to negate PageTail */ void*__filler; /* Count page's or folio's mlocks */ unsignedintmlock_count; }; /* Or, free page */ structlist_headbuddy_list; ...
struct sk_buff_head { struct sk_buff -*next; struct sk_buff -*prev; __u32 qlen; spinlock_t lock; }; qlen代表链表元素的个数 lock用于防止对链表的并发访问 sk_buff和sk_buff_head的前两个元素是一样的:next和prev指针。这使得它们可以放到同一个链表中,尽管 sk_buff_head要比sk_buff小得多。
* usually used for buffer_heads * if PagePrivate set; used for * swp_entry_t if PageSwapCache; * indicates order in the buddy * system if PG_buddy is set. */ #if USE_SPLIT_PTLOCKS spinlock_t ptl; #endif struct kmem_cache *slab; /* SLUB: Pointer to slab */ ...
+++ b/e2fsck/journal.c @@ -285,9 +285,9 @@ static int ext4_fc_replay_scan(journal_t *j, struct buffer_head *bh, struct e2fsck_fc_replay_state *state; int ret = JBD2_FC_REPLAY_CONTINUE; struct ext4_fc_add_range *ext; - struct ext4_fc_tl *tl; ...
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: ...
head['filesize'] =filesize json_head=json.dumps(head) bytes_head= json_head.encode('utf-8')#计算head的长度head_len =len(bytes_head) pack_len= struct.pack('i',head_len) sk.send(pack_len) sk.send(bytes_head) with open(file_path,'rb') as f:whilefilesize:iffilesize >=buffer: ...