函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:fs\inode.c Create Date:2022-07-29 10:38:04
Last Modify:2020-03-18 19:19:59 Copyright©Brick
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函数名称：Isolate the inode from the LRU in preparation for freeing it

函数原型：static enum lru_status inode_lru_isolate(struct list_head *item, struct list_lru_one *lru, spinlock_t *lru_lock, void *arg)

返回类型：enum lru_status

参数：

类型参数名称
struct list_head *item
struct list_lru_one *lru
spinlock_t *lru_lock
void *arg
734  freeable等于arg
735  inode等于container_of - cast a member of a structure out to the containing structure*@ptr: the pointer to the member.*@type: the type of the container struct this is embedded in.*@member: the name of the member within the struct.(item, structinode, i_lru)
741  如果非spin_trylock( & _blocks, i_bytes, maybe i_size )则返回:m cannot be locked, skip
748  如果atomic_read( & i_count)或Misc 按位与I_REFERENCED的反则
750  list_lru_isolate(lru, & de LRU list )
751  自旋锁解锁
752  this_cpu_dec(nr_unused)
753  返回:m removed from list
757  如果Misc 按位与I_REFERENCED则
758  Misc 与等于I_REFERENCED的反
759  自旋锁解锁
760  返回:m referenced, give another pass
763  如果inode_has_buffers(inode)或nrpages则
764  __iget(inode)
765  自旋锁解锁
766  自旋锁解锁
767  如果remove_inode_buffers(inode)则
769  reap等于validate_mapping_pages - Invalidate all the unlocked pages of one inode*@mapping: the address_space which holds the pages to invalidate*@start: the offset 'from' which to invalidate*@end: the offset 'to' which to invalidate (inclusive)* This function only
770  如果current_is_kswapd()则__count_vm_events(KSWAPD_INODESTEAL, reap)
772  否则__count_vm_events(PGINODESTEAL, reap)
774  如果reclaim_state则reclaimed_slab加等于reap
777  放置一个索引节点
778  加自旋锁
779  返回:m not freeable. May drop the lockinternally, but has to return locked.
782  WARN_ON(Misc & I_NEW)
783  Misc 或等于I_FREEING
784  list_lru_isolate_move(lru, & de LRU list , freeable)
785  自旋锁解锁
787  this_cpu_dec(nr_unused)
788  返回:m removed from list