super_cache

函数名称：One thing we have to be careful of with a per-sb shrinker is that we don't* drop the last active reference to the superblock from within the shrinker.* If that happens we could trigger unregistering the shrinker from within the

函数原型：static unsigned long super_cache_scan(struct shrinker *shrink, struct shrink_control *sc)

返回类型：unsigned long

参数：

类型	参数	名称
struct shrinker *	shrink
struct shrink_control *	sc

fs_objects等于0

freed等于0

sb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.(shrink, structsuper_block, s_shrink)

如果非gfp_mask按位与__GFP_FS的值则返回:SHRINK_STOP

如果非rylock_super - try to grab ->s_umount shared*@sb: reference we are trying to grab* Try to prevent fs shutdown. This is used in places where we* cannot take an active reference but we need to ensure that the则返回:SHRINK_STOP

如果nr_cached_objects则fs_objects等于nr_cached_objects(sb, sc)

inodes等于list_lru_shrink_count( & s_inode_lru, sc)

dentries等于list_lru_shrink_count( & s_dentry_lru, sc)

total_objects等于dentries加inodes加fs_objects加1

如果非total_objects则total_objects等于1

dentries等于Multiplies an integer by a fraction, while avoiding unnecessary* overflow or loss of precision.(nr_to_scan, dentries, total_objects)

inodes等于Multiplies an integer by a fraction, while avoiding unnecessary* overflow or loss of precision.(nr_to_scan, inodes, total_objects)

fs_objects等于Multiplies an integer by a fraction, while avoiding unnecessary* overflow or loss of precision.(nr_to_scan, fs_objects, total_objects)

104

nr_to_scan等于dentries加1

105

freed等于prune_dcache_sb(sb, sc)

106

nr_to_scan等于inodes加1

107

freed加等于de.c

109

如果fs_objects则

110

nr_to_scan等于fs_objects加1

111

freed加等于free_cached_objects(sb, sc)

114

lease a read lock

115

返回:freed

源代码转换工具开放的插件接口	X
支持：c/c++/esqlc/java Oracle/Informix/Mysql 插件可实现：逻辑报告代码生成和批量转换代码

函数逻辑报告