shrink_dcache_parent

Name:prune dcache

Proto:void shrink_dcache_parent(struct dentry *parent)

Type:void

Parameter:

Type	Parameter	Name
struct dentry *	parent

1542

1543

struct select_data data = {start = parent}

1545

Initialization list head

1546

d_walk - walk the dentry tree*@parent: start of walk*@data: data passed to @enter() and @finish()*@enter: callback when first entering the dentry* The @enter() callbacks are called with d_lock held.

1548

If Not list_empty - tests whether a list is empty*@head: the list to test. Then

1549

shrink_dentry_list( & dispose)

1550

Continue

1553

1554

If Not found Then Break

1556

victim = NULL

1557

d_walk - walk the dentry tree*@parent: start of walk*@data: data passed to @enter() and @finish()*@enter: callback when first entering the dentry* The @enter() callbacks are called with d_lock held.

1558

If victim Then

1560

spin_lock( & d_lock)

1561

If Not Lock a dentry from shrink list Then

1562

spin_unlock( & d_lock)

1563

_read_unlock() - marks the end of an RCU read-side critical section.* In most situations, rcu_read_unlock() is immune from deadlock.* However, in kernels built with CONFIG_RCU_BOOST, rcu_read_unlock()

1564

Else

1565

_read_unlock() - marks the end of an RCU read-side critical section.* In most situations, rcu_read_unlock() is immune from deadlock.* However, in kernels built with CONFIG_RCU_BOOST, rcu_read_unlock()

1566

parent = parent directory

1567

If parent != victim Then __dput_to_list(parent, & dispose)

1569

__dentry_kill(victim)

1572

If Not list_empty - tests whether a list is empty*@head: the list to test. Then shrink_dentry_list( & dispose)

**Caller**
Name	Describe
vfs_rename	vfs_rename - rename a filesystem object@old_dir: parent of source@old_dentry: source@new_dir: parent of destination@new_dentry: destination@delegated_inode: returns an inode needing a delegation break@flags: rename flags
do_one_tree
d_invalidate	invalidate a dentry
simple_fill_super	he inodes created here are not hashed. If you use iunique to generate* unique inode values later for this filesystem, then you must take care* to pass it an appropriate max_reserved value to avoid collisions.
shrink_dcache_inode	Try to evict the inode's dentries from the dentry cache. If the inode is a* directory, then it can have at most one dentry; however, that dentry may be* pinned by child dentries, so first try to evict the children too.

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