Inode Cache

Dirty inodes

Inode_hashtable

1. iget: if i_countɬ ++

2. iput: if i_countɭ - -

sss_write_inode

(sync one)

Used inodes

Unused inodes

sss_read_inode

(iget)

sss_clear_inode

(freeing inos)

or

sss_delete_inode

(iput)

media fs only

(mark_inode_dirty)

3. free_inodes

4. syncing inodes

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