Dcache

dentry_hashtable (d_hash chains)

unused dentries (d_lru chains)

namei

iii_lookup

d_add

prune

d_invalidate

d_drop

• namei tries cache: d_lookup

  • ddd_compare

• Success: ddd_revalidate

  • d_invalidate if fails
  • proceed if success

• Failure: iii_lookup

  • find inode
  • iget
    • sss_read_inode
  • finish:
    • d_add
  • can give negative entry in dcache

dhash(parent, name) list head

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