1. 05 Aug, 2002 1 commit
    • Dave Kleikamp's avatar
      Rework JFS's inode locking · 1c706086
      Dave Kleikamp authored
      In order for JFS to be able to quiesce the current activity, while
      blocking new transactions, the locking needed some rework.  New
      transactions are stopped in the functions txBegin or txBeginAnon,
      where the rdwrlock (IREAD_LOCK/IWRITE_LOCK) may be held.  Dirty
      inodes may need to be committed while new transactions are blocked
      here, so another lock is introduced (commit_sem) which is taken after
      txBegin/txBeginAnon is called.  This ensures that the proper
      serialization takes place, without the write_inode method needing to
      grab the rdwrlock.
      
      In addition, the use of IWRITE_LOCK and IREAD_LOCK has been removed
      from directory inodes.  The serialization done by the VFS using i_sem
      is sufficient to avoid races.
      
      This patch removes JFS's dependency on down_write_trylock.
      1c706086
  2. 02 Aug, 2002 1 commit
  3. 01 Aug, 2002 38 commits