• Linus Torvalds's avatar
    Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 · 9e239bb9
    Linus Torvalds authored
    Pull ext4 update from Ted Ts'o:
     "Lots of bug fixes, cleanups and optimizations.  In the bug fixes
      category, of note is a fix for on-line resizing file systems where the
      block size is smaller than the page size (i.e., file systems 1k blocks
      on x86, or more interestingly file systems with 4k blocks on Power or
      ia64 systems.)
      In the cleanup category, the ext4's punch hole implementation was
      significantly improved by Lukas Czerner, and now supports bigalloc
      file systems.  In addition, Jan Kara significantly cleaned up the
      write submission code path.  We also improved error checking and added
      a few sanity checks.
      In the optimizations category, two major optimizations deserve
      mention.  The first is that ext4_writepages() is now used for
      nodelalloc and ext3 compatibility mode.  This allows writes to be
      submitted much more efficiently as a single bio request, instead of
      being sent as individual 4k writes into the block layer (which then
      relied on the elevator code to coalesce the requests in the block
      queue).  Secondly, the extent cache shrink mechanism, which was
      introduce in 3.9, no longer has a scalability bottleneck caused by the
      i_es_lru spinlock.  Other optimizations include some changes to reduce
      CPU usage and to avoid issuing empty commits unnecessarily."
    * tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (86 commits)
      ext4: optimize starting extent in ext4_ext_rm_leaf()
      jbd2: invalidate handle if jbd2_journal_restart() fails
      ext4: translate flag bits to strings in tracepoints
      ext4: fix up error handling for mpage_map_and_submit_extent()
      jbd2: fix theoretical race in jbd2__journal_restart
      ext4: only zero partial blocks in ext4_zero_partial_blocks()
      ext4: check error return from ext4_write_inline_data_end()
      ext4: delete unnecessary C statements
      ext3,ext4: don't mess with dir_file->f_pos in htree_dirblock_to_tree()
      jbd2: move superblock checksum calculation to jbd2_write_superblock()
      ext4: pass inode pointer instead of file pointer to punch hole
      ext4: improve free space calculation for inline_data
      ext4: reduce object size when !CONFIG_PRINTK
      ext4: improve extent cache shrink mechanism to avoid to burn CPU time
      ext4: implement error handling of ext4_mb_new_preallocation()
      ext4: fix corruption when online resizing a fs with 1K block size
      ext4: delete unused variables
      ext4: return FIEMAP_EXTENT_UNKNOWN for delalloc extents
      jbd2: remove debug dependency on debug_fs and update Kconfig help text
      jbd2: use a single printk for jbd_debug()
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