• Linus Torvalds's avatar
    Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs · 9613bebb
    Linus Torvalds authored
    Pull btrfs fixes and features from Chris Mason:
     "We've merged in the error handling patches from SuSE.  These are
      already shipping in the sles kernel, and they give btrfs the ability
      to abort transactions and go readonly on errors.  It involves a lot of
      churn as they clarify BUG_ONs, and remove the ones we now properly
      deal with.
    
      Josef reworked the way our metadata interacts with the page cache.
      page->private now points to the btrfs extent_buffer object, which
      makes everything faster.  He changed it so we write an whole extent
      buffer at a time instead of allowing individual pages to go down,,
      which will be important for the raid5/6 code (for the 3.5 merge
      window ;)
    
      Josef also made us more aggressive about dropping pages for metadata
      blocks that were freed due to COW.  Overall, our metadata caching is
      much faster now.
    
      We've integrated my patch for metadata bigger than the page size.
      This allows metadata blocks up to 64KB in size.  In practice 16K and
      32K seem to work best.  For workloads with lots of metadata, this cuts
      down the size of the extent allocation tree dramatically and fragments
      much less.
    
      Scrub was updated to support the larger block sizes, which ended up
      being a fairly large change (thanks Stefan Behrens).
    
      We also have an assortment of fixes and updates, especially to the
      balancing code (Ilya Dryomov), the back ref walker (Jan Schmidt) and
      the defragging code (Liu Bo)."
    
    Fixed up trivial conflicts in fs/btrfs/scrub.c that were just due to
    removal of the second argument to k[un]map_atomic() in commit
    7ac687d9.
    
    * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (75 commits)
      Btrfs: update the checks for mixed block groups with big metadata blocks
      Btrfs: update to the right index of defragment
      Btrfs: do not bother to defrag an extent if it is a big real extent
      Btrfs: add a check to decide if we should defrag the range
      Btrfs: fix recursive defragment with autodefrag option
      Btrfs: fix the mismatch of page->mapping
      Btrfs: fix race between direct io and autodefrag
      Btrfs: fix deadlock during allocating chunks
      Btrfs: show useful info in space reservation tracepoint
      Btrfs: don't use crc items bigger than 4KB
      Btrfs: flush out and clean up any block device pages during mount
      btrfs: disallow unequal data/metadata blocksize for mixed block groups
      Btrfs: enhance superblock sanity checks
      Btrfs: change scrub to support big blocks
      Btrfs: minor cleanup in scrub
      Btrfs: introduce common define for max number of mirrors
      Btrfs: fix infinite loop in btrfs_shrink_device()
      Btrfs: fix memory leak in resolver code
      Btrfs: allow dup for data chunks in mixed mode
      Btrfs: validate target profiles only if we are going to use them
      ...
    9613bebb
free-space-cache.c 72.4 KB