1. 13 Aug, 2008 3 commits
  2. 29 Apr, 2008 1 commit
    • Christoph Hellwig's avatar
      [XFS] shrink mrlock_t · 579aa9ca
      Christoph Hellwig authored
      The writer field is not needed for non_DEBU builds so remove it. While
      we're at i also clean up the interface for is locked asserts to go through
      and xfs_iget.c helper with an interface like the xfs_ilock routines to
      isolated the XFS codebase from mrlock internals. That way we can kill
      mrlock_t entirely once rw_semaphores grow an islocked facility. Also
      remove unused flags to the ilock family of functions.
      
      SGI-PV: 976035
      SGI-Modid: xfs-linux-melb:xfs-kern:30902a
      Signed-off-by: default avatarChristoph Hellwig <hch@infradead.org>
      Signed-off-by: default avatarLachlan McIlroy <lachlan@sgi.com>
      579aa9ca
  3. 18 Apr, 2008 1 commit
    • David Chinner's avatar
      [XFS] Remove the xfs_icluster structure · bad55843
      David Chinner authored
      Remove the xfs_icluster structure and replace with a radix tree lookup.
      
      We don't need to keep a list of inodes in each cluster around anymore as
      we can look them up quickly when we need to. The only time we need to do
      this now is during inode writeback.
      
      Factor the inode cluster writeback code out of xfs_iflush and convert it
      to use radix_tree_gang_lookup() instead of walking a list of inodes built
      when we first read in the inodes.
      
      This remove 3 pointers from each xfs_inode structure and the xfs_icluster
      structure per inode cluster. Hence we reduce the cache footprint of the
      xfs_inodes by between 5-10% depending on cluster sparseness.
      
      To be truly efficient we need a radix_tree_gang_lookup_range() call to
      stop searching once we are past the end of the cluster instead of trying
      to find a full cluster's worth of inodes.
      
      Before (ia64):
      
      $ cat /sys/slab/xfs_inode/object_size 536
      
      After:
      
      $ cat /sys/slab/xfs_inode/object_size 512
      
      SGI-PV: 977460
      SGI-Modid: xfs-linux-melb:xfs-kern:30502a
      Signed-off-by: default avatarDavid Chinner <dgc@sgi.com>
      Signed-off-by: default avatarChristoph Hellwig <hch@infradead.org>
      Signed-off-by: default avatarLachlan McIlroy <lachlan@sgi.com>
      bad55843
  4. 06 Mar, 2008 1 commit
  5. 07 Feb, 2008 5 commits
  6. 10 Dec, 2007 1 commit
    • David Chinner's avatar
      [XFS] Fix broken inode cluster setup. · a7430847
      David Chinner authored
      The radix tree based inode caches did away with the inode cluster hashes,
      replacing them with a bunch of masking and gang lookups on the radix tree.
      
      This masking got broken when moving the code to per-ag radix trees and
      indexing by agino # rather than straight inode number. The result is
      clustered inode writeback does not cluster and things can go extremely
      slowly when there are lots of inodes to write.
      
      Fix it up by comparing the agino # of the inode we just looked up to the
      index of the cluster we are looking for.
      Tested-by: default avatarTorsten Kaiser <just.for.lkml@googlemail.com>
      
      SGI-PV: 972915
      SGI-Modid: xfs-linux-melb:xfs-kern:30033a
      Signed-off-by: default avatarDavid Chinner <dgc@sgi.com>
      Signed-off-by: default avatarLachlan McIlroy <lachlan@sgi.com>
      a7430847
  7. 16 Oct, 2007 6 commits
  8. 15 Oct, 2007 1 commit
    • David Chinner's avatar
      [XFS] Radix tree based inode caching · da353b0d
      David Chinner authored
      One of the perpetual scaling problems XFS has is indexing it's incore
      inodes. We currently uses hashes and the default hash sizes chosen can
      only ever be a tradeoff between memory consumption and the maximum
      realistic size of the cache.
      
      As a result, anyone who has millions of inodes cached on a filesystem
      needs to tunes the size of the cache via the ihashsize mount option to
      allow decent scalability with inode cache operations.
      
      A further problem is the separate inode cluster hash, whose size is based
      on the ihashsize but is smaller, and so under certain conditions (sparse
      cluster cache population) this can become a limitation long before the
      inode hash is causing issues.
      
      The following patchset removes the inode hash and cluster hash and
      replaces them with radix trees to avoid the scalability limitations of the
      hashes. It also reduces the size of the inodes by 3 pointers....
      
      SGI-PV: 969561
      SGI-Modid: xfs-linux-melb:xfs-kern:29481a
      Signed-off-by: default avatarDavid Chinner <dgc@sgi.com>
      Signed-off-by: default avatarChristoph Hellwig <hch@infradead.org>
      Signed-off-by: default avatarTim Shimmin <tes@sgi.com>
      da353b0d
  9. 08 May, 2007 1 commit
  10. 11 Nov, 2006 3 commits
  11. 28 Sep, 2006 5 commits
  12. 20 Jun, 2006 1 commit
  13. 18 Jun, 2006 1 commit
  14. 09 Jun, 2006 2 commits
  15. 11 Apr, 2006 1 commit
  16. 28 Mar, 2006 1 commit
  17. 17 Mar, 2006 1 commit
  18. 11 Jan, 2006 1 commit
  19. 02 Nov, 2005 2 commits
  20. 04 Sep, 2005 1 commit
  21. 02 Sep, 2005 1 commit