[PATCH v6 00/10] speculative preallocation inode tracking

[Brian Foster <bfoster@redhat.com>]

Hi all,

Sorry for the delay. Here is v6 of the speculative prealloc tracking patchset.
The first 5 patches are basically unchanged, the xfs_quota_type() patch is
dropped and the subsequent patches have been reworked to gear the eofblocks
ioctl() to filter based on inode ID's rather than being quota-centric, related to
the following discussion:

http://oss.sgi.com/archives/xfs/2012-10/msg00439.html

My initial intent was to leave the ability to filter on multiple ID's
concurrently as a follow-on change, but it seemed relatively straightforward as I
was hacking on this so I included it in this set (patch 8). It is included as a
standalone patch so I can leave it or drop it if necessary.

This set has been tested via xfstests with debug on and off with no obvious
regressions and sanity tested via Dave's xfs_spaceman tool and the prealloc add-on
(which I will post an update for as well).

Brian

v6:
- Added reviewed-by's from Dave and Mark.
- Pad struct xfs_eofblocks out to 128 bytes.
- Replaced quota ID and quota type with specific inode ID fields and associated
  control flags.
- Minimum file size field to 64-bit.
- Various style and ioctl() validation fixes.
- Renamed background scanning control file and increased max interval to a 24H
  timeframe.

v5:
- Rebased against the die-xfssyncd-die patchset.
- Renamed xfs_inodes_free_eofblocks() to xfs_icache_free_eofblocks().
- Migrated xfs_can_free_eofblocks() from static inline to xfs_inode.c.
- Fixed xfs_eofblocks version field and added version check to ioctl().
- Reworked quota filtering to use standard quota fields. Added patch 7 to
  support.
- Split min. file size filtering into a separate patch.
- Reworked background scanning based on rebase. Created a new eofblocks
  workqueue, renamed the tunable and based its value in seconds.

v4:
- Fix the broken need_iolock parameter to the xfs_free_eofblocks() call in
  patch 5 (thanks to Ben M. for testing). This is a one line change. All
  other patches equivalent to v3. This version survives an xfstests run (with
  XFS_DEBUG enabled this time :P).

v3:
- Pushed dirty cache check up into patch 5 (minor clean up).
- Reworked xfs_can_free_eofblocks() in patch 3 as per Dave C.'s review.
- Rebased from linus' tree to the XFS tree.

v2:
- Remove unnecessary inode flag clear helper.
- Condense eofblocks set/clear tag functions.
- Move clear tag call into xfs_free_eofblocks().
- Modify AG walk infrastructure to support tag-based walk and utilize this
  functionality for the eofblocks scan (as opposed to the previous code
  duplicated from reclaim scanning).
- Improve ioctl functionality: new data structure fields/flags, validate quota
  is enabled.
- Increase default background scanning interval to 5 minutes, add tunable.

Brian Foster (10):
  xfs: add EOFBLOCKS inode tagging/untagging
  xfs: support a tag-based inode_ag_iterator
  xfs: create helper to check whether to free eofblocks on inode
  xfs: make xfs_free_eofblocks() non-static, return EAGAIN on trylock
    failure
  xfs: create function to scan and clear EOFBLOCKS inodes
  xfs: add XFS_IOC_FREE_EOFBLOCKS ioctl
  xfs: add inode id filtering to eofblocks scan
  xfs: support multiple inode id filtering in eofblocks scan
  xfs: add minimum file size filtering to eofblocks scan
  xfs: add background scanning to clear eofblocks inodes

 fs/xfs/xfs_ag.h          |    1 +
 fs/xfs/xfs_fs.h          |   26 ++++++
 fs/xfs/xfs_globals.c     |    4 +-
 fs/xfs/xfs_icache.c      |  225 ++++++++++++++++++++++++++++++++++++++++++++--
 fs/xfs/xfs_icache.h      |   12 ++-
 fs/xfs/xfs_inode.c       |   37 ++++++++
 fs/xfs/xfs_inode.h       |    1 +
 fs/xfs/xfs_ioctl.c       |   20 ++++
 fs/xfs/xfs_iomap.c       |    8 ++
 fs/xfs/xfs_iops.c        |    4 +
 fs/xfs/xfs_linux.h       |    1 +
 fs/xfs/xfs_mount.c       |    2 +
 fs/xfs/xfs_mount.h       |    3 +
 fs/xfs/xfs_qm_syscalls.c |    5 +-
 fs/xfs/xfs_super.c       |    9 ++
 fs/xfs/xfs_sysctl.c      |    9 ++
 fs/xfs/xfs_sysctl.h      |    1 +
 fs/xfs/xfs_trace.h       |    6 ++
 fs/xfs/xfs_vnodeops.c    |   27 +++---
 fs/xfs/xfs_vnodeops.h    |    1 +
 20 files changed, 375 insertions(+), 27 deletions(-)

-- 
1.7.7.6

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