Skip to content

L
linux
An error occurred fetching the project authors.
Switch branch/tag
  1. 28 Jul, 2008 2 commits
  3. 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
  5. 18 Apr, 2008 7 commits
  7. 10 Apr, 2008 1 commit
  9. 07 Feb, 2008 4 commits
  11. 16 Oct, 2007 1 commit
  13. 15 Oct, 2007 5 commits
  15. 14 Jul, 2007 5 commits
    • Eric Sandeen's avatar
      [XFS] Clean up function name handling in tracing code · 3a59c94c
      Eric Sandeen authored 
      Remove the hardcoded "fnames" for tracing, and just embed them in tracing
macros via __FUNCTION__. Kills a lot of #ifdefs too.

SGI-PV: 967353
SGI-Modid: xfs-linux-melb:xfs-kern:29099a
Signed-off-by: default avatarEric Sandeen <sandeen@sandeen.net>
Signed-off-by: default avatarDavid Chinner <dgc@sgi.com>
Signed-off-by: default avatarTim Shimmin <tes@sgi.com>
      3a59c94c
    • David Chinner's avatar
      [XFS] Concurrent Multi-File Data Streams · 2a82b8be
      David Chinner authored 
      In media spaces, video is often stored in a frame-per-file format. When
dealing with uncompressed realtime HD video streams in this format, it is
crucial that files do not get fragmented and that multiple files a placed
contiguously on disk.

When multiple streams are being ingested and played out at the same time,
it is critical that the filesystem does not cross the streams and
interleave them together as this creates seek and readahead cache miss
latency and prevents both ingest and playout from meeting frame rate
targets.

This patch set creates a "stream of files" concept into the allocator to
place all the data from a single stream contiguously on disk so that RAID
array readahead can be used effectively. Each additional stream gets
placed in different allocation groups within the filesystem, thereby
ensuring that we don't cross any streams. When an AG fills up, we select a
new AG for the stream that is not in use.

The core of the functionality is the stream tracking - each inode that we
create in a directory needs to be associated with the directories' stream.
Hence every time we create a file, we look up the directories' stream
object and associate the new file with that object.

Once we have a stream object for a file, we use the AG that the stream
object point to for allocations. If we can't allocate in that AG (e.g. it
is full) we move the entire stream to another AG. Other inodes in the same
stream are moved to the new AG on their next allocation (i.e. lazy
update).

Stream objects are kept in a cache and hold a reference on the inode.
Hence the inode cannot be reclaimed while there is an outstanding stream
reference. This means that on unlink we need to remove the stream
association and we also need to flush all the associations on certain
events that want to reclaim all unreferenced inodes (e.g. filesystem
freeze).

SGI-PV: 964469
SGI-Modid: xfs-linux-melb:xfs-kern:29096a
Signed-off-by: default avatarDavid Chinner <dgc@sgi.com>
Signed-off-by: default avatarBarry Naujok <bnaujok@sgi.com>
Signed-off-by: default avatarDonald Douwsma <donaldd@sgi.com>
Signed-off-by: default avatarChristoph Hellwig <hch@infradead.org>
Signed-off-by: default avatarTim Shimmin <tes@sgi.com>
Signed-off-by: default avatarVlad Apostolov <vapo@sgi.com>
      2a82b8be
    • Andrew Morton's avatar
      [XFS] Use uninitialized_var macro to stop warning about rtx · 0892ccd6
      Andrew Morton authored 
      Appease gcc in regards to "warning: 'rtx' is used uninitialized in
this function".

SGI-PV: 907752
SGI-Modid: xfs-linux-melb:xfs-kern:29007a
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarTim Shimmin <tes@sgi.com>
      0892ccd6
    • David Chinner's avatar
      [XFS] Cleanup inode extent size hint extraction · 957d0ebe
      David Chinner authored 
      SGI-PV: 966004
SGI-Modid: xfs-linux-melb:xfs-kern:28866a
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>
      957d0ebe
    • David Chinner's avatar
      [XFS] xfs_bmapi fails to update the previous extent pointer · 4e5ae838
      David Chinner authored 
      When processing multiple extent maps, xfs_bmapi needs to keep track of the
extent behind the one it is currently working on to be able to trim extent
ranges correctly. Failing to update the previous pointer can result in
corrupted extent lists in memory and this will result in panics or assert
failures.

Update the previous pointer correctly when we move to the next extent to
process.

SGI-PV: 965631
SGI-Modid: xfs-linux-melb:xfs-kern:28773a
Signed-off-by: default avatarDavid Chinner <dgc@sgi.com>
Signed-off-by: default avatarVlad Apostolov <vapo@sgi.com>
Signed-off-by: default avatarTim Shimmin <tes@sgi.com>
      4e5ae838
  17. 08 May, 2007 3 commits
    • Lachlan McIlroy's avatar
      [XFS] Fix to prevent the notorious 'NULL files' problem after a crash. · ba87ea69
      Lachlan McIlroy authored 
      The problem that has been addressed is that of synchronising updates of
the file size with writes that extend a file. Without the fix the update
of a file's size, as a result of a write beyond eof, is independent of
when the cached data is flushed to disk. Often the file size update would
be written to the filesystem log before the data is flushed to disk. When
a system crashes between these two events and the filesystem log is
replayed on mount the file's size will be set but since the contents never
made it to disk the file is full of holes. If some of the cached data was
flushed to disk then it may just be a section of the file at the end that
has holes.

There are existing fixes to help alleviate this problem, particularly in
the case where a file has been truncated, that force cached data to be
flushed to disk when the file is closed. If the system crashes while the
file(s) are still open then this flushing will never occur.

The fix that we have implemented is to introduce a second file size,
called the in-memory file size, that represents the current file size as
viewed by the user. The existing file size, called the on-disk file size,
is the one that get's written to the filesystem log and we only update it
when it is safe to do so. When we write to a file beyond eof we only
update the in- memory file size in the write operation. Later when the I/O
operation, that flushes the cached data to disk completes, an I/O
completion routine will update the on-disk file size. The on-disk file
size will be updated to the maximum offset of the I/O or to the value of
the in-memory file size if the I/O includes eof.

SGI-PV: 958522
SGI-Modid: xfs-linux-melb:xfs-kern:28322a
Signed-off-by: default avatarLachlan McIlroy <lachlan@sgi.com>
Signed-off-by: default avatarDavid Chinner <dgc@sgi.com>
Signed-off-by: default avatarTim Shimmin <tes@sgi.com>
      ba87ea69
    • Eric Sandeen's avatar
      [XFS] remove more misc. unused args · e9ed9d22
      Eric Sandeen authored 
      Patch provided by Eric Sandeen.

SGI-PV: 961695
SGI-Modid: xfs-linux-melb:xfs-kern:28205a
Signed-off-by: default avatarEric Sandeen <sandeen@sandeen.net>
Signed-off-by: default avatarLachlan McIlroy <lachlan@sgi.com>
Signed-off-by: default avatarTim Shimmin <tes@sgi.com>
      e9ed9d22
    • Eric Sandeen's avatar
      [XFS] The last argument "lsn" of xfs_trans_commit() is always called with · 1c72bf90
      Eric Sandeen authored 
      NULL.

Patch provided by Eric Sandeen.

SGI-PV: 961693
SGI-Modid: xfs-linux-melb:xfs-kern:28199a
Signed-off-by: default avatarEric Sandeen <sandeen@sandeen.net>
Signed-off-by: default avatarLachlan McIlroy <lachlan@sgi.com>
Signed-off-by: default avatarTim Shimmin <tes@sgi.com>
      1c72bf90
  19. 10 Feb, 2007 5 commits
  21. 21 Nov, 2006 1 commit
  23. 28 Sep, 2006 4 commits
  25. 30 Aug, 2006 1 commit
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7