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  1. 03 5月, 2016 1 次提交
  3. 26 3月, 2016 1 次提交
    • R
      ocfs2: record UNWRITTEN extents when populate write desc · 4506cfb6
      由 Ryan Ding 提交于 
      To support direct io in ocfs2_write_begin_nolock & ocfs2_write_end_nolock.

There is still one issue in the direct write procedure.

phase 1: alloc extent with UNWRITTEN flag
phase 2: submit direct data to disk, add zero page to page cache
phase 3: clear UNWRITTEN flag when data has been written to disk

When there are 2 direct write A(0~3KB),B(4~7KB) writing to the same
cluster 0~7KB (cluster size 8KB).  Write request A arrive phase 2 first,
it will zero the region (4~7KB).  Before request A enter to phase 3,
request B arrive phase 2, it will zero region (0~3KB).  This is just like
request B steps request A.

To resolve this issue, we should let request B knows this cluster is already
under zero, to prevent it from steps the previous write request.

This patch will add function ocfs2_unwritten_check() to do this job.  It
will record all clusters that are under direct write(it will be recorded
in the 'ip_unwritten_list' member of inode info), and prevent the later
direct write writing to the same cluster to do the zero work again.
Signed-off-by: NRyan Ding <ryan.ding@oracle.com>
Reviewed-by: NJunxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <joseph.qi@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      4506cfb6
  5. 23 3月, 2016 1 次提交
  7. 23 1月, 2016 1 次提交
    • A
      wrappers for ->i_mutex access · 5955102c
      由 Al Viro 提交于 
      parallel to mutex_{lock,unlock,trylock,is_locked,lock_nested},
inode_foo(inode) being mutex_foo(&inode->i_mutex).

Please, use those for access to ->i_mutex; over the coming cycle
->i_mutex will become rwsem, with ->lookup() done with it held
only shared.
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      5955102c
  9. 09 12月, 2015 1 次提交
    • A
      don't put symlink bodies in pagecache into highmem · 21fc61c7
      由 Al Viro 提交于 
      kmap() in page_follow_link_light() needed to go - allowing to hold
an arbitrary number of kmaps for long is a great way to deadlocking
the system.

new helper (inode_nohighmem(inode)) needs to be used for pagecache
symlinks inodes; done for all in-tree cases.  page_follow_link_light()
instrumented to yell about anything missed.
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      21fc61c7
  11. 05 9月, 2015 4 次提交
  13. 16 4月, 2015 1 次提交
  15. 15 4月, 2015 1 次提交
  17. 17 2月, 2015 1 次提交
  19. 11 12月, 2014 1 次提交
  21. 04 4月, 2014 5 次提交
  23. 09 11月, 2013 1 次提交
  25. 13 2月, 2013 1 次提交
  27. 30 5月, 2012 1 次提交
  29. 06 5月, 2012 1 次提交
  31. 17 11月, 2011 1 次提交
  33. 02 11月, 2011 1 次提交
  35. 31 3月, 2011 1 次提交
  37. 22 2月, 2011 1 次提交
  39. 21 2月, 2011 1 次提交
    • T
      ocfs2: Little refactoring against ocfs2_iget. · 6218b90e
      由 Tao Ma 提交于 
      ocfs2_iget is used to get/create inode. Only iget5_locked
will give us an inode = NULL. So move this check ahead of
ocfs2_read_locked_inode so that we don't need to check
inode before we read and unlock inode. This is also helpful
for trace event(see the next patch).
Signed-off-by: NTao Ma <boyu.mt@taobao.com>
      6218b90e
  41. 07 3月, 2011 1 次提交
    • T
      ocfs2: Remove EXIT from masklog. · c1e8d35e
      由 Tao Ma 提交于 
      mlog_exit is used to record the exit status of a function.
But because it is added in so many functions, if we enable it,
the system logs get filled up quickly and cause too much I/O.
So actually no one can open it for a production system or even
for a test.

This patch just try to remove it or change it. So:
1. if all the error paths already use mlog_errno, it is just removed.
   Otherwise, it will be replaced by mlog_errno.
2. if it is used to print some return value, it is replaced with
   mlog(0,...).
mlog_exit_ptr is changed to mlog(0.
All those mlog(0,...) will be replaced with trace events later.
Signed-off-by: NTao Ma <boyu.mt@taobao.com>
      c1e8d35e
  43. 21 2月, 2011 1 次提交
    • T
      ocfs2: Remove ENTRY from masklog. · ef6b689b
      由 Tao Ma 提交于 
      ENTRY is used to record the entry of a function.
But because it is added in so many functions, if we enable it,
the system logs get filled up quickly and cause too much I/O.
So actually no one can open it for a production system or even
for a test.

So for mlog_entry_void, we just remove it.
for mlog_entry(...), we replace it with mlog(0,...), and they
will be replace by trace event later.
Signed-off-by: NTao Ma <boyu.mt@taobao.com>
      ef6b689b
  45. 02 11月, 2010 1 次提交
  47. 11 9月, 2010 1 次提交
    • G
      Track negative entries v3 · 5e98d492
      由 Goldwyn Rodrigues 提交于 
      Track negative dentries by recording the generation number of the parent
directory in d_fsdata. The generation number for the parent directory is
recorded in the inode_info, which increments every time the lock on the
directory is dropped.

If the generation number of the parent directory and the negative dentry
matches, there is no need to perform the revalidate, else a revalidate
is forced. This improves performance in situations where nodes look for
the same non-existent file multiple times.

Thanks Mark for explaining the DLM sequence.
Signed-off-by: NGoldwyn Rodrigues <rgoldwyn@suse.de>
Signed-off-by: NJoel Becker <joel.becker@oracle.com>
      5e98d492
  49. 08 9月, 2010 1 次提交
  51. 10 8月, 2010 2 次提交
  53. 19 5月, 2010 1 次提交
    • T
      Ocfs2: Optimize ocfs2 truncate to use ocfs2_remove_btree_range() instead. · 78f94673
      由 Tristan Ye 提交于 
      Truncate is just a special case of punching holes(from new i_size to
end), we therefore could take advantage of the existing
ocfs2_remove_btree_range() to reduce the comlexity and redundancy in
alloc.c.  The goal here is to make truncate more generic and
straightforward.

Several functions only used by ocfs2_commit_truncate() will smiply be
removed.

ocfs2_remove_btree_range() was originally used by the hole punching
code, which didn't take refcount trees into account (definitely a bug).
We therefore need to change that func a bit to handle refcount trees.
It must take the refcount lock, calculate and reserve blocks for
refcount tree changes, and decrease refcounts at the end.  We replace 
ocfs2_lock_allocators() here by adding a new func
ocfs2_reserve_blocks_for_rec_trunc() which accepts some extra blocks to
reserve.  This will not hurt any other code using
ocfs2_remove_btree_range() (such as dir truncate and hole punching).

I merged the following steps into one patch since they may be
logically doing one thing, though I know it looks a little bit fat
to review.

1). Remove redundant code used by ocfs2_commit_truncate(), since we're
    moving to ocfs2_remove_btree_range anyway.

2). Add a new func ocfs2_reserve_blocks_for_rec_trunc() for purpose of
    accepting some extra blocks to reserve.

3). Change ocfs2_prepare_refcount_change_for_del() a bit to fit our
    needs.  It's safe to do this since it's only being called by
    truncate.

4). Change ocfs2_remove_btree_range() a bit to take refcount case into
    account.

5). Finally, we change ocfs2_commit_truncate() to call
    ocfs2_remove_btree_range() in a proper way.

The patch has been tested normally for sanity check, stress tests
with heavier workload will be expected.

Based on this patch, fixing the punching holes bug will be fairly easy.
Signed-off-by: NTristan Ye <tristan.ye@oracle.com>
Acked-by: NMark Fasheh <mfasheh@suse.com>
Signed-off-by: NJoel Becker <joel.becker@oracle.com>
      78f94673
  55. 11 5月, 2010 1 次提交
    • J
      ocfs2: Wrap signal blocking in void functions. · e4b963f1
      由 Joel Becker 提交于 
      ocfs2 sometimes needs to block signals around dlm operations, but it
currently does it with sigprocmask().  Even worse, it's checking the
error code of sigprocmask().  The in-kernel sigprocmask() can only error
if you get the SIG_* argument wrong.  We don't.

Wrap the sigprocmask() calls with ocfs2_[un]block_signals().  These
functions are void, but they will BUG() if somehow sigprocmask() returns
an error.
Signed-off-by: NJoel Becker <joel.becker@oracle.com>
      e4b963f1
  57. 06 5月, 2010 3 次提交
    • M
      ocfs2: use allocation reservations for directory data · e3b4a97d
      由 Mark Fasheh 提交于 
      Use the reservations system for unindexed dir tree allocations. We don't
bother with the indexed tree as reads from it are mostly random anyway.
Directory reservations are marked seperately, to allow the reservations code
a chance to optimize their window sizes. This patch allocates only 8 bits
for directory windows as they generally are not expected to grow as quickly
as file data. Future improvements to dir window sizing can trivially be
made.
Signed-off-by: NMark Fasheh <mfasheh@suse.com>
      e3b4a97d
    • M
      ocfs2: use allocation reservations during file write · 4fe370af
      由 Mark Fasheh 提交于 
      Add a per-inode reservations structure and pass it through to the
reservations code.
Signed-off-by: NMark Fasheh <mfasheh@suse.com>
      4fe370af
    • J
      ocfs2: Make ocfs2_journal_dirty() void. · ec20cec7
      由 Joel Becker 提交于 
      jbd[2]_journal_dirty_metadata() only returns 0.  It's been returning 0
since before the kernel moved to git.  There is no point in checking
this error.

ocfs2_journal_dirty() has been faithfully returning the status since the
beginning.  All over ocfs2, we have blocks of code checking this can't
fail status.  In the past few years, we've tried to avoid adding these
checks, because they are pointless.  But anyone who looks at our code
assumes they are needed.

Finally, ocfs2_journal_dirty() is made a void function.  All error
checking is removed from other files.  We'll BUG_ON() the status of
jbd2_journal_dirty_metadata() just in case they change it someday.  They
won't.
Signed-off-by: NJoel Becker <joel.becker@oracle.com>
      ec20cec7
  59. 04 5月, 2010 1 次提交