linux.git/include/trace/events/ext4.h, branch v2.6.34

ext4: Add new tracepoints to debug delayed allocation space functions

2010-01-01T06:00:21+00:00

Add tracepoints for ext4_da_reserve_space(),
ext4_da_update_reserve_space(), and ext4_da_release_space().

Signed-off-by: "Theodore Ts'o"

Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

2009-12-10T17:33:29+00:00

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (47 commits)
  ext4: Fix potential fiemap deadlock (mmap_sem vs. i_data_sem)
  ext4: Do not override ext2 or ext3 if built they are built as modules
  jbd2: Export jbd2_log_start_commit to fix ext4 build
  ext4: Fix insufficient checks in EXT4_IOC_MOVE_EXT
  ext4: Wait for proper transaction commit on fsync
  ext4: fix incorrect block reservation on quota transfer.
  ext4: quota macros cleanup
  ext4: ext4_get_reserved_space() must return bytes instead of blocks
  ext4: remove blocks from inode prealloc list on failure
  ext4: wait for log to commit when umounting
  ext4: Avoid data / filesystem corruption when write fails to copy data
  ext4: Use ext4 file system driver for ext2/ext3 file system mounts
  ext4: Return the PTR_ERR of the correct pointer in setup_new_group_blocks()
  jbd2: Add ENOMEM checking in and for jbd2_journal_write_metadata_buffer()
  ext4: remove unused parameter wbc from __ext4_journalled_writepage()
  ext4: remove encountered_congestion trace
  ext4: move_extent_per_page() cleanup
  ext4: initialize moved_len before calling ext4_move_extents()
  ext4: Fix double-free of blocks with EXT4_IOC_MOVE_EXT
  ext4: use ext4_data_block_valid() in ext4_free_blocks()
  ...

tracing: Convert some ext4 events to DEFINE_TRACE

2009-11-26T08:14:05+00:00

Use DECLARE_EVENT_CLASS to remove duplicate code:

   text    data     bss     dec     hex filename
 294695    6104     340  301139   49853 fs/ext4/ext4.o.old
 289983    6104     324  296411   485db fs/ext4/ext4.o

5 events are convertd:

  ext4__write_begin: ext4_write_begin, ext4_da_write_begin
  ext4__write_end: ext4_{ordered, writeback, journalled}_write_end

No change in functionality.

Signed-off-by: Li Zefan 
Cc: Theodore Ts'o 
Cc: Steven Rostedt 
Cc: Frederic Weisbecker 
LKML-Reference: <4B0E2938.2040708@cn.fujitsu.com>
Signed-off-by: Ingo Molnar

ext4: remove encountered_congestion trace

2009-11-24T16:15:08+00:00

It is no longer set and scheduled to be removed.

Signed-off-by: Wu Fengguang 
Signed-off-by: "Theodore Ts'o"

ext4: print i_mode in octal in ext4 tracepoints

2009-11-23T01:23:31+00:00

Inode permissions are much easier to understand if they are printed in
octal.

Signed-off-by: "Theodore Ts'o"

ext4: call ext4_forget() from ext4_free_blocks()

2009-11-23T12:17:05+00:00

Add the facility for ext4_forget() to be called from
ext4_free_blocks().  This simplifies the code in a large number of
places, and centralizes most of the work of calling ext4_forget() into
a single place.

Also fix a bug in the extents migration code; it wasn't calling
ext4_forget() when releasing the indirect blocks during the
conversion.  As a result, if the system cashed during or shortly after
the extents migration, and the released indirect blocks get reused as
data blocks, the journal replay would corrupt the data blocks.  With
this new patch, fixing this bug was as simple as adding the
EXT4_FREE_BLOCKS_FORGET flags to the call to ext4_free_blocks().

Signed-off-by: "Theodore Ts'o" 
Cc: "Aneesh Kumar K.V"

ext4: add tracepoint for ext4_forget()

2009-11-23T12:25:08+00:00

Signed-off-by: "Theodore Ts'o"

ext4: Add a stub for mpage_da_data in the trace header

2009-09-30T04:51:22+00:00

The tracepoint ext4_da_write_pages has a struct mpage_da_data*
parameter, but that struct is only defined in fs/ext4/ext4.h.  This
patch adds a forward declaration for that struct, so this tracepoint
header can still be used by tools like SystemTap.

This is a continuation of the fix in commit 3661d286.

http://sourceware.org/bugzilla/show_bug.cgi?id=10703

Signed-off-by: Josh Stone 
Signed-off-by: "Theodore Ts'o"

ext4: Use tracepoints for mb_history trace file

2009-09-30T04:32:42+00:00

The /proc/fs/ext4//mb_history was maintained manually, and had a
number of problems: it required a largish amount of memory to be
allocated for each ext4 filesystem, and the s_mb_history_lock
introduced a CPU contention problem.  

By ripping out the mb_history code and replacing it with ftrace
tracepoints, and we get more functionality: timestamps, event
filtering, the ability to correlate mballoc history with other ext4
tracepoints, etc.

Signed-off-by: "Theodore Ts'o"

ext4: Adjust ext4_da_writepages() to write out larger contiguous chunks

2009-09-29T17:31:31+00:00

Work around problems in the writeback code to force out writebacks in
larger chunks than just 4mb, which is just too small.  This also works
around limitations in the ext4 block allocator, which can't allocate
more than 2048 blocks at a time.  So we need to defeat the round-robin
characteristics of the writeback code and try to write out as many
blocks in one inode before allowing the writeback code to move on to
another inode.  We add a a new per-filesystem tunable,
max_writeback_mb_bump, which caps this to a default of 128mb per
inode.

Signed-off-by: "Theodore Ts'o"