linux-toradex.git/fs/jbd2/commit.c, branch v2.6.35.1

blkdev: generalize flags for blkdev_issue_fn functions

2010-04-28T17:47:36+00:00

The patch just convert all blkdev_issue_xxx function to common
set of flags. Wait/allocation semantics preserved.

Signed-off-by: Dmitry Monakhov 
Signed-off-by: Jens Axboe

jbd2: clean up an assertion in jbd2_journal_commit_transaction()

2010-02-24T17:11:20+00:00

commit_transaction has the same value as journal->j_running_transaction,
so we can simplify the assert statement.

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

jbd2: delay discarding buffers in journal_unmap_buffer

2010-02-15T21:35:42+00:00

Delay discarding buffers in journal_unmap_buffer until
we know that "add to orphan" operation has definitely been
committed, otherwise the log space of committing transation
may be freed and reused before truncate get committed, updates
may get lost if crash happens.

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

ext4, jbd2: Add barriers for file systems with exernal journals

2009-12-23T11:52:08+00:00

This is a bit complicated because we are trying to optimize when we
send barriers to the fs data disk.  We could just throw in an extra
barrier to the data disk whenever we send a barrier to the journal
disk, but that's not always strictly necessary.

We only need to send a barrier during a commit when there are data
blocks which are must be written out due to an inode written in
ordered mode, or if fsync() depends on the commit to force data blocks
to disk.  Finally, before we drop transactions from the beginning of
the journal during a checkpoint operation, we need to guarantee that
any blocks that were flushed out to the data disk are firmly on the
rust platter before we drop the transaction from the journal.

Thanks to Oleg Drokin for pointing out this flaw in ext3/ext4.

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

Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6

2009-12-11T23:31:13+00:00

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6: (21 commits)
  ext3: PTR_ERR return of wrong pointer in setup_new_group_blocks()
  ext3: Fix data / filesystem corruption when write fails to copy data
  ext4: Support for 64-bit quota format
  ext3: Support for vfsv1 quota format
  quota: Implement quota format with 64-bit space and inode limits
  quota: Move definition of QFMT_OCFS2 to linux/quota.h
  ext2: fix comment in ext2_find_entry about return values
  ext3: Unify log messages in ext3
  ext2: clear uptodate flag on super block I/O error
  ext2: Unify log messages in ext2
  ext3: make "norecovery" an alias for "noload"
  ext3: Don't update the superblock in ext3_statfs()
  ext3: journal all modifications in ext3_xattr_set_handle
  ext2: Explicitly assign values to on-disk enum of filetypes
  quota: Fix WARN_ON in lookup_one_len
  const: struct quota_format_ops
  ubifs: remove manual O_SYNC handling
  afs: remove manual O_SYNC handling
  kill wait_on_page_writeback_range
  vfs: Implement proper O_SYNC semantics
  ...

kill wait_on_page_writeback_range

2009-12-10T14:02:50+00:00

All callers really want the more logical filemap_fdatawait_range interface,
so convert them to use it and merge wait_on_page_writeback_range into
filemap_fdatawait_range.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Jan Kara

jbd2: Add ENOMEM checking in and for jbd2_journal_write_metadata_buffer()

2009-12-01T14:04:42+00:00

OOM happens.

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

jbd2: Use tracepoints for history file

2009-09-30T04:32:06+00:00

The /proc/fs/jbd2//history was maintained manually; by using
tracepoints, we can get all of the existing functionality of the /proc
file plus extra capabilities thanks to the ftrace infrastructure.  We
save memory as a bonus.

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

ext4: Fix async commit mode to be safe by using a barrier

2009-09-11T13:30:12+00:00

Previously the journal_async_commit mount option was equivalent to
using barrier=0 (and just as unsafe).  This patch fixes it so that we
eliminate the barrier before the commit block (by not using ordered
mode), and explicitly issuing an empty barrier bio after writing the
commit block.  Because of the journal checksum, it is safe to do this;
if the journal blocks are not all written before a power failure, the
checksum in the commit block will prevent the last transaction from
being replayed.

Using the fs_mark benchmark, using journal_async_commit shows a 50%
improvement:

FSUse%        Count         Size    Files/sec     App Overhead
     8         1000        10240         30.5            28242

vs.

FSUse%        Count         Size    Files/sec     App Overhead
     8         1000        10240         45.8            28620


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

writeback: get rid of wbc->for_writepages

2009-09-16T13:16:18+00:00

It's only set, it's never checked. Kill it.

Acked-by: Jan Kara 
Signed-off-by: Jens Axboe