linux-toradex.git/fs/ext4/fsync.c, branch v2.6.31.2

ext4: convert instrumentation from markers to tracepoints

2009-06-17T15:48:11+00:00

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

ext4: Add debugging markers that can be used by systemtap

2008-10-06T00:50:06+00:00

This debugging markers are designed to debug problems such as the
random filesystem latency problems reported by Arjan.

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

ext4: Fix whitespace checkpatch warnings/errors

2008-09-09T02:25:24+00:00

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

ext4: call blkdev_issue_flush on fsync

2008-07-11T23:27:31+00:00

To ensure that bits are truly on-disk after an fsync,
we should call blkdev_issue_flush if barriers are supported.

Inspired by an old thread on barriers, by reiserfs & xfs
which do the same, and by a patch SuSE ships with their kernel

Signed-off-by: Eric Sandeen 
Signed-off-by: Mingming Cao 
Signed-off-by: "Theodore Ts'o"

ext4: move headers out of include/linux

2008-04-29T22:13:32+00:00

Move ext4 headers out of include/linux.  This is just the trivial move,
there's some more thing that could be done later. 

Signed-off-by: Christoph Hellwig 
Signed-off-by: Mingming Cao 
Signed-off-by: "Theodore Ts'o"

ext4: fdatasync should skip metadata writeout when overwriting

2008-04-17T14:38:59+00:00

Currently fdatasync is identical to fsync in ext3.

I think fdatasync should skip journal flush in data=ordered and
data=writeback mode when it overwrites to already-instantiated blocks on
HDD.  When I_DIRTY_DATASYNC flag is not set, fdatasync should skip journal
writeout because this indicates only atime or/and mtime updates.

Following patch is the same approach of ext2's fsync code(ext2_sync_file).

I did a performance test using the sysbench.

#sysbench --num-threads=128 --max-requests=50000 --test=fileio --file-total-size=128G
--file-test-mode=rndwr --file-fsync-mode=fdatasync run

The result on ext3 was:

	-2.6.24
	Operations performed:  0 Read, 50080 Write, 59600 Other = 109680 Total
	Read 0b  Written 782.5Mb  Total transferred 782.5Mb  (12.116Mb/sec)
	  775.45 Requests/sec executed

	Test execution summary:
	    total time:                          64.5814s
	    total number of events:              50080
	    total time taken by event execution: 3713.9836
	    per-request statistics:
	         min:                            0.0000s
	         avg:                            0.0742s
	         max:                            0.9375s
	         approx.  95 percentile:         0.2901s

	Threads fairness:
	    events (avg/stddev):           391.2500/23.26
	    execution time (avg/stddev):   29.0155/1.99

	-2.6.24-patched
	Operations performed:  0 Read, 50009 Write, 61596 Other = 111605 Total
	Read 0b  Written 781.39Mb  Total transferred 781.39Mb  (16.419Mb/sec)
	1050.83 Requests/sec executed

	Test execution summary:
	    total time:                          47.5900s
	    total number of events:              50009
	    total time taken by event execution: 2934.5768
	    per-request statistics:
 	         min:                            0.0000s
	         avg:                            0.0587s
 	         max:                            0.8938s
	         approx.  95 percentile:         0.1993s

	Threads fairness:
	    events (avg/stddev):           390.6953/22.64
	    execution time (avg/stddev):   22.9264/1.17

Filesystem I/O throughput was improved.

Signed-off-by :Hisashi Hifumi 
Acked-by: Jan Kara 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: "Theodore Ts'o"

ext4: sparse fixes

2007-10-17T22:50:03+00:00

Signed-off-by: Aneesh Kumar K.V

[PATCH] jbd2: enable building of jbd2 and have ext4 use it rather than jbd

2006-10-11T18:14:16+00:00

Reworked from a patch by Mingming Cao and Randy Dunlap

Signed-off-By: Randy Dunlap 
Signed-off-by: Mingming Cao 
Signed-off-by: Dave Kleikamp 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] ext4: rename ext4 symbols to avoid duplication of ext3 symbols

2006-10-11T18:14:15+00:00

Mingming Cao originally did this work, and Shaggy reproduced it using some
scripts from her.

Signed-off-by: Mingming Cao 
Signed-off-by: Dave Kleikamp 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] ext4: initial copy of files from ext3

2006-10-11T18:14:15+00:00

Start of the ext4 patch series.  See Documentation/filesystems/ext4.txt for
details.

This is a simple copy of the files in fs/ext3 to fs/ext4 and
/usr/incude/linux/ext3* to /usr/include/ex4*

Signed-off-by: Dave Kleikamp 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds