1. 09 9月, 2008 1 次提交
  2. 12 7月, 2008 1 次提交
  3. 30 4月, 2008 1 次提交
  4. 17 4月, 2008 1 次提交
    • H
      ext4: fdatasync should skip metadata writeout when overwriting · 53c550e9
      Hisashi Hifumi 提交于
      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 <hifumi.hisashi@oss.ntt.co.jp>
      Acked-by: NJan Kara <jack@suse.cz>
      Cc: <linux-ext4@vger.kernel.org>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>
      53c550e9
  5. 18 10月, 2007 1 次提交
  6. 12 10月, 2006 3 次提交
  7. 27 9月, 2006 1 次提交
  8. 17 4月, 2005 1 次提交
    • L
      Linux-2.6.12-rc2 · 1da177e4
      Linus Torvalds 提交于
      Initial git repository build. I'm not bothering with the full history,
      even though we have it. We can create a separate "historical" git
      archive of that later if we want to, and in the meantime it's about
      3.2GB when imported into git - space that would just make the early
      git days unnecessarily complicated, when we don't have a lot of good
      infrastructure for it.
      
      Let it rip!
      1da177e4