1. 14 1月, 2014 2 次提交
  2. 08 1月, 2014 2 次提交
    • J
      f2fs: add a sysfs entry to control max_victim_search · b1c57c1c
      Jaegeuk Kim 提交于
      Previously during SSR and GC, the maximum number of retrials to find a victim
      segment was hard-coded by MAX_VICTIM_SEARCH, 4096 by default.
      
      This number makes an effect on IO locality, when SSR mode is activated, which
      results in performance fluctuation on some low-end devices.
      
      If max_victim_search = 4, the victim will be searched like below.
      ("D" represents a dirty segment, and "*" indicates a selected victim segment.)
      
       D1 D2 D3 D4 D5 D6 D7 D8 D9
      [   *       ]
            [   *    ]
                  [         * ]
      	                [ ....]
      
      This patch adds a sysfs entry to control the number dynamically through:
        /sys/fs/f2fs/$dev/max_victim_search
      Signed-off-by: NJaegeuk Kim <jaegeuk.kim@samsung.com>
      b1c57c1c
    • J
      f2fs: improve write performance under frequent fsync calls · fb5566da
      Jaegeuk Kim 提交于
      When considering a bunch of data writes with very frequent fsync calls, we
      are able to think the following performance regression.
      
      N: Node IO, D: Data IO, IO scheduler: cfq
      
      Issue    pending IOs
      	 D1 D2 D3 D4
       D1         D2 D3 D4 N1
       D2            D3 D4 N1 N2
       N1            D3 D4 N2 D1
       --> N1 can be selected by cfq becase of the same priority of N and D.
           Then D3 and D4 would be delayed, resuling in performance degradation.
      
      So, when processing the fsync call, it'd better give higher priority to data IOs
      than node IOs by assigning WRITE and WRITE_SYNC respectively.
      This patch improves the random wirte performance with frequent fsync calls by up
      to 10%.
      Signed-off-by: NJaegeuk Kim <jaegeuk.kim@samsung.com>
      fb5566da
  3. 06 1月, 2014 3 次提交
    • J
      f2fs: add inline_data recovery routine · 1e1bb4ba
      Jaegeuk Kim 提交于
      This patch adds a inline_data recovery routine with the following policy.
      
      [prev.] [next] of inline_data flag
         o       o  -> recover inline_data
         o       x  -> remove inline_data, and then recover data blocks
         x       o  -> remove inline_data, and then recover inline_data
         x       x  -> recover data blocks
      Signed-off-by: NJaegeuk Kim <jaegeuk.kim@samsung.com>
      1e1bb4ba
    • J
      f2fs: add the number of inline_data files to status info · 0dbdc2ae
      Jaegeuk Kim 提交于
      This patch adds the number of inline_data files into the status information.
      Note that the number is reset whenever the filesystem is newly mounted.
      Signed-off-by: NJaegeuk Kim <jaegeuk.kim@samsung.com>
      0dbdc2ae
    • J
      f2fs: refactor f2fs_convert_inline_data · 9e09fc85
      Jaegeuk Kim 提交于
      Change log from v1:
       o handle NULL pointer of grab_cache_page_write_begin() pointed by Chao Yu.
      
      This patch refactors f2fs_convert_inline_data to check a couple of conditions
      internally for deciding whether it needs to convert inline_data or not.
      
      So, the new f2fs_convert_inline_data initially checks:
      1) f2fs_has_inline_data(), and
      2) the data size to be changed.
      
      If the inode has inline_data but the size to fill is less than MAX_INLINE_DATA,
      then we don't need to convert the inline_data with data allocation.
      Signed-off-by: NJaegeuk Kim <jaegeuk.kim@samsung.com>
      9e09fc85
  4. 26 12月, 2013 3 次提交
  5. 23 12月, 2013 23 次提交
  6. 08 11月, 2013 1 次提交
  7. 31 10月, 2013 1 次提交
  8. 29 10月, 2013 1 次提交
  9. 25 10月, 2013 4 次提交