f2fs: apply write hints to select the type of segments for buffered write

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Write hints helps F2FS to determine which type of segments would be
selected for buffered write.

This patch implements the mapping from write hints to segment types
as shown below.

  hints               segment type
  -----               ------------
  WRITE_LIFE_SHORT    CURSEG_HOT_DATA
  WRITE_LIFE_EXTREME  CURSEG_COLD_DATA
  others              CURSEG_WARM_DATA

the F2FS poliy for hot/cold seperation has precedence over this hints.
And hints are not applied in in-place update.

Signed-off-by: Hyunchul Lee <cheol.lee@lge.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

...

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Hyunchul Lee 2017-11-09 14:51:27 +09:00 • committed by Jaegeuk Kim

parent 2fbaa25fde

commit 4f0a03d34d

1 changed files with 13 additions and 1 deletions

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fs/f2fs/segment.c

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