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f2fs: add sysfs entries to select the gc policy

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Add sysfs entry gc_idle to control the gc policy. Where
gc_idle = 1 corresponds to selecting a cost benefit approach,
while gc_idle = 2 corresponds to selecting a greedy approach
to garbage collection. The selection is mutually exclusive one
approach will work at any point. If gc_idle = 0, then this
option is disabled.

Cc: Gu Zheng <[email protected]>
Signed-off-by: Namjae Jeon <[email protected]>
Signed-off-by: Pankaj Kumar <[email protected]>
Reviewed-by: Gu Zheng <[email protected]>
[Jaegeuk Kim: change the select_gc_type() flow slightly]
Signed-off-by: Jaegeuk Kim <[email protected]>
This commit is contained in:
Namjae Jeon 2013-08-04 23:10:15 +09:00 • committed by Jaegeuk Kim
commit d2dc095f42
5 changed files with 30 additions and 3 deletions
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6
Documentation/filesystems/f2fs.txt
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@ -158,6 +158,12 @@ Files in /sys/fs/f2fs/<devname>
time for the garbage collection thread. Time is
in milliseconds.
gc_idle This parameter controls the selection of victim
policy for garbage collection. Setting gc_idle = 0
(default) will disable this option. Setting
gc_idle = 1 will select the Cost Benefit approach
& setting gc_idle = 2 will select the greedy aproach.
================================================================================
USAGE
================================================================================