f2fs: introduce migration_window_granularity
We can control the scanning window granularity for GC migration. For more frequent scanning and GC on zoned devices, we need a fine grained control knob for it. Signed-off-by:Daeho Jeong <daehojeong@google.com> Reviewed-by:
Chao Yu <chao@kernel.org> Signed-off-by:
Jaegeuk Kim <jaegeuk@kernel.org>
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