[dm-devel] dm-thin

[lilofile]

In dm-thin.c,
/*
 * The block size of the device holding pool data must be
 * between 64KB and 1GB.
 */
#define DATA_DEV_BLOCK_SIZE_MIN_SECTORS (64 * 1024 >> SECTOR_SHIFT)
#define DATA_DEV_BLOCK_SIZE_MAX_SECTORS (1024 * 1024 * 1024 >> SECTOR_SHIFT)

why the block size must be between 64KB and 1GB, can I change  the value of DATA_DEV_BLOCK_SIZE_MIN_SECTORS? what effect  if the value of DATA_DEV_BLOCK_SIZE_MIN_SECTORS<128?