UBI memory usage on large page nand

[Nicholas]

Hi there,

I've a short of memory usage issue while using large page size of nand flash.
Before, i was using 2KB page size of nand flash, i found UBI/UBIFS memory
consumption on normal zone are :

7 0xC0180858:   1024K, ubi_attach_mtd_de,
8 0xC0180834:   1024K, ubi_attach_mtd_de,
9 0xC00ED300:   1008K,      ubifs_get_sb,
10 0xC00ED31C:   1008K,      ubifs_get_sb,
11 0xC00FE7EC:   1008K,    ubifs_lpt_init,
11 0xC00F95AC:   1008K, ubifs_mount_orpha,

Then, i'm using 8KB page size of nand flash, and found the result as below :
4 0xC0180858:   4096K, ubi_attach_mtd_de,
5 0xC0180834:   4096K, ubi_attach_mtd_de,
6 0xC00FE7EC:   4064K,    ubifs_lpt_init,
7 0xC00ED31C:   4064K,      ubifs_get_sb,
8 0xC00F95AC:   4064K, ubifs_mount_orpha,
9 0xC00ED300:   4064K,      ubifs_get_sb,

My environment contains 2 mtd partitions for UBI.

Before, it took 6MB of memory consumption and now it takes 24MB.
Do you have any suggestion how to reduce the memory consumption since dram size
is pretty limited for other usage.

Thank you,
Alex