Devices with SMALL_FLASH enabled have "SQUASHFS_BLOCK_SIZE=1024" in
their config. This significantly increases the cache memory required by
squashfs [0]. This commit enables low_mem leading to a much better
performance because the SQUASHFS_BLOCK_SIZE is reduced to 256.
Example Nanostation M5 (XM):
The image size increases by 128 KiB. However, the memory statisitcs look
much better:
Default tiny build:
------
MemTotal: 26020 kB
MemFree: 5648 kB
MemAvailable: 6112 kB
Buffers: 0 kB
Cached: 3044 kB
low_mem enabled:
-----
MemTotal: 26976 kB
MemFree: 6748 kB
MemAvailable: 11504 kB
Buffers: 0 kB
Cached: 7204 kB
[0] - 7e8af99cf5
Signed-off-by: Nick Hainke <vincent@systemli.org>
f54ac98f8c