How can I find what is occupying my low memory on 32 bit Linux OS?
cat /proc/meminfo |grep Low LowTotal: 812908 kB LowFree: 43340 kB
Low memory (aka ZONE_NORMAL) is all kernelspace. It will be for things like kernel modules, buffers for your network and storage devices, filesystems, and pagecache.
You can cat /proc/slabinfo to see detailed usage.