Environment:
===========================================
Processor: ARM926EJ
Memory :
RAM : 20MB (Total 32M, but 12MB is used for HW)
FLASH: 8M. (Used ratio: 90%)
Kernel:2.6.14 (arm)
LIB: uclibc

MyApplication: (named myapp)
============================================
$>cat /proc/meminfo

MemTotal: 18404 kB
MemFree: 1332 kB
Buffers: 84 kB
Cached: 7788 kB
SwapCached: 0 kB
Active: 10320 kB
Inactive: 1384 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 18404 kB
LowFree: 1332 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 0 kB
Writeback: 0 kB
Mapped: 7352 kB
Slab: 2176 kB
CommitLimit: 9200 kB
Committed_AS: 13440 kB
PageTables: 256 kB
VmallocTotal: 237568 kB
VmallocUsed: 15440 kB
VmallocChunk: 221564 kB
==========================================
My Question:

when myapp running , it will sometimes be KILLED.
one scene is the screen only display
** killed
the other scene is
** oom killed
in this scene, screen print the kernel's message.
the two KILLED scene had not generate CORE DUMP file.

it often happen when the meminfo shows the "MemFree " less then 800kb.

my system is always recording some information to the SD CARD, (VFAT filesystem).

****
Question:
1) Is it says that my system have NOT ENOUGH mem to run myapp?
2) Howto know how many memory the all system need? include the kernel.

Thanks!