Hello Christoph,
from my experience I can tell that it's a matter of ram memory
fragmentation.
uClinux doesn't defragment the ram memory, so the real free memory is
less then the one shown in cat /proc/meminfo!!!
I have an identical problem on a Coldfire! I asked to upgrade the ram
memory in order to avoid this problems...
Hope this can help you!
Regards,
Alessandro
Christoph Baumann ha scritto:
Hello all,
working on an application for an ARM target (no MMU!) with uClinux I ran
into a strange problem. When I try to allocate 4MB of RAM the allocation
fails. If I then try to allocate 4MB minus 4k (one page) it works. But
then no other application can allocate memory until the first
application either frees its memory again or gets killed by the kernel
to make more RAM available. /proc/meminfo shows that there are ~10MB of
free RAM.
Meanwhile I checked the value of MAX_ORDER which is set to 13.
So any ideas out there?
Thanks and Regards,
Christoph
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