Not enough memory when entering CLI

Hi,

I am using Mellanox gPXE drivers which consume about 20MB of memory.

on some machines, when trying to enter CLI the drivers get stuck or even
reboot the machine.

How can we ensure the memory region reported by the BIOS are large enough to
fit Mellanox devices?
How can we ensure that umalloc command will fail when we ask for memory
region which is out of range?

Thanks,

Itay

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