At the Start of Booting: Memory tight

This means that you have an extra-large kernel, which means that Linux
has to do some special memory-management magic to be able to boot
itself from the BIOS. It isn't related to the amount of physical
memory in your machine. Ignore the message, or compile a kernel
containing only the drivers and features you need. ("How To
Upgrade/Recompile a Kernel.")
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