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kboot: Move discovery of memory limits to main.c
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Authored by imp on Feb 1 2023, 6:23 AM.
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Details

Summary

main.c manages the kexec segments. Due to our inability to overcommit,
we need to know how much memory is available. commit_limit is the grand
total allowed. committed_as is the current memory used. mem_avail is
what Linux tells us is available. Find these from /proc/meminfo. We'll
use them later to allocate the biggest possible segment sizes, but for
now print the raw numbers.

Sponsored by: Netflix

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rG FreeBSD src repository
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Buildable 49382
Build 46272: arc lint + arc unit