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This was a premature optimization from the early days of SerenityOS.
The eternal heap was a simple bump pointer allocator over a static
byte array. My original idea was to avoid heap fragmentation and improve
data locality, but both ideas were rooted in cargo culting, not data.
We would reserve 4 MiB at boot and only ended up using ~256 KiB, wasting
the rest.
This patch replaces all kmalloc_eternal() usage by regular kmalloc().
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... In files included from Kernel/Process.cpp and Kernel/Thread.cpp
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This makes the user-facing type only take the node member pointer, and
lets the compiler figure out the other needed types from that.
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This directory isn't just about virtual memory, it's about all kinds
of memory management.
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