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Kernel: Remove the kmalloc_eternal heap :^)

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().
This commit is contained in:
Andreas Kling 2021-12-28 19:12:22 +01:00
parent a1be135891
commit ac7ce12123
46 changed files with 5 additions and 82 deletions

View file

@ -39,14 +39,12 @@ enum class align_val_t : size_t {};
};
void kmalloc_init();
[[gnu::malloc, gnu::returns_nonnull, gnu::alloc_size(1)]] void* kmalloc_eternal(size_t);
void kfree_sized(void*, size_t);
struct kmalloc_stats {
size_t bytes_allocated;
size_t bytes_free;
size_t bytes_eternal;
size_t kmalloc_call_count;
size_t kfree_call_count;
};