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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

@ -38,17 +38,6 @@ inline size_t malloc_good_size(size_t size) { return size; }
# endif
#endif
#ifdef KERNEL
# define AK_MAKE_ETERNAL \
public: \
void* operator new(size_t size) { return kmalloc_eternal(size); } \
void operator delete(void*, size_t) { VERIFY_NOT_REACHED(); } \
\
private:
#else
# define AK_MAKE_ETERNAL
#endif
using std::nothrow;
inline void* kmalloc_array(Checked<size_t> a, Checked<size_t> b)