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[Zion] Free memory that was allocated with the slab allocator.

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This reduces the number of active allocs by ~ 200.
Size 8: 142 -> 2
Size 16: 319 > 313
Size 32: 364-> 312
This commit is contained in:
Drew Galbraith 2023-11-15 12:53:14 -08:00
parent 6d27ee5dc5
commit 659f122c9e
6 changed files with 50 additions and 15 deletions
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17
zion/memory/slab_allocator.cpp
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@ -1,21 +1,24 @@
#include "slab_allocator.h"
#include "debug/debug.h"
#include "memory/constants.h"
#include "memory/paging_util.h"
namespace {
// TODO: Store these in a kernel VMM.
const uint64_t kSlabSize = 0x1000;
uint64_t gNextSlab = 0xFFFFFFFF'40000000;
const uint64_t gMaxSlab = 0xFFFF'FFFF'6000'0000;
const uint64_t kSlabSize = 4 * KiB;
const uint64_t kSlabMask = ~(kSlabSize - 1);
uint64_t gNextSlab = kKernelSlabHeapStart;
uint64_t NextSlab() {
// FIXME: Synchronization.
uint64_t next_slab = gNextSlab;
if (next_slab >= kKernelBuddyHeapEnd) {
panic("Slab heap overrun");
}
gNextSlab += kSlabSize;
EnsureResident(next_slab, 1);
return next_slab;
}
@ -113,3 +116,9 @@ uint64_t SlabAllocator::Allocations() {
}
return count;
}
void SlabFree(void* addr) {
Slab* slab =
reinterpret_cast<Slab*>(reinterpret_cast<uint64_t>(addr) & kSlabMask);
slab->Free(addr);
}