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ke+mm: add TLB shootdown and memory reclamation.

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Loïc Grégoire
2026-06-25 21:33:14 -04:00
parent 20a38f3a49
commit 4ba57ad42a
19 changed files with 422 additions and 63 deletions
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src/mm/zone.zig
+7 -5
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@@ -20,8 +20,10 @@ const Slab = struct {
/// Reference count indicating how many objects are in use.
refcount: u16,
capacity: u16,
/// Base address of the slab.
/// Base address of the slab + its color.
base: usize,
/// Base address of the slab allocation.
buf: usize,
pub fn bitmap(self: *Slab) [*]u64 {
return @ptrFromInt(@intFromPtr(self) + @sizeOf(Slab));
@@ -623,6 +625,7 @@ pub const Zone = struct {
if (rem > 0) bm[full_words] = (@as(u64, 1) << @intCast(rem)) - 1;
ret.base = @intFromPtr(buf) + self.color;
ret.buf = @intFromPtr(buf);
ret.capacity = @intCast(capacity);
ret.refcount = 0;
@@ -667,7 +670,7 @@ pub const Zone = struct {
const alloc_size = @sizeOf(Slab) + Slab.bitmap_bytes(slab.capacity);
gpa.free(@as([*]u8, @ptrCast(slab))[0..alloc_size]);
// FIXME: call free_pages on slab.base here!
mm.heap.free(slab.buf, self.slab_size);
} else {
free_page(@ptrFromInt(std.mem.alignBackward(usize, @intFromPtr(slab), mm.page_size)));
}
@@ -842,9 +845,8 @@ fn gpa_free(
_: usize,
) void {
if (buf.len > 2048) {
//const pages = std.mem.alignForward(usize, buf.len, mm.page_size);
// TODO
//mi.heap.free_pages(@ptrCast(buf.ptr), pages);
const pages = std.mem.alignForward(usize, buf.len, mm.page_size);
mm.heap.free(@intFromPtr(buf.ptr), pages);
return;
}