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std.heap.SmpAllocator; fix freelist accounting

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This commit is contained in:
Andrew Kelley 2025-02-08 15:07:03 -08:00
parent ea1ce2df9b
commit bb5a4036e8
1 changed files with 2 additions and 1 deletions
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3
lib/std/heap/SmpAllocator.zig
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@ -53,7 +53,7 @@ const min_class = math.log2(@sizeOf(usize));
const size_class_count = math.log2(slab_len) - min_class;
/// When a freelist length exceeds this number, a `free` will rotate up to
/// `max_free_search` times before pushing.
const max_freelist_len: u8 = 16;
const max_freelist_len: u8 = 255;
const max_free_search = 1;
/// Before mapping a fresh page, `alloc` will rotate this many times.
const max_alloc_search = 1;
@ -223,6 +223,7 @@ fn free(context: *anyopaque, memory: []u8, alignment: mem.Alignment, ra: usize)
if (freelist_len < max_freelist_len) {
@branchHint(.likely);
defer t.unlock();
t.freelist_lens[class] = freelist_len +| 1;
node.* = t.frees[class];
t.frees[class] = @intFromPtr(node);
return;