osStackFree(s)
				mheap_.freeManual(s, spanAllocStack)
			}
			s = next
		}
		unlock(&stackpool[order].item.mu)
	}

	// Free large stack spans.
	lock(&stackLarge.lock)
	for i := range stackLarge.free {
		for s := stackLarge.free[i].first; s != nil; {
			next := s.next
			stackLarge.free[i].remove(s)
			osStackFree(s)
			mheap_.freeManual(s, spanAllocStack)
			s = next
		}

		gp := getg().m.curg
		for i := 0; i < batchSize && !(preemptible && gp.preempt); i++ {
			span := work.wbufSpans.free.first
			if span == nil {
				break
			}
			work.wbufSpans.free.remove(span)
			mheap_.freeManual(span, spanAllocWorkBuf)
		}
	})
	more := !work.wbufSpans.free.isEmpty()
	unlock(&work.wbufSpans.lock)
	return more

				// The unrolled GCProg bitmap is allocated separately.
				// Free the space for the unrolled bitmap.
				systemstack(func() {
					s := spanOf(uintptr(unsafe.Pointer(s.largeType)))
					mheap_.freeManual(s, spanAllocPtrScalarBits)
				})
				// Make sure to zero this pointer without putting the old
				// value in a write buffer, as the old value might be an
				// invalid pointer. See arena.go:(*mheap).allocUserArenaChunk.