On Tue, Jun 23, 2026 at 06:17:36AM -0400, Zhenzhong Duan wrote:
> + spin_lock_irqsave(&unaccepted_memory_lock, flags);
> + for (; range_start < bitmap_size; range_start = range_end) {
> + unsigned long phys_start, phys_end;
> + unsigned long unaccepted_one, plugged_zero;
> +
> + range_start = find_next_andnot_bit(plugged_bitmap,
> unaccepted->bitmap,
> + bitmap_size, range_start);
> +
> + if (range_start >= bitmap_size)
> + break;
> +
> + unaccepted_one = find_next_bit(unaccepted->bitmap, bitmap_size,
> range_start);
> + plugged_zero = find_next_zero_bit(plugged_bitmap, bitmap_size,
> range_start);
> + range_end = min(unaccepted_one, plugged_zero);
> +
> + phys_start = range_start * unit_size + unaccepted->phys_base;
> + phys_end = range_end * unit_size + unaccepted->phys_base;
> +
> + arch_unaccept_memory(phys_start, phys_end);
> + bitmap_set(unaccepted->bitmap, range_start, range_end -
> range_start);
> + }
> + spin_unlock_irqrestore(&unaccepted_memory_lock, flags);
Accept TDCALL under the spin lock will kill scalability.
--
Kiryl Shutsemau / Kirill A. Shutemov
