Function fill_slots_from_block_table 

pub fn fill_slots_from_block_table(
    gpu: &dyn GpuBackend,
    kernel: KernelHandle,
    slots: DevicePtr,
    block_table: DevicePtr,
    start_pos: u32,
    count: u32,
    block_size: u32,
    stream: u64,
) -> Result<()>

Fill paged-KV slot mappings on-device from a persistent block table.

Kernel: fill_slots_from_block_table(slots, block_table, start_pos, count, block_size) Grid: (ceil(count/256), 1, 1) Block: (256, 1, 1)