• Yinghai Lu's avatar
    swiotlb: Use page alignment for early buffer allocation · e79f86b2
    Yinghai Lu authored
    We could call free_bootmem_late() if swiotlb is not used, and
    it will shrink to page alignment.
    
    So alloc them with page alignment at first, to avoid lose two pages
    
    before patch:
    [    0.000000]     memblock_x86_reserve_range: [00d3600000, 00d7600000]   swiotlb buffer
    [    0.000000]     memblock_x86_reserve_range: [00d7e7ef40, 00d7e9ef40]     swiotlb list
    [    0.000000]     memblock_x86_reserve_range: [00d7e3ef40, 00d7e7ef40]  swiotlb orig_ad
    [    0.000000]     memblock_x86_reserve_range: [000008a000, 0000092000]  swiotlb overflo
    
    after patch will get
    [    0.000000]     memblock_x86_reserve_range: [00d3600000, 00d7600000]   swiotlb buffer
    [    0.000000]     memblock_x86_reserve_range: [00d7e7e000, 00d7e9e000]     swiotlb list
    [    0.000000]     memblock_x86_reserve_range: [00d7e3e000, 00d7e7e000]  swiotlb orig_ad
    [    0.000000]     memblock_x86_reserve_range: [000008a000, 0000092000]  swiotlb overflo
    Signed-off-by: default avatarYinghai Lu <yinghai@kernel.org>
    Acked-by: default avatarFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
    Cc: Becky Bruce <beckyb@kernel.crashing.org>
    Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
    e79f86b2
swiotlb.c 25.5 KB