• Matias Bjørling's avatar
    lightnvm: move bad block and chunk state logic to core · aff3fb18
    Matias Bjørling authored
    pblk implements two data paths for recovery line state. One for 1.2
    and another for 2.0, instead of having pblk implement these, combine
    them in the core to reduce complexity and make available to other
    targets.
    
    The new interface will adhere to the 2.0 chunk definition,
    including managing open chunks with an active write pointer. To provide
    this interface, a 1.2 device recovers the state of the chunks by
    manually detecting if a chunk is either free/open/close/offline, and if
    open, scanning the flash pages sequentially to find the next writeable
    page. This process takes on average ~10 seconds on a device with 64 dies,
    1024 blocks and 60us read access time. The process can be parallelized
    but is left out for maintenance simplicity, as the 1.2 specification is
    deprecated. For 2.0 devices, the logic is maintained internally in the
    drive and retrieved through the 2.0 interface.
    Signed-off-by: default avatarMatias Bjørling <mb@lightnvm.io>
    Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
    aff3fb18
lightnvm.c 33 KB