• NeilBrown's avatar
    md/raid1: delay reads that could overtake behind-writes. · e555190d
    NeilBrown authored
    When a raid1 array is configured to support write-behind
    on some devices, it normally only reads from other devices.
    If all devices are write-behind (because the rest have failed)
    it is possible for a read request to be serviced before a
    behind-write request, which would appear as data corruption.
    
    So when forced to read from a WriteMostly device, wait for any
    write-behind to complete, and don't start any more behind-writes.
    Signed-off-by: default avatarNeilBrown <neilb@suse.de>
    e555190d
bitmap.h 9.89 KB