• Martin Schwidefsky's avatar
    [S390] dynamic page tables. · 6252d702
    Martin Schwidefsky authored
    Add support for different number of page table levels dependent
    on the highest address used for a process. This will cause a 31 bit
    process to use a two level page table instead of the four level page
    table that is the default after the pud has been introduced. Likewise
    a normal 64 bit process will use three levels instead of four. Only
    if a process runs out of the 4 tera bytes which can be addressed with
    a three level page table the fourth level is dynamically added. Then
    the process can use up to 8 peta byte.
    Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>