• Ingo Molnar's avatar
    x86, mm: limit MAXMEM on 64-bit · b6fd6f26
    Ingo Molnar authored
    on 64-bit x86 the physical memory limit is controlled by the sparsemem
    bits - which are 44 bits right now. But MAXMEM (the max pfn number
    e820 parsing will allow to enter our sizing routines) is set to
    0x00003fffffffffff, i.e. 46 bits - that's too large because it overlaps
    into the vmalloc range.
    
    So couple MAXMEM to MAX_PHYSMEM_BITS, and add a comment that the
    maximum of MAX_PHYSMEM_BITS is 45 bits.
    Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
    b6fd6f26
pgtable_64.h 8.19 KB