Re: [RFC] mm: Change the data type of huge page size from unsigned long to u64

From: Kirill A. Shutemov
Date: Tue Sep 13 2016 - 05:33:07 EST

On Tue, Sep 13, 2016 at 05:26:05PM +0800, Rui Teng wrote:
> The huge page size could be 16G(0x400000000) on ppc64 architecture, and it will
> cause an overflow on unsigned long data type(0xFFFFFFFF).

Huh? ppc64 is 64-bit system and sizeof(void *) is equal to
sizeof(unsigned long) on Linux (LP64 model).

So where your 0xFFFFFFFF comes from?

Kirill A. Shutemov