On Tue, Sep 13, 2016 at 07:21:07PM +0800, Rui Teng wrote: > On 9/13/16 5:32 PM, Kirill A. Shutemov wrote: > >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? > > > The size of unsigned long data type is 4 bytes No, it's not. -- Kirill A. Shutemov -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>