On Tue, Jan 13, 2015 at 12:36:23PM -0800, Dave Hansen wrote: > On 01/13/2015 11:14 AM, Kirill A. Shutemov wrote: > > pgd_t * pgd; > > atomic_t mm_users; /* How many users with user space? */ > > atomic_t mm_count; /* How many references to "struct mm_struct" (users count as 1) */ > > - atomic_long_t nr_ptes; /* Page table pages */ > > + atomic_long_t nr_pgtables; /* Page table pages */ > > int map_count; /* number of VMAs */ > > One more crazy idea... > > There are 2^9 possible pud pages, 2^18 pmd pages and 2^27 pte pages. > That's only 54 bits (technically minus one bit each because the upper > half of the address space is for the kernel). Does this math make sense for all architecures? IA64? Power? -- 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>