On Tue, Nov 18, 2014 at 07:11:04PM +0000, Russell King - ARM Linux wrote: > On Tue, Nov 18, 2014 at 06:14:12PM +0000, Catalin Marinas wrote: > > Actually, with LPAE you can save a pmd and pte allocated for the vectors > > page at 0xffff0000. So you can save 8K per task here. Similarly with the > > classic MMU, you can save another 4K for the vectors page pte. > > No. For any CPU which has high vectors (approximately ARMv5 and up), > there is no "vectors page pte". The vectors page PTE is only allocated > when we need low vectors.
You are right. The kernel pgd entries are copied by pgd_alloc, so no need for additional pmd/pte allocations (they would be shared). -- Catalin -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
