On Fri, Jul 24, 2015 at 05:28:43PM -0400, Eric B Munson wrote: > The cost of faulting in all memory to be locked can be very high when > working with large mappings. If only portions of the mapping will be > used this can incur a high penalty for locking. > > Now that we have the new VMA flag for the locked but not present state, > expose it as an mmap option like MAP_LOCKED -> VM_LOCKED.
As I mentioned before, I don't think this interface is justified. MAP_LOCKED has known issues[1]. The MAP_LOCKED problem is not necessary affects MAP_LOCKONFAULT, but still. Let's not add new interface unless it's demonstrably useful. [1] http://lkml.kernel.org/g/20150114095019.gc4...@dhcp22.suse.cz -- Kirill A. Shutemov -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
