On Wed, Aug 14, 2013 at 2:52 PM, Seth Jennings <sjenning@xxxxxxxxxxxxxxxxxx> wrote: > On Wed, Aug 14, 2013 at 02:37:26PM -0700, Yinghai Lu wrote: > If I am understanding you correctly, you are suggesting we make the block size > a boot time tunable. It can't be a runtime tunable since the memory blocks are > currently created a boot time. yes. If could make it to be tunable at run-time, could be much better. > > On ppc64, we can't just just choose a memory block size since it must align > with the underlying LMB (logical memory block) size, set in the hardware ahead > of time. assume for x86_64, it now support 46bits physical address. so if we change to 2G, then big system will only need create (1<<15) aka 32k entries in /sys at most. Thanks Yinghai -- 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>