On Thu, 26 Aug 2010 11:50:17 +0900 KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> wrote: > 128MB...too big ? But it's depend on config. > > IBM's ppc guys used 16MB section, and recently, a new interface to shrink > the number of /sys files are added, maybe usable. > > Something good with this approach will be you can create "cma" memory > before installing driver. > > But yes, complicated and need some works. > Ah, I need to clarify what I want to say. With compaction, it's helpful, but you can't get contiguous memory larger than MAX_ORDER, I think. To get memory larger than MAX_ORDER on demand, memory hot-plug code has almost all necessary things. you may able to add # echo 0xa0000000-0xa80000000 > /sys/devices/system/memory/cma to get contiguous isolated memory. BTW, just curious...the memory for cma need not to be saved at hibernation ? Or drivers has to write its own hibernation ops by driver suspend udev or some ? Thanks, -Kame -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>