On Wed, 13 Oct 2010 09:01:43 +0200 Andi Kleen <andi@xxxxxxxxxxxxxx> wrote: > KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> writes: > > > > What this wants to do: > > allocates a contiguous chunk of pages larger than MAX_ORDER. > > for device drivers (camera? etc..) > > I think to really move forward you need a concrete use case > actually implemented in tree. > yes. I heard there were users at LinuxCon Japan, so restarted. I heared video-for-linux + ARM wants this. I found this thread, now. http://kerneltrap.org/mailarchive/linux-kernel/2010/10/10/4630166 Hmm. > > My intention is not for allocating HUGEPAGE(> MAX_ORDER). > > I still believe using this for 1GB pages would be one of the more > interesting use cases. > I'm successfully allocating 1GB of continous pages at test. But I'm not sure requirements and users. How quick this allocation should be ? For example, if prep_new_page() for 1GB page is slow, what kind of chunk-of-page construction is the best. 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>