On Thu, 14 Oct 2010 09:24:21 +0200 Andi Kleen <andi@xxxxxxxxxxxxxx> wrote: > On Thu, Oct 14, 2010 at 04:07:12PM +0900, FUJITA Tomonori wrote: > > 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. > > > > As already pointed out, some embeded drivers need physcailly > > contignous memory. Currenlty, they use hacky tricks (e.g. playing with > > the boot memory allocators). There are several proposals for this like > > Are any of those in mainline? The tricks or the proposals? I think that at least one mainline driver in arm uses such trick but I can't recall the name. Better to ask on the arm mainling list. Also I heard that the are some out-of-tree patches about this. I think that any such proposal hasn't merged yet. If you are looking for such examples, here's one: http://lwn.net/Articles/401107/ -- 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>