> On Tue, Nov 04 2014, Gregory Fong wrote: >> The alignment in cma_alloc() is done w.r.t. the bitmap. This is a >> problem when, for example: >> >> - a device requires 16M (order 12) alignment >> - the CMA region is not 16 M aligned
On Wed, Nov 05 2014, Weijie Yang wrote: > I think the device driver should ensure that situation could not occur, > by assign suitable alignment parameter in cma_declare_contiguous(). What about default CMA area? Besides, I think principle of least surprise applies here and alignment should be physical. -- Best regards, _ _ .o. | Liege of Serenely Enlightened Majesty of o' \,=./ `o ..o | Computer Science, Michał “mina86” Nazarewicz (o o) ooo +--<m...@google.com>--<xmpp:min...@jabber.org>--ooO--(_)--Ooo-- -- 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/
