On Fri, Jun 14, 2002 at 12:44:03PM -0400, Dan Malek wrote: [snip] > The newer ARM version only allocates the number of pages necessary to > cover the request. The old version, and the one in PowerPC right now, > would just use __get_free_pages, which was a power-of-two allocator. > You could end up wasting lots of memory if you weren't allocating power of > two sized buffers. There were a couple of implementation iterations > to make this work, and I guess this is where ARM ended up. I think > one version really wanted that page struct, but now it doesn't really > matter.
I ended up noticing that myself, and have things almost right, I think (patch shortly, if so..) > >.... Dan? Can we get some more insight > >into the workings of your mind? :) > > I've been watching the ARM updates and plan to move their changes into > the PowerPC sources. I don't know why they don't call vfree() directly, > I thought it did the proper clean up. I'm not sure either. __iounmap on ARM just is vfree() with the casts. -- Tom Rini (TR1265) http://gate.crashing.org/~trini/ ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
