On Wed, Jun 02, 2010 at 01:10:17AM -0700, Anoop P.A. wrote: > >From the datasheets and design discussion it looks like prefix has been > designed to be static i.e they are expecting all buffers to get > allocated with same prefix. In another words all the buffers should be > below < 0x1fff_ffff ( physical address) or between 0x2000_0000 and > 0x3fff_ffff like that. > > Is there any way to force kmalloc to allocate memory in certain region > or below some region? Nothing that would uniformly work for 32-bit and 64-bit kernels and also Linux only has flags that allocate below certain addresses; nothing that tells the allocator "give me something between 0x20000000 and 0x3fffffff". Ralf