On Tue, Mar 04, 2014 at 03:00:45PM +0100, Paolo Bonzini wrote:
Like the previous patch did in exec.c, split memory_region_init_ram and
memory_region_init_ram_from_file, and push mem_path one step further up.
Other RAM regions than system memory will now be backed by regular RAM.
This changes qemu's behaviour regarding using hugetlbfs, especially when
size of other RAM regions is significant compared to system memory. Will
this a problem?(compatibilities, user configurations...)
Also, boards that do not use memory_region_allocate_system_memory will
not support -mem-path anymore. This can be changed before the patches
are merged by migrating boards to use the function.
IIUC, memory_region_allocate_system_memory() is only called once at
board initialization time. In most cases, it just works. But there
are cases that system memory is not initialized by a single call to
memory_region_allocate_system_memory() that total memory is splitted
into banks each of which is initialized individually, see
ppc4xx_sdram_adjust(). How to convert to
memory_region_allocate_system_memory() in this case? Should we map
banks into numa nodes?