On Wed, Jan 17, 2018 at 11:54:18AM +0200, Marcel Apfelbaum wrote: > Currently only file backed memory backend can > be created with a "share" flag in order to allow > sharing guest RAM with other processes in the host. > > Add the "share" flag also to RAM Memory Backend > in order to allow remapping parts of the guest RAM > to different host virtual addresses. This is needed > by the RDMA devices in order to remap non-contiguous > QEMU virtual addresses to a contiguous virtual address range. >
Why do we need to make this configurable? Would anything break if MAP_SHARED was always used if possible? > Moved the "share" flag to the Host Memory base class, > modified phys_mem_alloc to include the new parameter > and a new interface memory_region_init_ram_shared_nomigrate. > > There are no functional changes if the new flag is not used. > > Signed-off-by: Marcel Apfelbaum <mar...@redhat.com> [...] -- Eduardo