On Tue, Feb 4, 2020 at 7:30 AM Barret Rhoden <brho@xxxxxxxxxx> wrote: > > Hi - > > On 1/10/20 2:03 PM, Joao Martins wrote: > > User can define regions with 'memmap=size!offset' which in turn > > creates PMEM legacy devices. But because it is a label-less > > NVDIMM device we only have one namespace for the whole device. > > > > Add support for multiple namespaces by adding ndctl control > > support, and exposing a minimal set of features: > > (ND_CMD_GET_CONFIG_SIZE, ND_CMD_GET_CONFIG_DATA, > > ND_CMD_SET_CONFIG_DATA) alongside NDD_ALIASING because we can > > store labels. > > FWIW, I like this a lot. If we move away from using memmap in favor of > efi_fake_mem, ideally we'd have the same support for full-fledged > pmem/dax regions and namespaces that this patch brings. No, efi_fake_mem only supports creating dax-regions. What's the use case that can't be satisfied by just specifying multiple memmap= ranges?
