On Thu, Nov 4, 2021 at 9:04 AM Christoph Hellwig <[email protected]> wrote:
>
> On Thu, Nov 04, 2021 at 09:00:01AM -0700, Dan Williams wrote:
> > > Any idea what might be missing in the attached config? This seems to
> > > be independent of the tested kernel version (5.14, 5.15, master).
> >
> > Can you share your qemu command line
>
> qemu-system-x86_64 -enable-kvm \
> -machine pc,nvdimm=on \
> -m 4096,slots=8,maxmem=32G \
> -smp 4 \
> -kernel arch/x86/boot/bzImage \
> -append "root=/dev/vda1 console=ttyS0,115200n8" \
> -nographic \
> -drive if=virtio,file=/home/hch/images/jessie.img,cache=none \
> -object
> memory-backend-file,id=mem0,mem-path=/home/hch/images/test.img,share=yes,prealloc=no,align=128M,size=10G
> \
> -device nvdimm,id=nvdimm0,memdev=mem0,slot=0,label-size=2M \
> -object
> memory-backend-file,id=mem1,mem-path=/home/hch/images/scratch.img,share=yes,prealloc=no,align=128M,size=10G
> \
> -device nvdimm,id=nvdimm1,memdev=mem1,slot=1,label-size=2M \
>
>
> > and the output of:
> >
> > ndctl list -vvv
>
>
> [
> {
> "provider":"ACPI.NFIT",
> "dev":"ndbus0",
> "dimms":[
> {
> "dev":"nmem1",
> "id":"8680-57341200",
> "handle":2,
> "phys_id":0
> },
> {
> "dev":"nmem0",
> "id":"8680-56341200",
> "handle":1,
> "phys_id":0
> }
> ],
> "regions":[
> {
> "dev":"region1",
> "size":10603200512,
> "available_size":10603200512,
Hmm, so the driver has 2 modes "labeled" and "label-less", in the
labeled mode it waits for an explicit:
ndctl create-namespace
...to provision region capacity into a namespace. In label-less mode
it just assumes that the boundaries of the region are the boundaries
of the namespace. In this case it looks like the driver found a label
index block with no namespaces defined so it's waiting for one to be
created. Are you saying that the only thing you changed from a working
config with defined namespace to this one was a kernel change? I.e.
the content of those memory-backend files has not changed?
> "max_available_extent":10603200512,
> "type":"pmem",
> "iset_id":52512795602891997,
> "mappings":[
> {
> "dimm":"nmem1",
> "offset":0,
> "length":10603200512,
> "position":0
> }
> ],
> "persistence_domain":"unknown",
> "namespaces":[
> {
> "dev":"namespace1.0",
> "mode":"raw",
> "size":0,
> "uuid":"00000000-0000-0000-0000-000000000000",
> "sector_size":512,
> "state":"disabled"
> }
> ]
> },
> {
> "dev":"region0",
> "size":10603200512,
> "available_size":10603200512,
> "max_available_extent":10603200512,
> "type":"pmem",
> "iset_id":52512752653219036,
> "mappings":[
> {
> "dimm":"nmem0",
> "offset":0,
> "length":10603200512,
> "position":0
> }
> ],
> "persistence_domain":"unknown",
> "namespaces":[
> {
> "dev":"namespace0.0",
> "mode":"raw",
> "size":0,
> "uuid":"00000000-0000-0000-0000-000000000000",
> "sector_size":512,
> "state":"disabled"
> }
> ]
> }
> ]
> }
> ]
