On 08/04/2016 10:37 PM, Dan Williams wrote:
On Thu, Aug 4, 2016 at 2:15 AM, Yi Zhang <[email protected]> wrote:
Hi folks,
Seems I hit one issue that btt device node disappeared after configure with non
support sector_size, could you help confirm it?
4.7.0
# ndctl create-namespace -f -e namespace0.0 --mode=sector -l 512
{
"dev":"namespace0.0",
"mode":"sector",
"uuid":"45b4900d-da76-47c8-956f-a70e4ea33fe3",
"sector_size":512,
"blockdev":"pmem0s"
}
# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
pmem0s 259:0 0 8G 0 disk
pmem1s 259:2 0 7.1G 0 disk
pmem2s 259:1 0 7.1G 0 disk
pmem3s 259:3 0 7.1G 0 disk
# ndctl create-namespace -f -e namespace0.0 --mode=sector -l 513
failed to reconfigure namespace
# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
pmem1s 259:2 0 7.1G 0 disk
pmem2s 259:1 0 7.1G 0 disk
pmem3s 259:3 0 7.1G 0 disk
This is expected if you specify invalid namespace values, but we
should be trapping this case and reporting a more useful error message
from ndctl rather than letting the kernel fail the namespace setup.
For now, you can fix this by re-configuring the namespace with valid values.
yes, I have re-configured with valid sector size and the pmem0s
reconfigured.
I think it's better to let the pmem0s device node still exist and can be
used rather than fail the kernel setup. :)
Thanks
Yi
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