ll /sys/devices/LNXSYSTM:00/device:00/ACPI0012:00/ndbus0/region1/pfn1.1/block/pmem1/
total 0
-r--r--r-- 1 root root 4096 Apr 19 09:38 alignment_offset
-rw-r--r-- 1 root root 4096 Apr 19 09:38 badblocks
lrwxrwxrwx 1 root root 0 Apr 19 09:38 bdi -> ../../../../../../../../virtual/bdi/259:3
-r--r--r-- 1 root root 4096 Apr 19 09:38 capability
drwxr-xr-x 2 root root 0 Apr 19 09:38 dax
-r--r--r-- 1 root root 4096 Apr 19 09:38 dev
lrwxrwxrwx 1 root root 0 Apr 19 09:38 device -> ../../../pfn1.1
-r--r--r-- 1 root root 4096 Apr 19 09:38 discard_alignment
-r--r--r-- 1 root root 4096 Apr 19 09:38 ext_range
drwxr-xr-x 2 root root 0 Apr 19 09:38 holders
-r--r--r-- 1 root root 4096 Apr 19 09:38 inflight
drwxr-xr-x 2 root root 0 Apr 19 09:38 power
drwxr-xr-x 2 root root 0 Apr 19 09:38 queue
-r--r--r-- 1 root root 4096 Apr 19 09:38 range
-r--r--r-- 1 root root 4096 Apr 19 09:38 removable
-r--r--r-- 1 root root 4096 Apr 19 09:38 ro
-r--r--r-- 1 root root 4096 Apr 19 09:38 size
drwxr-xr-x 2 root root 0 Apr 19 09:38 slaves
-r--r--r-- 1 root root 4096 Apr 19 09:38 stat
lrwxrwxrwx 1 root root 0 Apr 19 09:38 subsystem -> ../../../../../../../../../class/block
drwxr-xr-x 2 root root 0 Apr 19 09:38 trace
-rw-r--r-- 1 root root 4096 Apr 19 09:38 uevent
On Wed, Apr 24, 2019 at 11:53 AM Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
On Wed, Apr 24, 2019 at 10:10:08AM -0700, Sayeed hyder wrote:
> Forgot to hit "reply all"
>
> On Wed, Apr 24, 2019 at 9:52 AM Sayeed hyder <csayeedh@xxxxxxxxx> wrote:
>
> > Hi Greg,
> >
> > Sure, this is what I get if I use the syspath from
> > udev_device_get_syspath. As you can see, it is showing a symlink to a
> > device, and there is no driver. If it helps, it is a DAX mounted persistent
> > memory device.
> >
> > [image: image.png]
Sorry, can't see images from a text email client :(
Anyway, if this is a DAX device, are you _SURE_ you are dealing with a
real device that is controlled by a driver, and not just a class device?
Class devices do not have drivers. How is the DAX device being exposed
to userspace?
Can you provide a text version of your image? It's just sysfs, which is
text...
thanks,
greg k-h
_______________________________________________ systemd-devel mailing list systemd-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/systemd-devel
