Re: [PATCH] exec: fetch the alignment of Linux devdax pmem character device nodes

[Liu, Jingqi]

On 4/7/2020 11:51 PM, Joao Martins wrote:
> On 4/7/20 3:31 PM, Paolo Bonzini wrote:
> > On 07/04/20 12:59, Joao Martins wrote:
> > > Perhaps, you meant instead:
> > >
> > >         /sys/dev/char/%d:%d/align
> > >
> > >   ?
Hi Joao,

In my machine with real NVDIMM, the devdax device is as follows:

$ ll /dev/dax0.0
crw------- 1 root root 250, 6 3月  25 15:16 /dev/dax0.0

$ ls /sys/dev/char/250\:6/align
ls: cannot access '/sys/dev/char/250:6/align': No such file or directory

$ ls /sys/dev/char/250\:6/device/align

/sys/dev/char/250:6/device/align

So:
The file of "/sys/dev/char/%d:%d/align" does not exist.
It should be "/sys/dev/char/%d:%d/device/align".

Anyone has a real NVDIMM can help double check. Thanks.

Hi Dan,

You may have a real NVDIMM, in what directory is the 'align' file ?

Thanks,

Jingqi

> > So it works with that change?
> Yeah.
>
>         Joao