Re: [PATCH] ndctl: daxctl: Adding io option for daxctl
Dan Williams <dan.j.williams(a)intel.com> writes:
On Fri, Jun 16, 2017 at 10:00 AM, Jeff Moyer
<jmoyer(a)redhat.com> wrote:
> Dave Jiang <dave.jiang(a)intel.com> writes:
>
>> The daxctl io option allows I/Os to be performed between block/file to
>> and from device dax files. It also provides a way to zero a device dax
>> device.
>>
>> i.e. daxctl io --input=/home/myfile --output=/dev/dax1.0
>
> Does that really belong in daxctl?
I'm open to teaching other utilities how to do mmap based i/o, but is
there any harm in carrying this dedicated utility for this purpose?
Well, what is the purpose of daxctl, exactly? Given the 'ctl' in the
name, I figured it was used for configuration.
Certainly the error clearing interface to send custom nvdimm ioctls
is
not something I expect 'cp' or 'dd' to comprehend.
Sure, clearing errors makes sense. I don't see a need to reimplement dd
or xfs_io, though.
Cheers,
Jeff