remote devices

[Pranay Srivastava]

On Tue, Jun 3, 2014 at 7:42 AM, riya khanna <riyakhanna1983 at gmail.com> wrote:
> Hi Pranay,
>
> Thanks for pointing this out! I was wondering if it is possible to use
> a remote GPU through /dev/gpu.
>
You would need to modify the nfs client code i think for this. But
since it's a device file and if you don't have a fixed major number
that could be a problem since you wouldn't want to change any other
device files behavior with your installation of file ops.

Have you thought of doing a server/client instead of doing it via NFS.
If it's just GPU you care about maybe you can have a client/server of
your own that can communicate for the GPU exclusively. Perhaps you can
give it a try and then see if NFS is better option.

> -Riya
>
> On Sat, May 31, 2014 at 11:35 PM, Pranay Srivastava <pranjas at gmail.com> wrote:
>> Hi Riya,
>>
>> It's actually not the major and minor numbers, sure they decide the
>> driver and the device but when it comes to read/write you actually
>> have file_operations. So I digged around a bit and this is the one you
>> should look into,
>>
>> nfs_fhget
>>
>> If you see at the end where it installs the inode->i_op and
>> inode->fop, the device files are initialized just like as if they were
>> on the NFS client machine itself. NFS operations are not used to
>> override device files here. How about using iSCSI and all for devices?
>>
>> Maybe you can tell something more about what you are trying to do?
>>
>> Regards,
>>
>> On Thu, May 29, 2014 at 10:53 PM, riya khanna <riyakhanna1983 at gmail.com> wrote:
>>> Hi,
>>>
>>> I'm trying to access remote devices locally by mounting/exporting /dev nodes
>>> over NFS. However, looks like the access requests are treated local based on
>>> major minor numbers (e.g. "cat /mnt-dev-over-nfs/kmg" output is same as "cat
>>> /dev/kmsg")
>>>
>>> How can I change this behavior? and if it is at all feasible?
>>>
>>> Thanks,
>>> Riya
>>>
>>>
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>>
>>
>>
>> --
>>         ---P.K.S



-- 
        ---P.K.S