Fwd: fio: ruh info failed

Fwd: fio: ruh info failed

[Shivashekar Murali Shankar]

Hi,

I am currently testing fio with io_uring on an FDP-capable drive, but
I see failures such as “fio: ruh info failed” when trying to run FDP
job files. This is run on an XFS file system on a mounted drive. Do we
have support for this?

Below is my fio job file:

[global]
ioengine=io_uring
direct=1
bs=4k
iodepth=32
rw=write
numjobs=1
group_reporting
fdp=1

[largedata]
filename=/mnt/nvme/largedata
size=30G
fdp_pli=1

--
Thanks and Regards,
Shivashekar Murali Shankar,

Re: Fwd: fio: ruh info failed

[Jens Axboe]

On 9/26/25 1:30 PM, Shivashekar Murali Shankar wrote:
> Hi,
> 
> I am currently testing fio with io_uring on an FDP-capable drive, but
> I see failures such as “fio: ruh info failed” when trying to run FDP
> job files. This is run on an XFS file system on a mounted drive. Do we
> have support for this?
> 
> Below is my fio job file:
> 
> [global]
> ioengine=io_uring
> direct=1
> bs=4k
> iodepth=32
> rw=write
> numjobs=1
> group_reporting
> fdp=1
> 
> [largedata]
> filename=/mnt/nvme/largedata
> size=30G
> fdp_pli=1

It's generally a good idea to CC the folks that worked on this, and
probably use the fio list rather than the io_uring list...

Adding them.

-- 
Jens Axboe

Re: Fwd: fio: ruh info failed

[Vincent Fu]

On Fri, Sep 26, 2025 at 5:43 PM Jens Axboe <axboe@kernel.dk> wrote:
>
> On 9/26/25 1:30 PM, Shivashekar Murali Shankar wrote:
> > Hi,
> >
> > I am currently testing fio with io_uring on an FDP-capable drive, but
> > I see failures such as “fio: ruh info failed” when trying to run FDP
> > job files. This is run on an XFS file system on a mounted drive. Do we
> > have support for this?
> >
> > Below is my fio job file:
> >
> > [global]
> > ioengine=io_uring
> > direct=1
> > bs=4k
> > iodepth=32
> > rw=write
> > numjobs=1
> > group_reporting
> > fdp=1
> >
> > [largedata]
> > filename=/mnt/nvme/largedata
> > size=30G
> > fdp_pli=1
>

FDP support is currently only available for NVMe character devices.
See the example here:

https://github.com/axboe/fio/blob/master/examples/uring-cmd-fdp.fio

> It's generally a good idea to CC the folks that worked on this, and
> probably use the fio list rather than the io_uring list...
>
> Adding them.
>
> --
> Jens Axboe
>

Re: Fwd: fio: ruh info failed

[Shivashekar Murali Shankar]

thanks much vincent. any idea when this might get supported? any other
work around for this ?

On Fri, Sep 26, 2025 at 2:46 PM Vincent Fu <vincentfu@gmail.com> wrote:
>
> On Fri, Sep 26, 2025 at 5:43 PM Jens Axboe <axboe@kernel.dk> wrote:
> >
> > On 9/26/25 1:30 PM, Shivashekar Murali Shankar wrote:
> > > Hi,
> > >
> > > I am currently testing fio with io_uring on an FDP-capable drive, but
> > > I see failures such as “fio: ruh info failed” when trying to run FDP
> > > job files. This is run on an XFS file system on a mounted drive. Do we
> > > have support for this?
> > >
> > > Below is my fio job file:
> > >
> > > [global]
> > > ioengine=io_uring
> > > direct=1
> > > bs=4k
> > > iodepth=32
> > > rw=write
> > > numjobs=1
> > > group_reporting
> > > fdp=1
> > >
> > > [largedata]
> > > filename=/mnt/nvme/largedata
> > > size=30G
> > > fdp_pli=1
> >
>
> FDP support is currently only available for NVMe character devices.
> See the example here:
>
> https://github.com/axboe/fio/blob/master/examples/uring-cmd-fdp.fio
>
> > It's generally a good idea to CC the folks that worked on this, and
> > probably use the fio list rather than the io_uring list...
> >
> > Adding them.
> >
> > --
> > Jens Axboe
> >



-- 
Thanks and Regards,
Shivashekar Murali Shankar,