Re: Inappropriate ioctl error on Solaris with direct=1

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* Jens Axboe <jaxboe@xxxxxxxxxxxx> wrote:
> On 2010-11-16 14:14, Sebastian Kayser wrote:
> > I would like to provide fio packages for Solaris 10 (via opencsw.org).
> > Building 1.44.2 worked fine, but when running fio with direct=1, it
> > fails with an ioctl error. Is this to be expected?
> > 
> > [...]
> > 
> > # truss -ftopen,ioctl fio --name=test --size=1g --rw=write --filename=foo --runtime=60 --direct=1
> > ...
> > 2472:   ioctl(1, TCGETA, 0x08045814)                    = 0
> > test: (g=0): rw=write, bs=4K-4K/4K-4K, ioengine=sync, iodepth=1
> > 2472:   open64("/tmp/.fio_mutex.psaa1e", O_RDWR|O_CREAT|O_EXCL, 0600) = 8
> > 2472:   open64("/tmp/.fio_mutex.qsaa1e", O_RDWR|O_CREAT|O_EXCL, 0600) = 9
> > Starting 1 process
> > test: Laying out IO file(s) (1 file(s) / 1024MB)
> > 2472:   open64("foo", O_WRONLY|O_CREAT, 0644)           = 10
> > 2473:   open64("foo", O_RDWR|O_CREAT, 0600)             = 7
> > 2473:   ioctl(7, _ION('f', 76, 0), 0x00000001)          Err#25 ENOTTY
> > fio: pid=2473, err=25/file:ioengines.c:404, func=fio_set_odirect, error=Inappropriate ioctl for device
> 
> Not sure what the situation is on Solaris, but at least on Linux the
> file system has to support direct IO. What file system do you have on
> /tmp? Does it work if you place the files somewhere else?

The above test was carried out on ZFS. I now also tested on UFS where
direct=1 work just fine. Thanks for the pointer, will go out and look
into the ZFS + direct I/O details. Would it be asked too much to have
fio emit an error message hinting towards the "FS needs to be direct I/O
aware" caveat?

> > On a related note: do you guys have access to Solaris systems? If not, we
> > do happily provide access to our build farm (Solaris 8/9/10, x86/SPARC,
> > equipped with gcc3/4 and Sun Studio 11/12) for upstream mainainers [1]. So
> > just let me know, if this sounds beneficial to you.
> 
> I used to have a small T2 box on my desk that could boot into Solaris,
> that's where I did the initial port and testing. But I don't anymore.
> But to be honest, I would rather rely on someone trusted to tell me that
> it works on platform XYZ, I just don't have the resources to run a full
> battery of tests on all the platforms that fio supports every time I do
> a release.

Understood. Feel free to let us know in case you find yourself in need
of Solaris access anyway.

Sebastian
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