RE: infinite loop when doing disk zone testing

Sorry, 1.17 with the iodepth patch for zone alignment you just posted.

-----Original Message-----
From: Jens Axboe [mailto:jens.axboe_at_oracle.com]
Sent: Thursday, January 31, 2008 8:14 AM
To: Ryan Thomas
Cc: fio-devel_at_kernel.dk
Subject: Re: infinite loop when doing disk zone testing

On Thu, Jan 31 2008, Ryan Thomas wrote:
> I have a disk that is 976773117 sectors (512 bytes) in size. I tried
> running a disk zone test with the following parameters
>
>
>
> [global]
>
> bs=64k
>
> direct=1
>
> rw=read
>
> ioengine=libaio
>
> iodepth=2
>
> zonesize=256m
>
> zoneskip=2g
>
> write_bw_log
>
>
>
> [/dev/e214.0]
>
> write_iolog=foo2
>
>
>
> When I try to run this job, everything goes well until the job reaches
> 90% done and at that point the io goes quiet. At that point the iolog
> shows that fio goes into an infinite loop of opening and closing the
> device.
>
>
>
> /dev/e214.0 read 500107640832 65536
>
> /dev/e214.0 read 500107706368 65536
>
> /dev/e214.0 close
>
> /dev/e214.0 open
>
> /dev/e214.0 close
>
> /dev/e214.0 open
>
> /dev/e214.0 close
>
> /dev/e214.0 open
>
> /dev/e214.0 close
>
> /dev/e214.0 open
>
> /dev/e214.0 close
>
> ....
>
>
>
>
>
> If I run a slightly different job where I try to align the zones at 2g
> boundaries by specifying zoneskip=1792m (g-256m ) the job runs just
> fine.
>
>
>
> The problem is that the disk only has 207 full zonesize plus zoneskip
> cycles. The partial zonesize range at the end falls of the end of the
> disk resulting in failed io and apparently fio is retrying the device
to
> try and finish that last zone.

Which fio version?

-- 
Jens Axboe