On Wed, Jul 17, 2013 at 11:38:50PM +0200, Jan Kara wrote:
> > It was running this..
> > https://github.com/kernelslacker/io-tests/blob/master/setup.sh
> > in a loop. After about 6 hours, that fell out. It made it all the way
> > through
> > every test a few times, which is odd, as the test should be fairly
> > deterministic.
> > Ah, I wasn't capturing the fsx seed. I'll do that on the next run.
> So inode 12 was likely the file used by fsx. OK. Looking at the script
> link, fsx is run as:
> /usr/local/bin/fsx -N 250000 -S0 foo &
> so the seed is always 0. So it is a deterministic test and there must be
> some race with writeback or something that is rarely triggered. Drat.
S0 is special. it means 'use timeofday as seed'
Dave
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