Re: Simulating disk failure with a writeback cache

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On Sun, Dec 18, 2016 at 03:38:54PM -0500, Josef Bacik wrote:
> On Sun, Dec 18, 2016 at 3:12 PM, Kent Overstreet <kent.overstreet@xxxxxxxxx>
> wrote:
> > On Thu, Dec 15, 2016 at 04:15:27AM +0000, Josef Bacik wrote:
> > >  dm-log-writes is probably what you want.  Thanks,
> > 
> > Oh, that actually looks pretty cool.
> > 
> > Don't suppose anyone is working on making use of it in xfstests?
> 
> Actually I had two xfstests, one that used fsstress and just made sure every
> commit point was valid (every FUA/FLUSH it found in the log) and then one
> that modified fsx to output a known good image every time it ran fsync and
> mark the log to make sure fsync did the correct thing.  I need to go back
> and clean them up and get the upstream, but I've been pretty heavily
> distracted with other things for the last year or two.  I'll make getting
> those upstream a priority after Christmas.  Thanks,

Don't suppose you could throw up just what you've currently got somewhere? It'd
save me some work.
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