Re: [PATCH 2/2] block: create ioctl to discard-or-zeroout a range of blocks

On 3/15/16 3:14 PM, Dave Chinner wrote:

What we are missing is actual numbers that show that exposing stale
data is a /significant/ win for these applications that are
demanding it. And then we need evidence proving that the problem is
actually systemic and not just a hack around a bad implementation of
a feature...

Thanks Dave; I totally agree on this point.  We've spent more than enough
time talking about how and if to implement stale data exposure, but nowhere
in this thread has there been any actual performance data indicating why
we should do it at all.

-Eric