On Wed, 2017-01-11 at 14:39 -0700, Jens Axboe wrote:

I've reworked bits of this to get rid of the shadow requests, thanks
to Bart for the inspiration. The missing piece, for me, was the fact
that we have the tags->rqs[] indirection array already. I've done this
somewhat differently, though, by having the internal scheduler tag
map be allocated/torn down when an IO scheduler is attached or
detached. This also means that when we run without a scheduler, we
don't have to do double tag allocations, it'll work like before.

Hello Jens,

Thanks for having done the rework!=A0This series looks great to me. I have =
a
few small comments though. I will post these as replies to the individual
patches.

Bart.=