Re: [dm-devel] [LSF/MM TOPIC] block, dm: restack queue_limits

2018-01-30 Thread Ewan D. Milne
On Tue, 2018-01-30 at 16:07 +0100, Hannes Reinecke wrote: > On 01/29/2018 10:08 PM, Mike Snitzer wrote: > > We currently don't restack the queue_limits if the lowest, or > > intermediate, layer of an IO stack changes. > > > > This is particularly unfortunate in the case of FLUSH/FUA which may > >

Re: [for-4.14 RFC PATCH 1/2] dm rq: avoid deadlock if dm-mq is stacked on old .request_fn device(s)

2017-07-14 Thread Ewan D. Milne
On Fri, 2017-07-14 at 10:19 -0400, Mike Snitzer wrote: > > Do you see a benefit to extracting that portion of your WIP patch > (removing the ->complete handler entirely)? > > Or leave well enough alone and just continue to disable dm-mq's ability > to stack on .request_fn paths? > > Given