Re: [Drbd-dev] [PATCH 23/27] drbd: make intelligent use of blkdev_issue_zeroout

2018-01-16 Thread Lars Ellenberg
On Mon, Jan 15, 2018 at 10:07:38AM -0500, Mike Snitzer wrote: > > See also: > > https://www.redhat.com/archives/dm-devel/2017-March/msg00213.html > > https://www.redhat.com/archives/dm-devel/2017-March/msg00226.html > > Right, now that you mention it it is starting to ring a bell (especially >

Re: [Drbd-dev] [PATCH 23/27] drbd: make intelligent use of blkdev_issue_zeroout

2018-01-15 Thread Lars Ellenberg
On Sat, Jan 13, 2018 at 12:46:40AM +, Eric Wheeler wrote: > Hello All, > > We just noticed that discards to DRBD devices backed by dm-thin devices > are fully allocating the thin blocks. > > This behavior does not exist before > ee472d83 block: add a flags argument to

Re: [Drbd-dev] [PATCH 23/27] drbd: make intelligent use of blkdev_issue_zeroout

2018-01-12 Thread Eric Wheeler
Hello All, We just noticed that discards to DRBD devices backed by dm-thin devices are fully allocating the thin blocks. This behavior does not exist before ee472d83 block: add a flags argument to (__)blkdev_issue_zeroout The problem exists somewhere between [working] c20cfc27 block: stop