[dm-devel] dm-cache coherence issue

[Joe Thornber]

On Sat, Jun 24, 2017 at 03:56:54PM +0200, Johannes Bauer wrote:
> So I seem to have a very basic misunderstanding of what the cleaner
> policy/dirty pages mean. Is there a way to force the cache to flush
> entirely? Apparently, "dmsetup wait" and/or "sync" don't do the job.

Your understanding is correct.  There is a tool in the latest thinp
tools release called cache_writeback that does offline decommissioning
of a cache.

I'll try and reproduce your scenario and get back to you.

- Joe