[dm-devel] dm-multipath low performance with blk-mq

[Benjamin Marzinski]

On Tue, Jan 26, 2016 at 11:03:24AM -0500, Mike Snitzer wrote:
> 
> Christoph, any chance you could rebase your 'nvme-loop.2' on v4.5-rc1?
> 
> Or point me to a branch that is more current...

Failing that, you could try using the null_blk device directly. It
doesn't provide enough information for multipathd to set up a device on
it, but you could manually create one with dmsetup. Without multipathd
you won't get failback working, but it should be good fine for
performance work.

-Ben

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