On Wed, Apr 10, 2019 at 06:51:16PM +0200, Sergio Lopez wrote: > Perhaps it'd be worth doing a simple PoC outside QEMU, using the > vhost-user-blk example server to avoid the block layer complexity and > evaluate the raw benefits with different kinds of backends and > workloads.
Sure, it's worth experimenting with. libvirt is on top of QEMU. oVirt or OpenStack is on top of libvirt. It's hard for the user or management tools to set low-level tuning options like this. We either need smart defaults or self-tuning - knobs are mostly useful for benchmarking and for a very small number of expert users. Stefan
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