Re: [PATCH 14/19] mm: Introduce a cgroup for pinned memory

[Jason Gunthorpe]

On Thu, Feb 23, 2023 at 09:12:19AM +0000, Daniel P. Berrangé wrote:

> The memory limits we can set on VMs are somewhat limited. In general
> we prefer to avoid setting any hard per-VM memory cap by default.

So if you don't use hard limits on the memcg..

But to do this with a hard limit:
 
> We do still have to apply some tuning for VFIO, around what amount
> of memory it is allowed to lock, but that is not so bad as we just
> need to allow it to lock guest RAM which is known + an finite extra
> amount, so don't need to take account of all of QEMU's memory
> allocations in general.

Will need its own controller, right?

Jason