Re: [PATCH] vhost: support upto 509 memory regions

On 17/02/2015 10:02, Michael S. Tsirkin wrote:

quoted

Increasing VHOST_MEMORY_MAX_NREGIONS from 65 to 509
to match KVM_USER_MEM_SLOTS fixes issue for vhost-net.

Signed-off-by: Igor Mammedov <redacted>

This scares me a bit: each region is 32byte, we are talking
a 16K allocation that userspace can trigger.

What's bad with a 16K allocation?

How does kvm handle this issue?

It doesn't.

Paolo