Re: [libvirt] [RFC] support memory reserved feature and optimize mlock guest memory propose

Il 05/03/2014 09:01, Zhanghailiang ha scritto:

Hi all：

Currently, we use cgroup(memory) to support memory QoS on KVM platform, and use "mlock" on qemu to support "memory reserved".

The "mlock" seems to be not appropriate.

Now qemu "mlock" memory in the main thread, which would lock iothread (qemu_mutex_lock_iothread), if the memory size is large, that will consume lots of time.

It means whenever we want to set a new 'mlock', the VM would be blocked for a while.

I'm not sure I understand how the mlock-ed memory is used. Are you using a custom malloc, for example with g_mem_set_vtable? Paolo