Snir, Firstly, let me reply to one specific bit of your email and also add a question. [...] > IIUC it's currently enabled by default (qemu), can it be disabled? if > not, is it planned to be configurable? The current govmm codes only sets the "cache-size" when it's different from zero: https://github.com/intel/govmm/blob/master/qemu/qemu.go#L1256-L1258 So, setting virtio_fs_cache_size here https://github.com/kata-containers/kata-containers/blob/2.0-dev/src/runtime/cli/config/configuration-qemu-virtiofs.toml.in#L113-L114 disables DAX. A question I'd like to add to Snir's question is ... Wouldn't it be safer to have `virtio_fs_cache_size = 0` as a default value when using virtio-fs, at least till DAX gets solid? [...] Best Regards, -- Fabiano Fidêncio