On 5/3/21 5:41 PM, Dave Hansen wrote: > On 5/3/21 8:15 AM, Andy Lutomirski wrote: >> How much performance do we get back if we add a requirement that only >> 2M pages (hugetlbfs, etc) may be used for private guest memory? > > Are you generally asking about the performance overhead of using 4k > pages instead of 2M for the direct map? We looked at that recently and > pulled together some data: IIUC using 2M for private guest memory wouldn't be itself sufficient, as the guest would also have to share pages with host with 2MB granularity, and that might be too restrictive? >> https://lore.kernel.org/lkml/213b4567-46ce-f116-9cdf-bbd0c884eb3c@xxxxxxxxxxxxxxx/ >
