On 02.12.21 18:27, Mike Kravetz wrote: > On 12/2/21 04:47, David Hildenbrand wrote: >> On 02.12.21 11:19, fei luo wrote: >>> >>> When reusing the page that has been cleared, there is no need to clear it >>> >>> again, which also speeds up the memory allocation of user-mode programs. >>> >>> >>> Is this feature feasible? >> >> "init_on_free=1" for the system as a whole, which might sounds like what >> might tackle part of your use case. >> > > Certainly init_on_free will not make much difference if VMs are backed by > hugetlb pages. We (Joao and myself) have thought about clearing hugetlb > pages from user space in an attempt speed up launching of VMs backed by > hugetlb pages. > I remember that discussion. And I also recall a discussion regarding extending init_on_free semantics to hugetlbfs. -- Thanks, David / dhildenb
