userfaultfd is used at run time in 2 crates (of which 1 optionally).

Number of dependers userfaultfd version Downloads/month
1 0.9.0 143K
1 0.8.1 98K
Depender (with downloads and own rev deps) userfaultfd version
35K 16 vhost-user-backend optional ^0.9.0
tantivy-uffd ^0.8.1