DragonFly BSD 6.4.0

DragonFly version 6.4 is the next step in the 6.x release series. This version has hardware support for type-2 hypervisors with NVMM, an amdgpu driver, the experimental ability to remote-mount HAMMER2 volumes, and many other changes. The details of all commits between the 6.2 and 6.4 releases are available in the associated commit messages for 6.4.0. Changes: recommend updating all systems, a locally-exploitable kernel vulnerability was fixed for this release; fix execvPe()s environment passing; fix ktrace's handling of 'long' system call return values; fix a sysv semaphore panic related to an exit race; fix a namecache bloating issue related to dead entries that could slow systems down over time....