This feels more like an issue with the I/O and not with UFS specifically. But since you tried two different storage devices it couldn't be that. Perhaps there is a power or overheat issue on the system.
-Matt On Sun, Feb 10, 2019 at 1:42 PM Eric Melville <e...@rigelfore.com> wrote: > Hello there, > > After installing 5.4 my system has been getting stuck in UFS, apparently > in softdeps. > > At first I was faulting the -j12 buildworld, but then saw it in lower > parallel counts, and > > eventually saw it when looping buildworld with no -j option at all. Then I > was faulting > > my fast new NVME but eventually factored that out too by changing back to > an old > > hard drive. In any case, the faster the hardware and the more work > running, the > > more quickly and easily this seems to reproduce. > > > Typically during the phase that removes old output, the build will hang > indefinitely. > > Some processes continue to run but new ones never get going, and the old > world > > clean never makes any progress. For example ssh to the host in this state > would > > succeed to connect and authenticate, but the new shell never seems to run. > > > I suppose I should try disabling softdeps next. >