On Sat, Nov 07, 2020 at 18:33:26 +0300, Valery Ushakov wrote: > I've upgraded my Krups (64MB RAM, diskless) to 9.99.75 as of Nov 6 and > the machine is locking up at boot time in rc.d/fccache. If I disable > fccache in rc.conf it boots but then eventually locks up when > makemandb is run. The machine doesn't respond to pings, etc, but can > enter ddb. In all cases the ddb stacktrace goes through: > > ... > uvm_fault_internal > mem_access_fault4m > memfault_sun4m > copyout > > with the top part of the stack trace varying.
This turned out to be unsafe inline asm in pmap code miscompiled by the newer gcc. Many thanks to chs@ for his help. -uwe
