On 6/16/19 5:34 AM, Adam Carter wrote: > On Sat, Jun 15, 2019 at 6:15 AM Corbin Bird <[email protected] > <mailto:[email protected]>> wrote: > > Disclosure : > 1 : The CPU is a AMD FX-9590 ( Fam15h ) > 2 : Kernel command line parameter "eagerfpu=on" is being used. > > This kernel option was causing constant kernel hard locks. > ----- > General setup --> [ ] CPU isolation. > ----- > Anything that accessed the FPU would cause the CPU's ( SMP ) to "loose > sync". > > > Just to clarify; do i have this right? > > General setup --> [ ] CPU isolation. -> this is the broken setting > > General setup --> [*] CPU isolation. -> this works (and is the default) > > AFAICT in 5.x onward all the lazy FPU code is gone so its just eager. >
General setup --> [*] CPU isolation. ( this is when the lock-ups can be expected / CPU isolation Enabled ) Corbin
