Re: [gentoo-user] Kernel 4.19.50 constant kernel hard locks / solved

[Corbin Bird]

On 6/16/19 5:34 AM, Adam Carter wrote:
> On Sat, Jun 15, 2019 at 6:15 AM Corbin Bird <corbinbird@×××××××.net
> <mailto:corbinbird@×××××××.net>> 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