Re: [PATCH v10 6/6] x86/split_lock: Enable split lock detection by kernel parameter

[Peter Zijlstra]

On Wed, Nov 20, 2019 at 04:53:23PM -0800, Fenghua Yu wrote:
> Split lock detection is disabled by default. Enable the feature by
> kernel parameter "split_lock_detect".
> 
> Usually it is enabled in real time when expensive split lock issues
> cannot be tolerated so should be fatal errors, or for debugging and
> fixing the split lock issues to improve performance.
> 
> Please note: enabling this feature will cause kernel panic or SIGBUS
> to user application when a split lock issue is detected.

ARGGGHH, by having this default disabled, firmware will _NEVER_ be
exposed to this before it ships.

How will you guarantee the firmware will not explode the moment you
enable this?