Re: Bug or no Bug?

[Jason Thorpe <thorpej%me.com@localhost>]

> On Feb 10, 2022, at 4:58 AM, Martin Husemann <martin%duskware.de@localhost> wrote:
> 
> The kernel lock is held too long while the graphics card is configured.
> I have seen that with some Nvidia cards, where I just have not been able
> to boot LOCKDEBUG kernels (example in PR 55185).
> 
> You can patch out the kernel lock spinout code (so the kernel does
> not limit the KERNEL_LOCK() spin time and you then can investigate
> other locking issues). Maybe we should offer an official option to do
> that?

Honestly, I think it’s probably better to disable “spinout” by default and have it enabled by a sysctl / option.  And possibly the spin time adjustable by sysctl, too.

-- thorpej