Re: [PATCH 3/3] LoongArch: Allow to enable PREEMPT_RT

[Sebastian Andrzej Siewior]

On 2024-11-14 19:07:37 [+0800], Huacai Chen wrote:
> Hi, Sebastian,
Hi,

> > Why is ntpd/chronyd service affecting this? Is it running at prio 99?
> > Otherwise it should not be noticed.
> No, ntpd/chronyd doesn't affect latency. But they may trigger RTC
> synchronization every 11 minutes, and RTC synchronization affects
> latency. We can keep ntpd/chronyd running but disable RTC
> synchronization by configuration, this is the least aggressive method.

What is "RTC synchronization" in this context?

> > Is lockdep complaining in any workloads?
> > Is CONFIG_DEBUG_ATOMIC_SLEEP leading to any complains?
> This needs more tests because I haven't enabled them.

That would be good. It would show if there is anything that has not yet
been noticed.

> Huacai

Sebastian