Re: The "clockevents: Prevent timer interrupt starvation" patch causes lockups

[Eric Naim]

On 4/15/26 1:25 AM, Calvin Owens wrote:
> On Tuesday 04/14 at 15:39 +0000, Eric Naim wrote:
>> On 4/14/26 5:20 AM, Hanabishi wrote:
>>>
>>> Hello.
>>>
>>> Sorry, but this patch as of 7.0 introduced *severe* periodic lockups on my
>>> Ryzen 7700X machine.
>>> I see such messages in the log:
>>>
>>> clocksource: Long readout interval, skipping watchdog check: cs_nsec:
>>> 2897344852 wd_nsec: 2897356996
>>>
>>> Reverting d6e152d905bdb1f32f9d99775e2f453350399a6a for mainline fixes the
>>> issue for me.
>>>
>>
>> Hi maintainers,
>>
>> several users from CachyOS has reported this regression as well. We landed on
>> the same bisection. One of the users that could reproduce this reliably
>> reproduced this just by watching a YouTube video in a browser, and observed
>> freezes and stutters when interacting with the system.
> 
> Huh, I can't reproduce this at all across 10+ machines. Can you share
> the Kconfig you're seeing this on?

Right, here it is [1]. CachyOS does carry a lot of downstream patches, but I
made sure to reproduce this on mainline before reporting here.

[1]
https://github.com/CachyOS/linux-cachyos/blob/4224303b6d7a50dd1cc3ffa78864050cc9536eec/linux-cachyos/config

> 
> Thanks,
> Calvin

-- 
Regards,
  Eric