Re: [PATCH v2 1/7] sched/fair: Fix zero_vruntime tracking

[Peter Zijlstra]

On Mon, Mar 30, 2026 at 08:07:06PM +0530, K Prateek Nayak wrote:
> Hello Peter,
> 
> On 3/30/2026 3:40 PM, Peter Zijlstra wrote:
> > This means, that if the two tasks playing leapfrog can reach the
> > critical speed to reach the overflow point inside one tick's worth of
> > time, we're up a creek.
> > 
> > If this is indeed the case, then the below should cure things.
> 
> I have been running with this for four hours now and haven't seen
> any splats or crashes on my setup. I could reliably trigger the
> warning from __sum_w_vruntime_add() within an hour previously so
> it is safe to say I was hitting exactly this.
> 
> Feel free to include:
> 
> Tested-by: K Prateek Nayak <kprateek.nayak@xxxxxxx>

Ha!, excellent. Thanks!