Re: Re: [linus:master] [sched/eevdf] 2227a957e1: BUG:kernel_NULL_pointer_dereference,address

[Abel Wu]

On 1/30/24 10:09 PM, Oliver Sang Wrote:
> hi, Abel,
>
> On Tue, Jan 30, 2024 at 06:13:32PM +0800, Abel Wu wrote:
> > On 1/30/24 3:24 PM, kernel test robot Wrote:
> > > we found this issue happens in very random way (23 out of 999 runs).
> > > but keeps clean on parent.
> >
> > Thanks for reporting, I will try to reproduce the issue. Does the 'parent'
> > mean the same code branch without this commit?
>
>
> it just means the parent in git log.
>
> xsang@inn:/c/repo/linux$ git log --oneline --graph 2227a957e1
> * 2227a957e1d5b sched/eevdf: Sort the rbtree by virtual deadline
> * 84db47ca7146d sched/numa: Fix mm numa_scan_seq based unconditional scan  <-- parent

Thanks for clarifying, Oliver. And can you please check the parent's
dmesg for the log:

	pr_err("EEVDF scheduling fail, picking leftmost\n");

which potentially turns a kernel panic to a message.