Re: [powerpc][5.13.0-rc7] Kernel warning (kernel/sched/fair.c:401) while running LTP tests

On Mon, 21 Jun 2021 at 19:32, Sachin Sant [off-list ref] wrote:

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Any thoughts Vincent?

I would prefer that we use the reason of adding the cfs in the list instead.

Something like the below should also fixed the problem. It is based on a
proposal I made to Rik sometimes ago when he tried to flatten the rq:
https://lore.kernel.org/lkml/20190906191237.27006-6-riel@surriel.com/ (local)

This will ensure that a cfs is added in the list whenever one of its  child
is still in the list.

Could you confirm that this patch fixes the problem for you too ?

Thanks for the fix.

The patch fixes the reported problem. The test ran to completion without
any failure.

Reported-by: Sachin Sant <redacted>
Tested-by: Sachin Sant <redacted>

Thanks

-Sachin