linux-kernel - RE: [PATCH] sched/fair: fix pick_eevdf to always find the correct se

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Message-ID: <OS0PR01MB592295E06AD01CAEFBA83BF386CAA@OS0PR01MB5922.jpnprd01.prod.outlook.com>
Date:   Thu, 5 Oct 2023 15:08:36 +0000
From:   Biju Das <biju.das.jz@...renesas.com>
To:     Peter Zijlstra <peterz@...radead.org>
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Subject: RE: [PATCH] sched/fair: fix pick_eevdf to always find the correct se

Hi Peter Zijlstra,

> Subject: Re: [PATCH] sched/fair: fix pick_eevdf to always find the correct
> se
> 
> On Thu, Oct 05, 2023 at 07:31:34AM +0000, Biju Das wrote:
> 
> > [   26.099203] EEVDF scheduling fail, picking leftmost
> 
> This, that the problem.. the rest is just noise because printk stinks.
> 
> Weirdly have not seen that trigger, and I've been running with this patch
> on for a few days now :/

I agree Original issue is "EEVDF scheduling fail, picking leftmost"
Which is triggering noisy lock warning messages during boot.

2 platforms are affected both ARM platforms(Renesas and Samsung)
Maybe other platforms affected too.

I am happy to test if there is a fix available for this issue.

Cheers,
Biju