linux-kernel - Re: WARNING in enqueue_task

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Message-ID: <20190107074638.GC7213@localhost.localdomain>
Date:   Mon, 7 Jan 2019 08:46:38 +0100
From:   Juri Lelli <juri.lelli@...hat.com>
To:     luca abeni <luca.abeni@...tannapisa.it>
Cc:     syzbot <syzbot+119ba87189432ead09b4@...kaller.appspotmail.com>,
        bp@...en8.de, bristot@...hat.com, hpa@...or.com,
        linux-kernel@...r.kernel.org, luto@...nel.org, mingo@...hat.com,
        peterz@...radead.org, syzkaller-bugs@...glegroups.com,
        tglx@...utronix.de, x86@...nel.org
Subject: Re: WARNING in enqueue_task_dl

Hi,

On 02/01/19 10:15, luca abeni wrote:
> Hi all,
> (and, happy new year to everyone!)
> 
> this looks similar to a bug we have seen some time ago (a task
> switching from SCHED_OTHER to SCHED_DEADLINE while inheriting a
> deadline from a SCHED_DEADLINE task triggers the warning)...
> 
> Juri, I think you found a fix for such a bug; has it been committed?

Looks similar to the one I proposed this fix for:

https://lore.kernel.org/lkml/20181119153201.GB2119@localhost.localdomain/

AFAIK it hasn't been reviewed/tested yet. Could you (or someone) please
have a look?

Best,

- Juri