linux-kernel - Re: INFO: rcu detected stall in corrupted (3)

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Message-ID: <18f27e51-a1b2-cb17-c415-31ace2f56dc6@i-love.sakura.ne.jp>
Date:   Sat, 30 Mar 2019 23:07:40 +0900
From:   Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
To:     Borislav Petkov <bp@...en8.de>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        syzbot <syzbot+65cecdd27b726c261799@...kaller.appspotmail.com>,
        syzkaller-bugs@...glegroups.com, "H. Peter Anvin" <hpa@...or.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Andy Lutomirski <luto@...nel.org>, mingo@...hat.com,
        x86@...nel.org, Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>
Subject: Re: INFO: rcu detected stall in corrupted (3)

On 2019/03/30 20:09, Borislav Petkov wrote:
> On Sat, Mar 30, 2019 at 07:57:50PM +0900, Tetsuo Handa wrote:
>> Yes. But what such threshold be? 0.1 second? 1 second? 10 seconds?
>> Can we find a threshold where everyone can agree on?
> 
> This is what we do all day on lkml: discussing changes so that (almost)
> everyone is happy with them.
> 
> :-)
> 

I think that syzbot should for now refrain from testing syscalls that change
scheduling related attributes, for mixing stall reports caused by change of
scheduling related attributes and different stall reports caused by e.g.
(almost) infinite loop due to race conditions is annoying.