linux-kernel - Re: Observing RCU stalls in kernel 5.4/5.10/5.15/6.1 stable trees

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Message-ID: <2a3fa097-8ba0-5b0e-f506-779fee5b8fef@sdinet.de>
Date:   Wed, 14 Jun 2023 15:45:41 +0200 (CEST)
From:   Sven-Haegar Koch <haegar@...net.de>
To:     Luiz Capitulino <luizcap@...zon.com>
cc:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "Bhatnagar, Rishabh" <risbhat@...zon.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "sashal@...nel.org" <sashal@...nel.org>, abuehaze@...zon.com,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Subject: Re: Observing RCU stalls in kernel 5.4/5.10/5.15/6.1 stable trees

On Wed, 14 Jun 2023, Luiz Capitulino wrote:

> On 2023-06-14 05:20, Sebastian Andrzej Siewior wrote:
>  
> > On 2023-06-14 11:14:49 [+0200], gregkh@...uxfoundation.org wrote:
> > > Oops, missed this.
> > > 
> > > Yes, there might be, can you do 'git bisect' and track down the patch
> > > that fixed this?
> > 
> > There was a report of a lockup during boot in VMs yesterday. If I
> > remember correctly this still exists and might be related to this
> > report. I'm going to have a look.
> 
> Thanks, Sebastian. Do you have a link for the discussion?

May be this, talking about the same commit as cause as this thread:

Subject: Re: [PATCH] timekeeping: Align tick_sched_timer() with the HZ 
tick. -- regression report
https://lore.kernel.org/lkml/5a56290d-806e-b9a5-f37c-f21958b5a8c0@grsecurity.net/

May not have been the best idea to respond with such big analysis to a 3 
months old dead thread, gets lost extremely easy.

c'ya
sven-haegar

-- 
Three may keep a secret, if two of them are dead.
- Ben F.