linux-kernel - Re: Linux 6.5 speed regression, boot VERY slow with anything systemd related

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Message-ID: <ZQAK7e/yuNFiBb56@torres.zugschlus.de>
Date:   Tue, 12 Sep 2023 08:53:33 +0200
From:   Marc Haber <mh+linux-kernel@...schlus.de>
To:     Tony Lindgren <tony@...mide.com>
Cc:     Sean Christopherson <seanjc@...gle.com>,
        Bagas Sanjaya <bagasdotme@...il.com>,
        linux-kernel@...r.kernel.org,
        Linux Regressions <regressions@...ts.linux.dev>,
        Linux KVM <kvm@...r.kernel.org>,
        Paolo Bonzini <pbonzini@...hat.com>
Subject: Re: Linux 6.5 speed regression, boot VERY slow with anything systemd
 related

On Mon, Sep 11, 2023 at 03:53:40PM +0300, Tony Lindgren wrote:
> * Marc Haber <mh+linux-kernel@...schlus.de> [230909 20:08]:
> > On Thu, Sep 07, 2023 at 01:51:50PM +0300, Tony Lindgren wrote:
> > > Still a minimal reproducable test case is needed.. Or do you have the
> > > dmesg output of the failing boot?
> > 
> > I have both dmesg output of a failing boot (with my kernel) and of a
> > successful boot (with the Debian kernel). Attached.
> 
> Thanks I don't see anything strange there, serial ports are probed in
> both cases.

Yes, they do actually WORK in both cases, and even with the normal
speed, unless systemd begins doing its work, then the "bad" case keeps
running into obvious 30 second timeouts.

Greetings
Marc

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