From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on
	aws-us-west-2-korg-lkml-1.web.codeaurora.org
Received: from vger.kernel.org (vger.kernel.org [23.128.96.18])
	by smtp.lore.kernel.org (Postfix) with ESMTP id 53BF8EE57C1
	for <linux-kernel@archiver.kernel.org>; Fri,  8 Sep 2023 04:41:53 +0000 (UTC)
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S238228AbjIHEly (ORCPT <rfc822;linux-kernel@archiver.kernel.org>);
        Fri, 8 Sep 2023 00:41:54 -0400
Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48482 "EHLO
        lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S237268AbjIHElw (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Fri, 8 Sep 2023 00:41:52 -0400
Received: from muru.com (muru.com [72.249.23.125])
        by lindbergh.monkeyblade.net (Postfix) with ESMTP id D0EC41BD2;
        Thu,  7 Sep 2023 21:41:48 -0700 (PDT)
Received: from localhost (localhost [127.0.0.1])
        by muru.com (Postfix) with ESMTPS id F11068050;
        Fri,  8 Sep 2023 04:41:47 +0000 (UTC)
Date:   Fri, 8 Sep 2023 07:41:46 +0300
From:   Tony Lindgren <tony@atomide.com>
To:     Marc Haber <mh+linux-kernel@zugschlus.de>
Cc:     Sean Christopherson <seanjc@google.com>,
        Bagas Sanjaya <bagasdotme@gmail.com>,
        linux-kernel@vger.kernel.org,
        Linux Regressions <regressions@lists.linux.dev>,
        Linux KVM <kvm@vger.kernel.org>,
        Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: Linux 6.5 speed regression, boot VERY slow with anything systemd
 related
Message-ID: <20230908044146.GK11676@atomide.com>
References: <ZO4RzCr/Ugwi70bZ@google.com>
 <ZO4YJlhHYjM7MsK4@torres.zugschlus.de>
 <ZO4nbzkd4tovKpxx@google.com>
 <ZO5OeoKA7TbAnrI1@torres.zugschlus.de>
 <ZPEPFJ8QvubbD3H9@google.com>
 <20230901122431.GU11676@atomide.com>
 <ZPiPkSY6NRzfWV5Z@torres.zugschlus.de>
 <20230906152107.GD11676@atomide.com>
 <ZPmignexOJvJ5J5W@torres.zugschlus.de>
 <20230907105150.GJ11676@atomide.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20230907105150.GJ11676@atomide.com>
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

* Tony Lindgren <tony@atomide.com> [230907 13:51]:
> So I tried something similar with just kernel and ramdisk:
> 
> qemu-system-x86_64 \
> -m 768 \
> -machine pc-i440fx-2.1,accel=kvm,usb=off,dump-guest-core=off \
> -nodefaults \
> -kernel ~/bzImage \
> -initrd ~/ramdisk.img \
> -serial stdio \
> -append "console=ttyS0 debug"
> 
> It boots just fine for me. Console seems to come up a bit faster if I
> leave out the machine option. I tried this with qemu 8.0.3 on a m1 laptop
> running linux in case the machine running the qemu host might make some
> difference..

Sorry I noticed that the above example I tried on my x86_64 box, no on m1.
On m1 accel=kvm needs to be left out. Both cases work fine for me though.

Regards,

Tony