linux-kernel - Re: [Bug Report] Linux v6.15-rc7 boot failure on Xen-4.17

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Message-Id: <C28A8745-02AD-489E-B2F3-6DE81C511783@zytor.com>
Date: Tue, 27 May 2025 12:21:37 -0700
From: Xin Li <xin@...or.com>
To: Groß Jürgen <jgross@...e.com>
Cc: Gupta Pawan <pawan.kumar.gupta@...ux.intel.com>,
        linux-kernel@...r.kernel.org, x86@...nel.org,
        Zijlstra Peter <peterz@...radead.org>,
        Hansen Dave <dave.hansen@...ux.intel.com>,
        alexandre.chartre@...cle.com,
        Cooper Andrew <andrew.cooper3@...rix.com>,
        Zhang Tao1 <tao1.zhang@...el.com>
Subject: Re: [Bug Report] Linux v6.15-rc7 boot failure on Xen-4.17


> On May 27, 2025, at 11:36 AM, Jürgen Groß <jgross@...e.com> wrote:
> 
> On 27.05.25 19:54, Xin Li wrote:
>> On 5/27/2025 10:46 AM, Pawan Gupta wrote:
>>>> Attached is the serial console log and my kernel config.
>>> Serial logs aren't telling much. I do not have a Xen setup to test, without
>>> Xen the config that you provided is booting a KVM guest just fine.
>> Yeah, as I replied to Juergen, the same kernel binary boots fine as
>> "native".
>> Unfortunately when booting as dom0 on Xen, it keeps rebooting w/o
>> helpful log.
> 
> What about booting Xen on bare metal, i.e. no KVM being involved?

The same exact problem happens on Intel Simics.  And I got to see it’s a NX page fault in dom0 kernel during apply alternatives.

It takes a while for me to set it up on bare metal so it won’t happen so soon.

A more serious question in my mind right now is that who are acutely testing latest vanilla Linux on xen?