linux-kernel - Re: boot failure of linux-next due to 1248fb6a8201 ("x86/mm: Randomize per-cpu entry area")

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Date:   Fri, 28 Oct 2022 17:06:50 +0100
From:   Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:     Dave Hansen <dave.hansen@...el.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Kees Cook <keescook@...omium.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>,
        Andy Lutomirski <luto@...nel.org>,
        linux-kernel@...r.kernel.org, linux-next@...r.kernel.org
Subject: Re: boot failure of linux-next due to 1248fb6a8201 ("x86/mm:
 Randomize per-cpu entry area")

On Fri, Oct 28, 2022 at 3:33 PM Dave Hansen <dave.hansen@...el.com> wrote:
>
> On 10/28/22 06:29, Sudip Mukherjee (Codethink) wrote:
> > I will be happy to test any patch or provide any extra log if needed.
> > Though I am not sure how I will collect extra logs (if needed) as there
> > was no output from qemu.
>
> Could you share your qemu config?  The command-line would be fine.  Does
> it have a serial console set up?

qemu-system-x86_64 -m 2048 -smp 2 -chardev
socket,id=SOCKSYZ,server,nowait,host=localhost,port=46514 -mon
chardev=SOCKSYZ,mode=control -display none -serial stdio -no-reboot
-name VM-test -device virtio-rng-pci -enable-kvm -cpu
host,migratable=off -device e1000,netdev=net0 -netdev
user,id=net0,restrict=on,hostfwd=tcp:127.0.0.1:28993-:22 -hda
bullseye.img -snapshot -kernel bzImage -append "root=/dev/sda
console=ttyS0 net.ifnames=0 biosdevname=0"

serial is via stdio, and in normal boots I get the bootlog in the
terminal, but in this case there was nothing.


-- 
Regards
Sudip