Re: domU memory exceeded =?=> spontaneous reboots

[Paul Leiber <paul@xxxxxxxxxxxxxxxx>]

Am 17.03.2025 um 18:47 schrieb Mike:
> On Mar 1, 2025, Paul Leiber wrote:
> > I can access
> > Xen's serial console via SoL. I successfully tried Intel Manageability
> > Commander and Mesh Commander.
> I set up an IPMI connection to the Xen box.  I set "loglvl=all" and
> "guest_loglvl=all", and am seeing accordingly more messages on the monitor.
>
> I set the BIOS setting for the P1 power level at 87W, the maximum dissipation
> that the fanless case is supposed to be able to handle.  I did this just to
> prevent overheating, though I still don't believe that's an issue.
>
> I also set "noreboot=true", yet when the system failed spontaneously again,
> it rebooted as well.  I know this setting works, because when I manually
> rebooted with "shutdown -r", the reboot didn't happen; I had to force it
> manually.  This is concerning to me, since it suggests that the failure is
> happening at a lower level than what Xen controls.
>
> I'm still not seeing the boot output on the SOL console.  I'm using the one
> that's built into the Supermicro IPMI web console, which is based on Java
> WebStart--a rather old and oddball technology.  I should try using `ipmitool`
> or such.
>
> But I think the real issue with SOL is in the BIOS settings.  It's a
> Supermicro board, and the settings appear to be in the "Advanced" menu bar.
> Under "Serial Port Console Redirection", "SOL Console Redirection" is already
> "Enabled"; under "AST2600SEC Super IO Configuration" > "SOL Configuration",
> "SOL" is already "Enabled" with "Device Settings" of "IO=2F8h;  IRQ=3;".  So
> I'm adding "com2=115200,8n1,0x2f8,3 console=com2,vga" to Xen.  Yet I'm still
> seeing the output on the VGA monitor.  It's not clear to me whether I need to
> redirect one of the COM ports as well.  "dmesg | grep ttyS" gets me that
> ttyS1 (= COM2?) is at 0x2f8, IRQ 3.
Looks similar to what I am doing:

loglvl=all guest_loglvl=all com1=115200,8n1,0xe2a0,17 console=vga,com1

Did you check the wiki on serial console [1]? It has a paragraph on SoL 
("Configuring serial console for non-standard PCI serial ports (for 
example Intel AMT)").
Best regards,

Paul

[1] https://wiki.xenproject.org/wiki/Xen_Serial_Console