Re: [Xen-devel] [Xen EFI] Impossible to limit the dom0 memory

["msd+xen-devel@xxxxxx" <msd+xen-devel@xxxxxx>]

# About the kernel crash

> Did you read the above?
I just wanted to say that I have solved the kernel panic crash that I 
had before, when you explained "Xen doesn't crash at all. It's the Dom0 
kernel which panics".
Just for information the crash happens if I put the "console=com1" to 
the kernel command line.
```
kernel=vmlinuz root=/dev/md2 ro rootdelay=10 noquiet nosplash 
earlyprintk=xen console=com1
```

And this, I understand, is not linked to Xen.

# About the Xen Dom0 crash

> This tells us (together with the page fault error code) that the
> Dom0 kernel tried to provide memory as kernel stack which
> can't be written. This may be a Dom0 kernel stack overflow,
> but there may also be other reasons. At this point I can't
> exclude there being some root cause in Xen, but the issue
> needs to be investigated from the Dom0 kernel side.
I have tested with the version 4.9 and 4.14 of the kernel from Debian 
and the crash occurs when there is the option "dom0_mem=1G,max:1G".
https://packages.debian.org/stretch/linux-image-amd64
https://packages.debian.org/stretch-backports/linux-image-amd64

Do you want that I test something else ?

Regards,


Guillaume

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