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Re: [Xen-devel] RT Xen on ARM - R-Car series


On 30.01.19 14:12, Julien Grall wrote:

On 30/01/2019 20:23, LOPEZ, FUENTES NACARINO Jairo Eduardo wrote:

My e-mail client thinks the e-mail was sent from the future. Can you make sure 
your timezone is set correctly?

[    0.682996] CPU features: detected feature: Kernel page table isolation 

(XEN) p2m.c:1844: d0v1: Failed to walk page-table va 0xffff800013f59c57
(XEN) p2m.c:1844: d0v2: Failed to walk page-table va 0xffff800013f70c57
(XEN) p2m.c:1844: d0v1: Failed to walk page-table va 0xffff800013f59c48
(XEN) p2m.c:1844: d0v2: Failed to walk page-table va 0xffff800013f70c48

</ this continues infinitely>

Is this normal. Could the error have anything to do with me using the 
dom0_max_vpcus=4 bootarg for Xen?

No this is a unknown
I'm sure you did mean "a known".

benign issue when using KPTI kernel on Xen (see [1]). I still haven't found 
time to fix it and would appreciate help to solve the issue.

I've looked through the thread, and it seems it is not even decided how should 
it be fixed. Should it be a new interface, of fix would fit the existing, and 
the thread died pretty long ago.
On my side I just commented out that printk, because it renders a debug build 
And I'm pretty sure Jairo is not up to fixing such XEN issues.

[1] https://lists.xen.org/archives/html/xen-devel/2018-03/msg00223.html

Andrii Anisov.

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