Re: [Xen-users] linux-4.7.* under xen-4.6.* gives "unhandled page fault (ec=0000)" at boot. -- Root cause found.

["Todd A. Walter" <twalter@xxxxxxxxxxxx>]

Aha!  That explains it! ;)

Thanks,

Todd

-----Original Message-----
From: Håkon Alstadheim [mailto:hakon@xxxxxxxxxxxxxxxxxx] 
Sent: Tuesday, September 13, 2016 2:53 PM
To: xen-users@xxxxxxxxxxxxx; Todd A. Walter <twalter@xxxxxxxxxxxx>
Subject: Re: [Xen-users] linux-4.7.* under xen-4.6.* gives "unhandled page 
fault (ec=0000)" at boot. -- Root cause found.

Den 12. sep. 2016 14:59, skrev Todd A. Walter:
> Hi Hakon,
>
> Yes, I am referring to your EFI memory access patch.  For whatever reason, 
> the inbuilt  EFI MEMMAP kernel function doesn't return any results  (perhaps 
> due to using GRUB2 as a bootloader but I'd thought that was fixed).  Which 
> kernel revision are you using?  I'm using Gentoo-sources-4.7.2 and I don't 
> see the patch in tree.
Sorry for the confusion. The discussion got continued on xen-devel, and I was 
told that cross-posting is a no-no. Find it by searching for this subject on 
xen-devel, or start with Message-ID:
<20160829142604.GD27665@xxxxxxxxxxxxxxxxxx> (on xen-devel) , and all will be 
clear :-) . Apparently the patch is submitted and "on its (admittedly slow) way 
to Linus" according to JBeulich@xxxxxxxx.

This lkml thread contains the relevant patch: 
http://lkml.iu.edu/hypermail/linux/kernel/1608.2/03448.html , though the patch 
in there did not apply in gentooo-sources-4.7.2 for me, so I had to do it by 
hand. That is why I did not have the relevant context available immediately.
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