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Re: [vfio-users] VM doesn't book with kernel 4.2.3-1-vfio



It appears it may have been blind luck that I got anything to boot at all. Seems all the work required for the fix is not done yet...:

https://www.mail-archive.com/kvm vger kernel org/msg121381.html

On 10/20/2015 03:03 PM, globalgorrilla fastmail fm wrote:
Sry, short reference should be 529a5a8:

https://github.com/tianocore/edk2/commit/529a5a860996b5e83941bab50a7b8604139264a1


I'm also using qemu 2.4.0.1.

I'm seeing high CPU load on boot the (TianoCore/EDK/OVMF bit) but
eventually things settle down once Windows is running.

Thanks to Janusz and others who have driven and are driving the issue
with the EDK team.

On 20 Oct 2015, at 10:05, francesco dicarlo wrote:

can you link the commit on github? can't seem to find it...

2015-10-20 18:49 GMT+02:00 <globalgorrilla fastmail fm>:

I'm now able to boot my VM again with OVMF and 4.3.0-rc6. I think
this is
the fix for OVMF:

edk2 git commit 39264a1
...
  1) Swap PTE init order for QEMU compatibility.
     Current PTE initialization algorithm works on HW but breaks QEMU
     emulator.  Update the PTE initialization order to be compatible
     with both.
...

I haven't yet discovered if any MTRR fixes went into 4.3.0-rc6 for
this to
happen or if this fixes for 4.2 as well.


On 19 Oct 2015, at 23:53, Okky Hendriansyah wrote:

Yes, the maintainer made the LTS version because of the issue on the
4.2.x
kernel.

--
Okky Hendriansyah

On October 20, 2015 at 13:50:58, Alexander Petrenz
(petrenz a gmail com)
wrote:

Oh there is an lts version? Thanks! I wasn´t aware of that.

Regards
Alex

On Tue, Oct 20, 2015 at 8:39 AM, Okky Hendriansyah
<okky nostratech com>
wrote:
Hi,

The GLib warning is because of the upgrade on GLib which makes existing
QEMU throw this warning. I remove the warning by applying the patch
from
https://lists.gnu.org/archive/html/qemu-devel/2015-09/msg04438.html

You might want to try linux-vfio-lts, the package maintainer of
linux-vfio made an LTS version which is based on 4.1.10 kernel (
https://aur.archlinux.org/packages/linux-vfio-lts/).

Thanks.
--
Okky Hendriansyah

On October 20, 2015 at 13:19:47, Alexander Petrenz
(petrenz a gmail com)
wrote:

Since I´m unable to fix this issue and there doesn´t seem to be much
information about it... is there an archive where I can get an older
pkgbuild for a 4.1 vfio kernel?

Regards
Alex

On Sun, Oct 18, 2015 at 10:45 PM, Alexander Petrenz
<petrenz a gmail com>
wrote:
OK I got rid of the GLib-Warning, but the KVM error is still there.

On Sun, Oct 18, 2015 at 10:14 PM, Alexander Petrenz
<petrenz a gmail com>
wrote:
Thanks for the Hint. I try the short patch vor OVMF

On Sun, Oct 18, 2015 at 10:06 PM, Janusz <januszmk6 gmail com> wrote:
W dniu 18.10.2015 o 21:18, Alexander Petrenz pisze:

Hi,

yesterday I compiled the recent version of the vfio kernel version in
AUR. Now my VM doesn't start at all.
I'm getting a reproducable error message
(http://pastebin.com/YsNBX4Yj)
There are no other messages in dmesg, but those I posted yesterday.
Same goes for hardware configuration
According to lsmod the KVM module is loaded.

Is there some configuration I need to change?

Regards
Alex

Are you using OVMF?
I don't know if this is the same because you also getting
"(process:3267): GLib-WARNING **: gmem.c:482: custom memory allocation
vtable not supported" but there is a known bug in ovmf, since kernel
4.2
because of changes in kvm, you wont be able to start properly VM with
more than one core,
http://www.mail-archive.com/kvm vger kernel org/msg121088.html




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