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

Sun Oct 25 05:16:34 UTC 2015

Does your setup require the ACS patch or are you running a unmodified
kernel?
On Oct 25, 2015 1:05 AM, <globalgorrilla at fastmail.fm> wrote:

> qemu and EDK2/OVMF from git have me running again on 4.2.4 and 4.3.0-rc6.
>
> Performance seems quite a bit down with 4.3.0-rc6. Performance in 4.2.4
> seems much closer to that with 4.1.
>
> On 20 Oct 2015, at 21:54, globalgorrilla at fastmail.fm wrote:
>
> 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 at 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 at 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 at 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 at 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 at 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 at 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 at 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 at 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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