Re: [win-pv-devel] Network and disk pv not working on windows 10 pro 64 bit with latest winpv build and xen 4.6.0

[Paul Durrant <Paul.Durrant@xxxxxxxxxx>]

> -----Original Message-----
> From: Fabio Fantoni [mailto:fabio.fantoni@xxxxxxx]
> Sent: 13 October 2015 15:43
> To: Paul Durrant; win-pv-devel@xxxxxxxxxxxxxxxxxxxx
> Cc: Stefano Stabellini
> Subject: Re: [win-pv-devel] Network and disk pv not working on windows 10
> pro 64 bit with latest winpv build and xen 4.6.0
> 
> Il 13/10/2015 16:20, Paul Durrant ha scritto:
> >> -----Original Message-----
> >> From: Fabio Fantoni [mailto:fabio.fantoni@xxxxxxx]
> >> Sent: 13 October 2015 15:14
> >> To: Paul Durrant; win-pv-devel@xxxxxxxxxxxxxxxxxxxx
> >> Cc: Stefano Stabellini
> >> Subject: Re: [win-pv-devel] Network and disk pv not working on windows
> 10
> >> pro 64 bit with latest winpv build and xen 4.6.0
> >>
> >>
> >>
> >> Il 13/10/2015 15:39, Paul Durrant ha scritto:
> >>>> -----Original Message-----
> >>>> From: Fabio Fantoni [mailto:fabio.fantoni@xxxxxxx]
> >>>> Sent: 13 October 2015 14:21
> >>>> To: Paul Durrant; win-pv-devel@xxxxxxxxxxxxxxxxxxxx
> >>>> Cc: Stefano Stabellini
> >>>> Subject: Re: [win-pv-devel] Network and disk pv not working on
> windows
> >> 10
> >>>> pro 64 bit with latest winpv build and xen 4.6.0
> >>>>
> >>>>
> >>>>
> >>>> Il 13/10/2015 11:45, Paul Durrant ha scritto:
> >>>>>> -----Original Message-----
> >>>>>> From: win-pv-devel-bounces@xxxxxxxxxxxxxxxxxxxx [mailto:win-pv-
> >> devel-
> >>>>>> bounces@xxxxxxxxxxxxxxxxxxxx] On Behalf Of Fabio Fantoni
> >>>>>> Sent: 12 October 2015 16:39
> >>>>>> To: Paul Durrant; win-pv-devel@xxxxxxxxxxxxxxxxxxxx
> >>>>>> Cc: Stefano Stabellini
> >>>>>> Subject: Re: [win-pv-devel] Network and disk pv not working on
> >> windows
> >>>> 10
> >>>>>> pro 64 bit with latest winpv build and xen 4.6.0
> >>>>>>
> >>>>>> Il 12/10/2015 14:15, Paul Durrant ha scritto:
> >>>>>>>> -----Original Message-----
> >>>>>>>> From: win-pv-devel-bounces@xxxxxxxxxxxxxxxxxxxx [mailto:win-
> pv-
> >>>> devel-
> >>>>>>>> bounces@xxxxxxxxxxxxxxxxxxxx] On Behalf Of Fabio Fantoni
> >>>>>>>> Sent: 12 October 2015 11:26
> >>>>>>>> To: win-pv-devel@xxxxxxxxxxxxxxxxxxxx
> >>>>>>>> Cc: Paul Durrant
> >>>>>>>> Subject: [win-pv-devel] Network and disk pv not working on
> >> windows
> >>>> 10
> >>>>>> pro
> >>>>>>>> 64 bit with latest winpv build and xen 4.6.0
> >>>>>>>>
> >>>>>>>> Dom0: Jessie (debian 8) 64 bit, kernel 3.16 from official repository,
> >>>>>>>> xen 4.6.0, other installation details here:
> >>>>>>>> ./configure --prefix=/usr --disable-blktap1 --disable-qemu-
> >> traditional
> >>>>>>>> --disable-rombios --with-system-
> seabios=/usr/share/seabios/bios-
> >>>>>> 256k.bin
> >>>>>>>> --with-extra-qemuu-configure-args="--enable-spice --enable-
> usb-
> >>>> redir"
> >>>>>>>> --disable-blktap2 --enable-systemd
> >>>>>>>> xen services enabled with:
> >>>>>>>> systemctl enable xenstored.service
> >>>>>>>> systemctl enable xenconsoled.service
> >>>>>>>> systemctl enable xen-init-dom0.service
> >>>>>>>> systemctl enable xen-qemu-dom0-disk-backend.service
> >>>>>>>> systemctl enable xendomains.service
> >>>>>>>>
> >>>>>>>> domU xl cfg:
> >>>>>>>> http://lists.xen.org/archives/html/xen-devel/2015-
> >>>> 10/txtsAaP2yM2Vx.txt
> >>>>>>>> Still use emualted disk and network and xen pv network is unable
> to
> >>>>>>>> start for code 10 error (from windows devices manager). (see also
> >>>>>>>> screenshot in attachment)
> >>>>>>>>
> >>>>>>>> In attachment full qemu log with xen_platform trace.
> >>>>>>>>
> >>>>>>> xen_platform_log xen platform: XENVIF|SettingsSave: FROM
> >> Ethernet
> >>>>>> (Realtek RTL8139C+ Fast Ethernet NIC)
> >>>>>>> xen_platform_log xen platform: XENVIF|SettingsCopyIpAddresses:
> >>>>>> Version4: ADDRESSES NOT FOUND
> >>>>>>> xen_platform_log xen platform: XENVIF|SettingsCopyIpAddresses:
> >>>>>> Version6: ADDRESSES NOT FOUND
> >>>>>>> xen_platform_log xen platform: XENVIF|DriverRequestReboot:
> >> <===>
> >>>>>>> xen_platform_log xen platform: XENVIF|PdoStartDevice: fail7
> >>>>>>> xen_platform_log xen platform: XENVIF|PdoStartDevice: fail6
> >>>>>>> xen_platform_log xen platform: XENVIF|PdoStartDevice: fail5
> >>>>>>> xen_platform_log xen platform: XENVIF|PdoStartDevice: fail4
> >>>>>>> xen_platform_log xen platform: XENVIF|PdoStartDevice: fail3
> >>>>>>> xen_platform_log xen platform: XENVIF|PdoStartDevice: fail2
> >>>>>>> xen_platform_log xen platform: XENVIF|PdoStartDevice: fail1
> >>>> (c0000001)
> >>>>>>> xen_platform_log xen platform: XENNET|DriverUnload: XENNET
> 8.2.0
> >>>> (31)
> >>>>>> (17.09.2015)
> >>>>>>> That means you have not rebooted to allow the emulated device to
> >> be
> >>>>>> unplugged. Other versions of Windows will prompt for the reboot
> but
> >>>>>> Microsoft broke the class installer in Windows 10 so it won't.
> >>>>>>>       Paul
> >>>>>> Thanks for reply.
> >>>>>> I already did a windows reboot after pv install but after doing
> another
> >>>>>> seem ok.
> >>>>>> Remain the dubt with ahci, I saw both emulated and pv ok in
> windows
> >>>>>> devices manager and I not understand if a changes is needed for ahci
> >>>>>> qemu side as Stefano Stabellini told.
> >>>>>> Can you take a look to this new qemu log please? Is ok or with ahci
> disk
> >>>>>> is not pv correctly?
> >>>>>>
> >>>>> The log shows:
> >>>>>
> >>>>> xen_platform_log xen platform: XENVBD|__ReadDiskInfo:Target[0] :
> >>>> 104857600 sectors of 512 bytes (512)
> >>>>> xen_platform_log xen platform: XENVBD|__ReadDiskInfo:Target[0] :
> 50
> >> GB
> >>>> (00000000)
> >>>>> xen_platform_log xen platform:
> >> XENVBD|FrontendReadDiskInfo:Target[0]
> >>>> : Features: BARRIER FLUSH DISCARD
> >>>>> xen_platform_log xen platform:
> >> XENVBD|FrontendReadDiskInfo:Target[0]
> >>>> : DISCARD 0/1000
> >>>>> xen_platform_log xen platform:
> >> XENVBD|FrontendReadFeatures:Target[0]
> >>>> : Features: PERSISTENT INDIRECT
> >>>>> xen_platform_log xen platform:
> >> XENVBD|FrontendReadFeatures:Target[0]
> >>>> : INDIRECT 100
> >>>>> xen_platform_log xen platform:
> XENVBD|__FrontendSetState:Target[0]
> >> :
> >>>> in state CONNECTED
> >>>>> xen_platform_log xen platform:
> XENVBD|__FrontendSetState:Target[0]
> >> :
> >>>> in state ENABLED
> >>>>> xen_platform_log xen platform: XENVBD|PdoCreate:Target[0] :
> Created
> >>>> (PV)
> >>>>> That last line says you have a functioning PV disk.
> >>>>>
> >>>>>      Paul
> >>>> Thanks for your reply.
> >>>> So with ahci even if Windows sees also emulated one in device
> manager
> >>>> should properly use the pv?
> >>>>
> >>> XENFILT is installed as a filter on the IDE channel class in Windows so 
> >>> that
> it
> >> can make sure that, in the event of an emulated disk being present in the
> >> VM, the PV device does not come online... otherwise you've got two
> disks in
> >> the VM referencing the same storage and you'll get data corruption pretty
> >> quickly.
> >>> So, if you use AHCI, I'm not convinced that:
> >>>
> >>> a) The emulated device unplug code in QEMU will actually unplug the
> >> emulated AHCI disk
> >>> b) XENFILT will spot the problem
> >>>
> >>> Hence, if you see any corruption of the VMs disks I would not be
> surprised.
> >>>
> >>>     Paul
> >> I had disk corruption but with qcow2 disk overlay and also using ide
> >> instead as I reported time ago. Without qcow2 I not saw disk corruption
> >> for sure if I remember good. I saw domUs windows unbootable in other
> >> cases about updated/remove the new pv but also with ide.
> >> Is there a way to check if corruption happen in raw disks even if domU
> >> seems still working correctly?
> >>
> > Go look at the number of disks the VM thinks it has. If you only gave it one
> but it thinks it has two then corruption is imminent.
> >
> >    Paul
> 
> See 2 but one (the emulated as offline), see the screenshot attached.
> In this case can risk corruption or not?

Not sure. That depends on how 'offline' the disk is. The fact you have 2 though 
shows that neither the unplug or the filter are working for AHCI disks, so I'd 
recommend you stick with IDE until those two pieces are updated.

  Paul

> 
> Thanks for any reply and sorry for my bad english.
> 
> 
> 
> >
> >> @ Stefano Stabellini: can you add unplug support for ahci in qemu to be
> >> sure it can't do unexpected things please?
> >>
> >>
> >> If you need more information and/or test tell me and I'l post them.
> >> Thanks for any reply and sorry for my bad english.


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