Xen project Mailing List

Hi,

On Wed, Jun 3, 2015 at 5:20 PM, Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx> wrote:

On Wed, 3 Jun 2015, Sanjeev Pandita wrote:
> Hi Stefano,
>
> On Wed, Jun 3, 2015 at 3:45 PM, Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx> wrote:
> On Wed, 3 Jun 2015, Sanjeev Pandita wrote:
> > On Tue, Jun 2, 2015 at 7:55 PM, Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx> wrote:
> > On Tue, 2 Jun 2015, Sanjeev Pandita wrote:
> > > From: Stefan Bader [mailto:stefan.bader@xxxxxxxxxxxxx]
> > > Sent: Tuesday, June 02, 2015 1:52 PM
> > > To: Sanjeev Pandita; xen-devel@xxxxxxxxxxxxx
> > > Cc: Ian.Campbell@xxxxxxxxxx; Pranavkumar Sawargaonkar;
> > > stefano.stabellini@xxxxxxxxxxxxx
> > > Subject: Re: [Xen-devel] ARM64: XEN Domu not booting with the qemu qcow
> > > AARCH64 Ubuntu 15.04 disk
> > >
> > > On 02.06.2015 09:40, Sanjeev Pandita wrote:
> > > > All,
> > > >
> > > > I am pretty new to xen . I am trying to boot DOMU with qemu qcow
> > > > AARCH64 Ubuntu 15.04 disk on Xen but I am getting the errors which
> > > > link to "/usr/local/lib/xen/bin/qemu-system-i386".
> > > > Since I am working on aarch64 system the
> > > > /usr/local/lib/xen/bin/qemu-system-i386 bin might not be present or
> > > > might not work as expected.
> > >
> > > Because I am lacking hardware and feedback, the arm64 packaging is a
> > > rather theoretical exercise. At least for armhf I thought qemu-system-x86
> > > was a dependency. That binary should provide x86 emulation on arm64, the
> > > same as one could install qemu for other arches on x86.
> > > Have you tried to install qemu-system-x86 manually?
> > >
> > > -Stefan
> > >
> > > >
> > > > Please let me know how to make the Qemu qcow image work on Xen.
> > > > Attached are the DomU boot log and config file.
> > > >
> > > > Thanks,
> > > > San
> > >
> > > Thanks for your inputs, I have installed the qemu-system-i386 but my DomU
> > > booting is still crashing with following short logs. Am I missing anything
> > > ?
> > >
> > > Kernel Crash logs:
> > >
> > > xenbus_probe_frontend: Waiting for devices to initialise:
> > > 25s...20s...15s...10s...5s...0s...
> > > 235s...230s...225s...220s...215s...210s...205s...200s...195s...190s...185s
> > > ...180s...175s...170s...165s...160s...155s...150s...145s...140s...135s...1
> > > 30s...125s...120s...115s...110s...105s...100s...95s...90s...85s...80s...75
> > > s...70s...65s...60s...55s...50s...45s...40s...35s...30s...25s...20s...15s.
> > > ..10s...5s...0s...
> > >
> > > xenbus_probe_frontend: Timeout connecting to device: device/vbd/51712
> > > (local state 3, remote state 2)
> > > console [netcon0] enabled
> > > netconsole: network logging started
> > > drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
> > > VFS: Cannot open root device "xvda" or unknown-block(0,0): error -6
> > > Please append a correct "root=" boot option; here are the available
> > > partitions:
> > > Kernel panic - not syncing: VFS: Unable to mount root fs on
> > > unknown-block(0,0)
> > > CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.19.8 #5
> > > Hardware name: XENVM-4.6 (DT)
> > > Call trace:
> > > [<ffffffc00008a0dc>] dump_backtrace+0x0/0x124
> > > [<ffffffc00008a210>] show_stack+0x10/0x1c
> > > [<ffffffc000657d88>] dump_stack+0x80/0xc4
> > > [<ffffffc000656f04>] panic+0xe0/0x220
> > > [<ffffffc00087eea8>] mount_block_root+0x1a4/0x24c
> > > [<ffffffc00087f19c>] mount_root+0x110/0x130
> > > [<ffffffc00087f328>] prepare_namespace+0x16c/0x1b8
> > > [<ffffffc00087eb44>] kernel_init_freeable+0x1c4/0x1ec
> > > [<ffffffc00065481c>] kernel_init+0xc/0xd8
> > > ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on
> > > unknown-block(0,0)
> >
> > It looks like the backend (QEMU) hasn't been initialized properly.
> > Could you please post the output of xenstore-ls? Also could you run ps
> > aux|grep qemu to check whether QEMU was spawned correctly?
> >
> >
> > Attaching output of xenstore-ls and grep qemu.
> > Looks like qemu process is getting spawned and running fine.
> >
> > I have also modified the config file to remove tap from disk like:
> > disk = [ 'qcow:/mnt/xen/vivid-server-cloudimg-arm64-disk1.img,xvda,w' ]
> > But still my DOMU booting is stuck and getting crashed due to lack of rootfs/disk.
> >
> > I am running this on mustang board.
>
> QEMU has been spawn correctly, and I can see that it changed the
> backend state to "2" (/local/domain/0/backend/qdisk/1/51712 in xenstore).
>
> Similarly the frontend initialization has started as the frontend state
> has been changed to "3".
>
> However they should be both "4". So unless you manage to capture a
> transient state, the communication between frontend and backend got
> stuck. I don't know why.
>
> Is there anything interesting in the QEMU logs (under /var/log/xen) ?
>
>
>
> I checked /var/log/xen. Here is the error message.
>
> linux:/var/log/xen # cat qemu-dm-vm4.log
> xen be: qdisk-51712: error: 'xvda' uses a qcow feature which is not supported by this qemu version: QCOW version 2
> xen be: qdisk-51712: initialise() failed

All right, maybe you just need to specify:

disk = ['tap:qcow2:/mnt/xen/vivid-server-cloudimg-arm64-disk1.img,xvda,w']

?

qcow2 is working fine on Mustang :).

Sorry for the delayed reply .

Thanks for helping me out.

Regards,

Sanjeev

Re: [Xen-devel] ARM64: XEN Domu not booting with the qemu qcow AARCH64 Ubuntu 15.04 disk