[CRIU] Fwd: Criu Restore Error

[Christopher Covington]

On 03/26/2015 12:13 AM, Priyanka Naik wrote:
> Would the settings done while kernel recompilation wipe out my previous settings?

They shouldn't. What I usually do is run `make menuconfig` and then hit "/"
and type in each option to see where it's located in the menu and what
settings it depends on that aren't already enabled. Then I go through the
dependencies and configuration options and turn them on. Then I save the
.config and build the kernel.

I also have a checker script to make sure the CRIU settings (and others I'm
interested like Android) are turned on. I could probably share that if anyone
was interested. It just greps the .config for the settings listed on the wiki.
CRIU has the run-time `criu check` which does essentially the same thing in a
more versatile way (it doesn't need a .config or /proc/config.gz).

Chris


> On Wed, Mar 25, 2015 at 11:15 PM, Christopher Covington <cov at codeaurora.org
> <mailto:cov at codeaurora.org>> wrote:
> 
>     On 03/25/2015 01:33 PM, Christopher Covington wrote:
>     > Hi Priyanka,
>     >
>     > On 03/25/2015 01:16 PM, Priyanka Naik wrote:
>     >> priyanka at priyanka-Lenovo-G510:~$ sudo mount -t 9p -o
>     >> trans=virtio,version=9p2000.L hostshare /tmp/host_files
>     >> mount: wrong fs type, bad option, bad superblock on hostshare,
>     >>        missing codepage or helper program, or other error
>     >>        (for several filesystems (e.g. nfs, cifs) you might
>     >>        need a /sbin/mount.<type> helper program)
>     >>        In some cases useful info is found in syslog - try
>     >>        dmesg | tail  or so
>     >
>     > Try it from inside the guest.
> 
>     Oh I forgot these aren't on by default--make sure the following kernel config
>     options are set:
> 
>     CONFIG_NET_9P=y
>     CONFIG_NET_9P_VIRTIO=y
>     CONFIG_9P_FS=y
> 
>     http://wiki.qemu.org/Documentation/9psetup#Preparation
> 
>     Or load the corresponding modules if you've got them configured as modules.
> 
>     Chris
> 
>     >> On Wed, Mar 25, 2015 at 10:42 PM, Christopher Covington
>     <cov at codeaurora.org <mailto:cov at codeaurora.org>
>     >> <mailto:cov at codeaurora.org <mailto:cov at codeaurora.org>>> wrote:
>     >>
>     >>     On 03/25/2015 01:00 PM, Priyanka Naik wrote:
>     >>     > This command ran successfully. Now how to access files from guest??
>     >>
>     >>     http://www.linux-kvm.org/page/9p_virtio
>     >>
>     >>     mkdir /tmp/host_files
>     >>     mount -t 9p -o trans=virtio,version=9p2000.L hostshare /tmp/host_files
>     >>
>     >>     > Another thing while accessing those files does my guest need to
>     be shutdown??
>     >>
>     >>     I don't. It's based on a network filesystem.
>     >>
>     >>     Chris
>     >>
>     >>     > On Wed, Mar 25, 2015 at 10:15 PM, Christopher Covington
>     <cov at codeaurora.org <mailto:cov at codeaurora.org> <mailto:cov at codeaurora.org
>     <mailto:cov at codeaurora.org>>
>     >>     > <mailto:cov at codeaurora.org <mailto:cov at codeaurora.org>
>     <mailto:cov at codeaurora.org <mailto:cov at codeaurora.org>>>> wrote:
>     >>     >
>     >>     >     On 03/25/2015 12:25 PM, Priyanka Naik wrote:
>     >>     >     >
>     >>     >     > ---------- Forwarded message ----------
>     >>     >     > From: *Priyanka Naik* <prnk.nk1 at gmail.com
>     <mailto:prnk.nk1 at gmail.com> <mailto:prnk.nk1 at gmail.com
>     <mailto:prnk.nk1 at gmail.com>> <mailto:prnk.nk1 at gmail.com
>     <mailto:prnk.nk1 at gmail.com>
>     >>     <mailto:prnk.nk1 at gmail.com <mailto:prnk.nk1 at gmail.com>>>
>     <mailto:prnk.nk1 at gmail.com <mailto:prnk.nk1 at gmail.com>
>     >>     <mailto:prnk.nk1 at gmail.com <mailto:prnk.nk1 at gmail.com>>
>     >>     >     <mailto:prnk.nk1 at gmail.com <mailto:prnk.nk1 at gmail.com>
>     <mailto:prnk.nk1 at gmail.com <mailto:prnk.nk1 at gmail.com>>>>>
>     >>     >     > Date: Wed, Mar 25, 2015 at 9:54 PM
>     >>     >     > Subject: Re: [CRIU] Criu Restore Error
>     >>     >     > To: Christopher Covington <cov at codeaurora.org
>     <mailto:cov at codeaurora.org>
>     >>     <mailto:cov at codeaurora.org <mailto:cov at codeaurora.org>>
>     <mailto:cov at codeaurora.org <mailto:cov at codeaurora.org>
>     >>     <mailto:cov at codeaurora.org <mailto:cov at codeaurora.org>>>
>     <mailto:cov at codeaurora.org <mailto:cov at codeaurora.org>
>     >>     <mailto:cov at codeaurora.org <mailto:cov at codeaurora.org>>
>     >>     >     <mailto:cov at codeaurora.org <mailto:cov at codeaurora.org>
>     <mailto:cov at codeaurora.org <mailto:cov at codeaurora.org>>>>>
>     >>     >     >
>     >>     >     >
>     >>     >     > I got these errors after running following command :
>     >>     >     >
>     >>     >     > root at priyanka-Lenovo-G510:/usr/bin# qemu-system-x86_64 -m
>     1024 -s -hda
>     >>     >     > vdisk.img -kernel
>     /usr/src/linux-3.17.6/arch/x86_64/boot/bzImage
>     >>     -initrd
>     >>     >     > /home/priyanka/tmp2/newinitrd.img -append "root=/dev/sda10"
>     -name
>     >>     myguest
>     >>     >     > -device virtio-serial -chardev
>     >>     socket,path=/tmp/foo,server,nowait,id=foo
>     >>     >     > -device
>     virtserialport,chardev=foo,name=org.fedoraproject.port.0
>     >>     -fsdev
>     >>     >     > local,security_model=passthrough,id=fsdev0,path=/tmp/share
>     -device
>     >>     >     > virtio-9p-pci,id=fs0,fsdev=fsdev0,mount_tag=hostshare
>     >>     >     >
>     >>     >     >
>     >>     >     > qemu-system-x86_64: -device
>     >>     >     > virtio-9p-pci,id=fs0,fsdev=fsdev0,mount_tag=hostshare:
>     Virtio-9p
>     >>     Failed to
>     >>     >     > initialize fs-driver with id:fsdev0 and export path:/tmp/share
>     >>     >
>     >>     >     This fixed this error for me:
>     >>     >
>     >>     >     mkdir /tmp/share
>     >>     >
>     >>     >     Note that this is a host machine path.
>     >>     >
>     >>     >     Chris

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