Re: [nVMX] With 3.20.0-0.rc0.git5.1 on L0, booting L2 guest results in L1 *rebooting*

["Radim Krčmář" <rkrcmar@redhat.com>]

2015-02-19 23:28+0100, Kashyap Chamarthy:
> On Thu, Feb 19, 2015 at 10:10:11PM +0100, Kashyap Chamarthy wrote:
> > On Thu, Feb 19, 2015 at 05:02:22PM +0100, Radim Krčmář wrote:
> 
> [. . .]
> 
> > > Can you try if the following patch works?
> > 
> > Sure, will test a Kernel built with the below patch and report back.
> 
> Hmm, I'm stuck with a meta issue.
> 
> I checked out the KVM tree[1] on L0, applied your patch and built[*] the
> Kernel, and booted into it. Boot fails and drops into a dracut shell on
> because:
> 
>  . . .
>  dracut-initqueue[3045]: Warning: Cancelling resume operation. Device not found.
>  [ TIME ] Timed out waiting for device
>  dev-ma...per910\x2d\x2d02\x2droot.device.
>  [DEPEND] Dependency failed for /sysroot.
>  [DEPEND] Dependency failed for Initrd Root File SyWarning:
>  /dev/disk/by-uuid/4ccddb2d-4d63-4fce-b4d4-9b2f119a30cc does not exist
>  . . .
> 
> I saved the report from /run/initramfs/rdsosreport.txt here[2].
> 
> 
> Then, I did another test:
> 
>   - Rebooted into Kernel 3.20.0-0.rc0.git5.1.fc23.x86_64 on physical
>     host (L0).
>   - In L1, checked out the KVM tree, applied your patch and built
>     Kernel[*] from the current KVM tree and booted into the newly built
>     one, here too, I'm thrown into a dracut shell

Weird, but considering that boot fails on L0 as well, I think it that
basing off a different commit could help ...

> [1] git://git.kernel.org/pub/scm/virt/kvm/kvm.git
> [2] https://kashyapc.fedorapeople.org/temp/kernel-boot-failure.txt
> 
> [*] Exactly, I built it this way:
> 
>   # Clone the tree
>   $ git://git.kernel.org/pub/scm/virt/kvm/kvm.git
> 
>   # Make a new branch:
>   $ git checkout -b nvmx_test
>   $ git describe
>   warning: tag 'for-linus' is really 'kvm-3.19-1' here
>   for-linus-14459-g49776d5

Hm, it should say v3.19 -- does it stay the same if you do
`git fetch && git checkout origin/master`?

If it still does, please try to apply it on top of `git checkout v3.18`.
(The one that one failed too.)

>   # Make a config file
>   $ make defconfig

It would be safer to copy the fedora config (from /boot) to .config and
do `make olddefconfig`.

>   # Compile
>   $ make -j4 && make bzImage && make modules
>   
>   # Install
>   $ sudo -i
>   $ make modules_install && make install
> 
> -- 
> /kashyap