CentOS virt - Nov 2015 - 3.18.21-16 upgrade, kernel panic, unable to mount root fs

I have released to the master mirror the following packages for Xen4CentOS:

b518e3b0fd4f735b34d7784815793cb787283d9029776bd9794cedeb274b9204 
kernel-3.18.21-16.el6.x86_64.rpm

4b17373a0ef6806b26d02eb87fc299020beb60b6e31ed08a9c57d30a1410fbe7 
kernel-devel-3.18.21-16.el6.x86_64.rpm

cacedf6771849f7525145ad4ed7d36a2cad5b49b546173bb7c132b236cb7ac49 
kernel-doc-3.18.21-16.el6.noarch.rpm

22479ee9c2d3748edb08b410514d12c17ad966bcc2c067c48deedf732ae62aae 
kernel-firmware-3.18.21-16.el6.noarch.rpm

5d7cd57276f8755c8c312149888956f230ed356bc753117365b4ad7df7b1bf69 
kernel-headers-3.18.21-16.el6.x86_64.rpm

99f65bb828a4d1f9ee25c77d0c71b3d88eba93fcf3fb0babf6c10379d426e5b3 
perf-3.18.21-16.el6.x86_64.rpm

616a1fd6689f214f10dce7b70eb1984e60371edb8341140ddd0b4850fa9705de 
xen-4.4.3-3.el6.x86_64.rpm

2a9584266af525126e7b6a2fa2eeac3757aa63bc6636a8393e0b65e6f4694a42 
xen-devel-4.4.3-3.el6.x86_64.rpm

4ac658cd679ba54496ea82e018ec89156620b2e4c93ef93c3afcfd0956b22f9e 
xen-doc-4.4.3-3.el6.x86_64.rpm

ebfd368aa03a16a1c943afbda8795b631a88a800edcb0650903620928264ab48 
xen-hypervisor-4.4.3-3.el6.x86_64.rpm

c2fa54596923d000e32cd5e96982a06b95ac9a9d1c20655ea3371d44620a2f0e 
xen-libs-4.4.3-3.el6.x86_64.rpm

a2481c5a3e55d20028f90c1b44195cfb64f22a34f9956ee67ce3a7d1bd9a24ea 
xen-licenses-4.4.3-3.el6.x86_64.rpm

283a3052c17735103aef249b3c183b5d9781f76f110dff3d585425af276d0e50 
xen-ocaml-4.4.3-3.el6.x86_64.rpm

f2058a63167d3f0781ab71267b7c10132b18c836d7d4d8bd78214d88d930f5e3 
xen-ocaml-devel-4.4.3-3.el6.x86_64.rpm

43ed7df8e5fb1e836e84f3c517726a6f0512ac6afbbc2eec4af76a39a8cb9eae 
xen-runtime-4.4.3-3.el6.x86_64.rpm

These changelog entries are applicable for the new kernel compared to
the previously released version:
https://cdn.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.21
https://cdn.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.20
https://cdn.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.19
https://cdn.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.18

The xen updates roll in:

* Thu Oct 29 2015 George Dunlap <george.dunlap at citrix.com> -
4.4.3-3.el6.centos
- Update fix for XSA-150

 * Thu Oct 22 2015 George Dunlap <george.dunlap at citrix.com> -
4.4.3-2.el6.centos
 - Import XSAs 149-153

Thanks,
Johnny Hughes


-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 198 bytes
Desc: OpenPGP digital signature
URL:
<http://lists.centos.org/pipermail/centos-virt/attachments/20151029/16091cdc/attachment-0002.sig>

Hi, just a heads-up: 3.18.21 didn't boot up on HP ML310e Gen8 v2, SATA 
drives in AHCI mode, / on software raid 1, no LVM. It ended up in kernel 
panic with unable to mount root fs. Attached. No difference in grub 
kernel/xen settings.

I didn't investigate the things deeper so far. 4.4.3-3/3.18.17 is 
booting fine.

Any similar experience?

BR
--
Karel
-------------- next part --------------
A non-text attachment was scrubbed...
Name: crash.png
Type: image/png
Size: 8747 bytes
Desc: not available
URL:
<http://lists.centos.org/pipermail/centos-virt/attachments/20151101/50577b75/attachment.png>

On 11/01/2015 12:07 PM, Karel Hendrych wrote:
> Hi, just a heads-up: 3.18.21 didn't boot up on HP ML310e Gen8 v2, SATA
drives in AHCI mode, / on software raid 1, no LVM. It ended up in kernel panic
> with unable to mount root fs. Attached. No difference in grub kernel/xen
settings.
> 
> I didn't investigate the things deeper so far. 4.4.3-3/3.18.17 is
booting fine.
> 
> Any similar experience?
Check the module line for the initramfs is present in grub.conf. It's gone
missing in all our recent upgrades, but I wasn't sure if it was an upstream
problem or our own.