Weird problems with CentOS 7.6 1810 installer


I just updated my installation media for CentOS. I have a few sandbox
PCs in my office, and I'm testing CentOS 7.6 1810 on them. There seem to
be a few issues with the CentOS 7.6 1810 DVD.

Checked DVD integrity on startup : OK.

First attempt : installer froze on root password dialog.

Second attempt : installer froze on dependency calculation.

Third attempt : installer froze on network interface definition.

Similar behavior on two different machines.

On the same machine, the minimal DVD seems to work OK.

I could manage to switch to another virtual console, and I have the
following kernel log messages:

WARNING: kernel:perf: interrupt took too long

Any idea what's going on here?

I should add that all the previous CentOS 7 installation DVDs worked
perfectly on these PCs (Dell Optiplex 330).




Re: Weird problems with CentOS 7.6 1810 installer

By Gordon Messmer at 12/05/2018 - 23:29

On 12/4/18 11:03 PM, Nicolas Kovacs wrote:

Can you run "dmesg" and find out if there's any more info?  Often there
will be a kernel stack trace that provides hints as to which module was
handling the interrupt, and therefore which device or driver is at fault.

Re: Weird problems with CentOS 7.6 1810 installer

By Chris Murphy at 12/08/2018 - 18:26

That willl be incredibly verbose, and slows things down a lot, so in the
off chance there's a race, you might get different results. But if not, the
log should contain something useful.

I like the hypothesis about mdadm metadata version 0.9, however that's
still really common on RHEL and CentOS. It was used for /boot prior to
about Fedora around Fedora 24 maybe?

It could also be a dracut bug, since that's what's largely responsible for
assembly. But then it can be confused by a change in udev rules. :-D

However, going back to mdadm 0.9 metadata, that version should only be
kernel auto detected. Theoretically, it gets activated before dracut gets
involved. 1.x versions have no kernel autodetect, instead it happens in
dracut (by calling mdadm to assemble and run it).

Oh, is this really dm-cache, not lvmcache? That might be a source of
confusion, if there isn't lvm metadata present to hint at LVM for proper
assembly. Of course, lvmcache still uses device mapper, but with LVM

Anyway is quite an interesting, and concerning problem.

Chris Murphy

Re: Weird problems with CentOS 7.6 1810 installer

By Simon Matter at 12/10/2018 - 02:47

At least I didn't have any problems on my systems having all metadata
version 1.2, which seems the default for CentOS 7.

Maybe it's a good idea to upgrade those arrays with older metadata before
doing the 7.6 upgrade.


Re: Weird problems with CentOS 7.6 1810 installer

By Stephen John Smoogen at 12/05/2018 - 09:01

On Wed, 5 Dec 2018 at 02:02, Nicolas Kovacs < ... at microlinux dot fr> wrote:
Well the Captain Obvious answer is something hardware related is
taking too long while the system is working out sample loads.
<a href="" title=""></a> It is supposedly an
informational versus the reason the system died.

How much memory do the systems have, what is its CPU, and how many
packages are you installing? [The Dell Optiplex 330 is from 2007 and
came with several different layouts so it might need info.] Finally
does the install work if you only choose what the minimal would