On 05/28/2014 02:01 AM, Vratislav Podzimek wrote:
On Tue, 2014-05-27 at 12:53 -0400, Gene Czarcinski wrote:
I am having a problem with anaconda-yum hanging with 100% VCPU (my last
hang lasted 100 minutes before I gave up and reset):
https://bugzilla.redhat.com/show_bug.cgi?id=1101544
The problem is very unpredictable because it does not always happen and
my current attempt seems to be running to completion.
1. qemu-kvm virtual systems with 2 VCPUs, 2GB memory and 8GB virtual disk.
2. The input is a DVD iso (created by mock/pungi) based on the5/26/2014
version of rawhide.
3. Install LXDE desktop on regular partitions with ext4.
4. Boot the DVD iso with "inst.debug=1 extlinux" and the command line.
When it hangs, it is somewhere is anaconda-yum. Any tips on how to
debug this? Although anaconda-yum is python code, it runs as a separate
process outside of the regular anaconda so I am uncertain as to how to
approach debugging.
I'd try strace or gdb via gdb-server running in the installation
environment (is available) and gdb+debuginfos on a rawhide machine.
This is going to be a difficult (known) problem. See:
https://bugzilla.redhat.com/show_bug.cgi?id=1101544
If you use ptrace, it runs to completion. If you wait until it hangs
and use strace, it shows nothing. I think I will let the experts handle
this one.
Gene
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