Arch Linux

Description:
Kernel versions greater than 3.12.6 cause bug traces to be printed to dmesg when starting certain processes, and sometimes completely freeze X. I'm not sure if its related, but this is happening while running as a Xen dom0. The most common time for this to happen for me is when starting firefox. Firefox will either crash after the windows appear but before webpages in the tabs have finished loading, or X will completely freeze. When X freezes, the system is still accessible through ssh, and any domU VMs still continue to work. In either case, crash or freeze, dmesg contains the same types of errors repeated many times. I have seen this problem with every kernel I've tried greater than 3.12.6, including 3.12.8, 3.12.9, and the current testing 3.13.2-1.

Tomorrow I may try building a vanilla kernel to see if this is an upstream or Arch problem. Let me know if there is any other info I can provide or debugging that would help.

Additional info:
* package version(s)
Working: linux-3.12.6-1
Not working: linux-3.12.8, linux-3.12.9-2, linux-3.13.2-1
Other package versions:
mesa, nouveau-dri: 10.0.3-1, 10.0.2-1
firefox: 26, 27
gnome-shell: 3.10.3-1
xen: 4.3.1

* config and/or log files etc.
bad-page-state-firefox-dmesg-kernel-3.13.2.txt:
This is what showed up in dmesg when firefox 27 was started and then crashed on kernel 3.13.2

bad-page-state-vim-dmesg-kernel-3.13.2.txt
This is what showed up in dmesg when I opened vim immediately after firefox crashed in order to paste the log into it.

Steps to reproduce:
- Upgrade kernel past 3.12.6
- Reboot
- Start GNOME 3 desktop
- Start Firefox
- observe crash or freeze within a minute or less
- view dmesg, through ssh if necessary