Quoting Gary Ballantyne (gary.ballant...@haulashore.com): > Hi All > > I have an intermittent, but crippling, problem on a raring EC2 instance > (also on quantal). Its a (raring) lvm-backed container --- I use cgroups > directly (via /sys/fs) and iptables in the instance (not sure if that's > relevant at all). > > Occasionally, when stopping or starting the container (there is just > one), the instance becomes unreachable. Rebooting doesn't help, but > starting/stopping the instance, typically at least twice, fixes things > (the instance is reachable, and the container auto-starts). > > There doesn't appear to be anything sinister in /var/log/dmesg (upon > restart), but the AWS system log is pasted below. I *think* the first > part corresponds to before the crash, and the interesting bit is: > > [3587596.471053] ------------[ cut here ]------------ > [3587596.471071] Kernel BUG at ffffffff816c7c2c [verbose debug info > ... > [3587596.472282] ---[ end trace dc5c4320e1320f1d ]--- > [3587596.472292] Fixing recursive fault but reboot is needed!
Looks to me like the problem is a conflict between memory cgroup and xen: [3587596.472052] [<ffffffff8100508c>] ? xen_mc_extend_args+0xfc/0x120 [3587596.472061] [<ffffffff816c827b>] do_page_fault+0x2b/0x50 [3587596.472068] [<ffffffff816c4818>] page_fault+0x28/0x30 [3587596.472076] [<ffffffff81187c24>] ? mem_cgroup_charge_statistics.isra.20+0x14/0x50 [3587596.472085] [<ffffffff81189cd0>] __mem_cgroup_uncharge_common+0xd0/0x2d0 [3587596.472093] [<ffffffff8118d21a>] mem_cgroup_uncharge_page+0x2a/0x30 If you have your System.map file, or even better yet if you objdump -d your uncompressed vmlinux, you should be able to figure out more about what is going on at those locations. You don't say what distro/kernel version you have, but you also might google on these functions, or check the git logs for recent changes/ fixes. -serge ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_mar _______________________________________________ Lxc-users mailing list Lxc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lxc-users