[Lxc-users] Kernel panics, out of RAM, provisioning lxc guests and host

[Dan Kegel]

I had, I shit you not, 1.1 million pipes in /tmp in the overlay directory.
Wonder if that stressed anything out.

On Thu, Sep 6, 2012 at 2:27 PM, Dan Kegel <dank at kegel.com> wrote:
> This is more a newbie note to self than anything else.
>
> Twice now, I've gotten a kernel panic while using lxc on precise 12.04.1
> inside virtualbox.  It seems to happen when there's lots of disk I/O going
> on - probably I'm running out of memory, or something.
> The workload is "build large closed-source package and run its unit tests".
> The first time I ran out of memory, I switched the overlay directory
> to be a real directory
> (well, in virtualbox) instead of in tmpfs, and that helped; I get a lot further.
> Oddly, in the outer vm, although df reports there is disk space, I wasn't
> able to write to disk; it reported 'out of space'.
>
> The kernel panic had 'forget_original_parent' in it, I think, and
> a little googling makes me think the kernel panic itself is not
> very informative.
>
> Time to overprovision!  I'm going to give the poor virtualbox client
> an extra gigabyte of RAM and see if that helps.