[OE-core] "qemu-arm udevadm hwdb --update" eats swap space after build host update to openSUSE 13.2

[Richard Purdie]

On Tue, 2014-12-16 at 09:36 +0100, Steffen Sledz wrote:
> On 15.12.2014 17:19, Enrico Scholz wrote:
> > Steffen Sledz <sledz-mQBY8sqGERgRVMum7q6B+Q at public.gmane.org> writes:
> > 
> >> The first thing we observed was that the do_rootfs stage made a very
> >> big load (more than 500) on the machine but the cpu's aren't working
> >> for 100%. I could track down the problem to the call
> >> ...
> >> which eats swap space without end till the system crashes (more than 100GB swap space ist available).
> >>
> >> I've no idea how to inspect this problem further. Any ideas?
> > 
> > I had a similar issue when /var/tmp in the rootfs was an absolute symlink
> > pointing to toplevel /var/tmp which contained some millions of files.
> > 
> > Can you look (lsof) which files are open by qemu?
> 
> Crazy! This really seems to be the problem.
> 
> I had a big subtree from earlier local openSUSE Build Service runs below toplevel /var/run. After deleting this the build succeeds.
> 
> But manually deleting such files before running OE builds cannot really be a reasonable solution. :(

Agreed, we need to figure out which tool is suffering issues with
circular symlinks, then fix that tool. Its not so much a problem with
the core build system as the tools we're using though :(

Cheers,

Richard