Bug#766092: systemd: Boot hangs indefinitely

[Michael Biebl]

Control: tags -1 moreinfo

On Tue, 21 Oct 2014 04:46:45 +0200 Michael Biebl <biebl at debian.org> wrote:
> Am 21.10.2014 um 02:19 schrieb Marcelo Laia:
> > On 21/10/14 at 01:07am, Michael Biebl wrote:
> >> How long did you wait?
> > 
> > no limit! Indefinitely
> > 
> 
> Could you check your /tmp (and /var/tmp) directory if it contains a
> large amount of symlinks (created by cups) or files.

Thomas, Marcelo, can you please answer that question?

I did some tests today, creating 1 million test files in /tmp (/tmp
being on a ext4 file system).
Even on my fast SSD, an ls -l /tmp took quite a bit of time.

During boot, the systemd-tmpfiles job needed about 2 mins to clean up
the directory.
I also tested booting with sysvinit, and it took about the same time to
clean up /tmp.

Therefor I don't suspect a bug in systemd, but it rather looks like and
ineffeciency/limitation of the file system when dealing with huge amount
of files in one directory.

If you even had more files in /tmp and maybe you have an HDD, it's very
well possible, that systemd-tmpfiles will need several minutes.
That's why I wanted to know, how long you let the systemd-tmpfiles job  run.

You might be affected by [1]. We also heard reports that google chrome
beta was responsible for creating a huge amount of tmp files.

Michael

[1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=764253
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