Bug#922653: irqbalance: restart loop when running under runit and with a single CPU

[Mathieu Mirmont <mat@parad0x.org>]

Package: irqbalance
Version: 1.5.0-3
Severity: normal
Tags: patch

Hi,

While testing something else in a virtual machine I noticed that
irqbalance exits if it detects a single CPU. When running under runit
the service is continuously restarted.

I would suggest detecting this case directly from the run script and
stopping the service with sv, something like this:

------------------------------------------------------------
#!/bin/sh
if test $(nproc) = 1; then
   echo "Not starting irqbalance: only one CPU detected"
   sv stop .
   exit 0
fi
exec /usr/sbin/irqbalance --foreground
------------------------------------------------------------

Cheers,

Mat.


-- System Information:
Debian Release: buster/sid
  APT prefers testing
  APT policy: (500, 'testing'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.19.0-1-amd64 (SMP w/8 CPU cores)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8) (ignored: LC_ALL set to C.UTF-8), LANGUAGE=C.UTF-8 (charmap=UTF-8) (ignored: LC_ALL set to C.UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: runit (via /run/runit.stopit)

Versions of packages irqbalance depends on:
ii  debconf [debconf-2.0]  1.5.70
ii  libc6                  2.28-6
ii  libcap-ng0             0.7.9-2
ii  libglib2.0-0           2.58.3-1
ii  libncursesw6           6.1+20181013-1
ii  libnuma1               2.0.12-1
ii  libsystemd0            240-5
ii  libtinfo6              6.1+20181013-1
ii  lsb-base               10.2018112800
ii  runit-helper           2.8.4

irqbalance recommends no packages.

irqbalance suggests no packages.

-- debconf information:
  irqbalance/oneshot: false
  irqbalance/enable: true