[Bug 369550] [NEW] /etc/init.d/virtualbox-ose wastes 10 seconds with find /lib/modules

[Marius Gedminas]

Public bug reported:

Binary package hint: virtualbox-ose

bootchart shows me that /etc/rc2.d/S20virtualbox-ose spends 10 seconds
doing disk I/O in find.  I see this in the init script:

                if ! find /lib/modules/`uname -r` -name "vboxdrv\.*" 2>/dev/null
|grep -q vboxdrv; then
                    failure "No suitable module for running kernel found"
                fi
                if ! rm -f $DEVICE; then
                    failure "Cannot remove $DEVICE"
                fi
                if ! modprobe vboxdrv > /dev/null 2>&1; then
                    failure "modprobe vboxdrv failed. Please use 'dmesg' to find
 out why"
                fi

The sole purpose of that costly operation is to print a slightly more
informative error message in case modprobe should fail.

I would suggest using 'modprobe -n -q vboxdrv' instead of find.
Experiments show it takes only 1 second:

$ echo 3 |sudo tee /proc/sys/vm/drop_caches
3

$ time modprobe -n -q vboxdrv
real	0m0.995s
user	0m0.004s
sys	0m0.000s

$ time find /lib/modules/`uname -r` -name "vboxdrv\.*" 2>/dev/null|grep -q vboxdrv
real	0m12.979s
user	0m0.036s
sys	0m0.076s

ProblemType: Bug
Architecture: i386
DistroRelease: Ubuntu 9.04
Package: virtualbox-ose 2.1.4-dfsg-1ubuntu3
ProcEnviron:
 LC_CTYPE=lt_LT.UTF-8
 PATH=(custom, user)
 LANG=lt_LT.UTF-8
 SHELL=/bin/bash
SourcePackage: virtualbox-ose
Uname: Linux 2.6.28-11-generic i686

** Affects: virtualbox-ose (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386

-- 
/etc/init.d/virtualbox-ose wastes 10 seconds with find /lib/modules
https://bugs.launchpad.net/bugs/369550
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.

-- 
ubuntu-bugs mailing list
ubuntu-bugs at lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs