Arch Linux

emeres

Member

Registered: 2013-10-08

Posts: 1,570

Re: grub-mkconfig takes too long

Yes, it takes several minutes between "No volume groups found" and "Found Gentoo Base System release 2.2 on /dev/sda2".

Which os-prober is responsible for. Are you certain you have the latest os-prober package? Check the binary it has 166* lines, pretty well formatted.

Edit:* plus 285 from /usr/share/os-prober/common.sh plus several others in /usr/lib/os-probe*.

Is there anything unique about your setup? Do you use lvm or raid?

Edit: The lvm question seems futile after 'no volume groups found' message.

Last edited by emeres (2014-08-07 10:50:18)

joseribeiro

Member

Registered: 2013-02-17

Posts: 73

Re: grub-mkconfig takes too long

My sytem is up to date.

# pacman -Q| grep os-prober
os-prober 1.58-1

The lines of os-prober files:

# wc -l /usr/bin/os-prober 
166 /usr/bin/os-prober

# wc -l /usr/share/os-prober/common.sh 
285 /usr/share/os-prober/common.sh

# wc -l /usr/lib/os-prober/newns 
18 /usr/lib/os-prober/newns

# wc -l /usr/lib/os-probes/50mounted-tests 
93 /usr/lib/os-probes/50mounted-tests

# wc -l /usr/lib/os-probes/init/10filesystems 
39 /usr/lib/os-probes/init/10filesystems

# wc -l /usr/lib/os-probes/mounted/*
     70 /usr/lib/os-probes/mounted/05efi
     23 /usr/lib/os-probes/mounted/10freedos
     21 /usr/lib/os-probes/mounted/10qnx
     30 /usr/lib/os-probes/mounted/20macosx
    115 /usr/lib/os-probes/mounted/20microsoft
     33 /usr/lib/os-probes/mounted/30utility
     48 /usr/lib/os-probes/mounted/40lsb
     16 /usr/lib/os-probes/mounted/70hurd
     28 /usr/lib/os-probes/mounted/80minix
     35 /usr/lib/os-probes/mounted/83haiku
    138 /usr/lib/os-probes/mounted/90linux-distro
     19 /usr/lib/os-probes/mounted/90solaris

# wc -l /usr/lib/os-probes/mounted/efi/*
  24 /usr/lib/os-probes/mounted/efi/10elilo
  28 /usr/lib/os-probes/mounted/efi/20microsoft

emeres

Member

Registered: 2013-10-08

Posts: 1,570

Re: grub-mkconfig takes too long

You do not have to count them, I just indicated it is not that much to read, but apparently it is, because of recursions. One of the commands/functions stalls the rest, the goal now should be to determine which one or at least which part of code. You could do that by setting break/information points, across the relevant files. Simply setting echo abstract-name between steps, will get you informed what part is being executed and how long it takes, echo could be used with date. Exit within functions could be also used. There might be internal logging features as well.

Edit: Just be careful, since you would need to run this as root.

Last edited by emeres (2014-08-06 23:43:35)

joseribeiro

Member

Registered: 2013-02-17

Posts: 73

Re: grub-mkconfig takes too long

I am not able to do that...

Last edited by joseribeiro (2014-08-11 23:25:24)

emeres

Member

Registered: 2013-10-08

Posts: 1,570

Re: grub-mkconfig takes too long

You should have made a new post, there are too many threads to keep eye on every one of them. Any progress? I guess recent updates, should there have been any, did not improve the situation?

joseribeiro

Member

Registered: 2013-02-17

Posts: 73

Re: grub-mkconfig takes too long

No improvements.

emeres

Member

Registered: 2013-10-08

Posts: 1,570

Re: grub-mkconfig takes too long

Try something like this. Run it directly, not through grub-mkconfig. Determine which part takes most time.