Long Boot times

[Paul Howarth]

On 12/06/2011 04:26 PM, Arthur Dent wrote:
> Hello all,
>
> I have just upgraded my F14 desktop system to F16 (fresh install
> with /home partition maintained from previous Fedora install and some
> config files copied across). Now about 50% of boot times are acceptable
> (sub 1 minute even with a 5s grub delay) and others take around 2
> minutes with a rather alarming black screen for much of that time.
>
> I have no idea if this is caused by SEL, but when i look at dmesg for
> the "slow" boots it shows this at the very end:
>
> ===============8<====================================
> [root at localhost ~]# dmesg
> [       snip ]
> [   32.248789] e1000e 0000:00:19.0: em1: 10/100 speed: disabling TSO
> [   32.248955] ADDRCONF(NETDEV_CHANGE): em1: link becomes ready
> [   42.354015] em1: no IPv6 routers present
> [   90.858903] SELinux: initialized (dev 0:21, type nfs4), uses genfs_contexts
> [   90.863622] SELinux: initialized (dev 0:22, type nfs4), uses genfs_contexts
> [   90.867429] SELinux: initialized (dev 0:23, type nfs4), uses genfs_contexts
> [   90.868787] SELinux: initialized (dev 0:24, type nfs4), uses genfs_contexts
> [   90.872920] SELinux: initialized (dev 0:22, type nfs4), uses genfs_contexts
> [   90.877188] SELinux: initialized (dev 0:25, type nfs4), uses genfs_contexts
> [   90.878883] mount[998]: mount.nfs: /mnt/NFSmark is busy or already mounted
> [   90.887451] SELinux: initialized (dev 0:22, type nfs4), uses genfs_contexts
> [   90.927896] SELinux: initialized (dev 0:21, type nfs4), uses genfs_contexts
> [   90.932400] SELinux: initialized (dev 0:22, type nfs4), uses genfs_contexts
> [   92.714872] [drm:drm_debugfs_create_files] *ERROR* Cannot create /sys/kernel/debug/dri/channel\xfffffff0i\xffffff80]\xffffffc0\x03/3
> [   95.940096] [drm:drm_debugfs_create_files] *ERROR* Cannot create /sys/kernel/debug/dri/channel\xffffffe9i\xffffff80]\xffffffc0\x03/3
> [root at localhost ~]#
>
> ===============8<====================================
> On the successful boots dmesg ends with the "no IPv6 routers present"
> line at around 44s.
>
> Is this even anything to do with SEL?
>
> Even if it isn't, can any of the gurus here suggest how to proceed
> towards fixing it?
>
> I originally thought that this was a NFS mounting problem and posted a
> thread in the Fedora Users list as can be seen here:
> http://lists.fedoraproject.org/pipermail/users/2011-December/409137.html
> but I now think that that was a red-herring.
>
> Thanks in advance for any help or suggestions...

I'd start by removing the "rhgb" and "quiet" options from the boot 
command line (edit /boot/grub2/grub.cfg), which will give you a lot more 
detail about what's going on and may help you to identify where the 
delay is.

Paul.