FC4 - a couple of slowness issues.

[Stephen Smalley]

On Wed, 2006-08-16 at 21:10 -0400, William W. Austin wrote:
> I have a machine which was running FC4, and I installed FC5 on it.
> 
> Same disks (3 sata, 320GB/sata3 on promise card, and 2 240GB/sata1 on
> onboard sata (sata_sil driver; 1 160GB eide drive on on-board mb
> controller).  Same other H/W, same computer.  Nothing changes.  (athlon  
> 2500xp+, 2gb ram, scsi tape and scanner - no scsi drives on this box).
> 
> If I boot back to FC4, the problems go away - if I boot FC5, they
> occur.
> 
> I have searched both the list and bugzilla but I guess I have not done  
> a great job because I found a few 'sorta' similar problems but not  
> these two in partiular - if I missed it and it is there, sorry to waste  
> the bandwidth.
> 
> Problem 1: firefox CRAWLS.  Mozilla, galeon, epiphany and konqueror ALL
> load web pages, images, etc. far faster.  Time comparison for loading a
> local web page (fairly straightforward - text and jpeg images mixed -
> but rather large) takes under a second with any of the other browsers,
> and takes over 20 seconds with firefox.  If I boot back to FC4 and run  
> 1.0.8.1-1.fc4 it runs essentially the same speed as the other browsers.
> I collect astronomy images (primarily very large tiff images), and the  
> download time delays are short with the other browsers (FC5) but often  
> more than 15 seconds BEFORE the download starts with firefox.  If I  
> boot back to FC4, the problem goes away.
> 
> Problem 2:  I cannot burn a dvd (typical command cdrecord  
> --dev=/dev/hdc -v -dao -data XYZ.iso) without getting MANY underruns -  
> about 13 on a DVD with 3GB of data on it.  Boot back to FC4 and the  
> problem goes away.
> 
> The ONLY major difference is that I went ahead and enabled selinux on  
> the machine when installing FC5, whereas in FC4 I did not (I also have  
> a dedicated firwall box which theoretically eliminates the need for  
> selunx, but I wanted to try it).
> 
> So my question is, are these problems (a) known, or (b) peculiar to  
> selinux, and/or (c) does anybody have a suggestion for a solution?

- Is your FC5 fully updated?
- Are you getting any avc messages in your /var/log/messages file
or /var/log/audit/audit.log file (the former if not running auditd, the
latter if running it)?

-- 
Stephen Smalley
National Security Agency