Bug 20174

Summary: a bug that may slows down the performance of Linux
Product: [Retired] Red Hat Linux Reporter: Need Real Name <tim_hei>
Component: magicdevAssignee: Elliot Lee <sopwith>
Status: CLOSED WORKSFORME QA Contact: David Lawrence <dkl>
Severity: high Docs Contact:
Priority: high    
Version: 7.0   
Target Milestone: ---   
Target Release: ---   
Hardware: i586   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2001-02-08 02:31:06 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Need Real Name 2000-11-02 03:49:57 UTC 
I am using Redhat 7.0 on my pentium II computer with 256M ram. Also, I 
have two SCSI harddisks and 1 IDE CD-Rom Drive. After upgrading from 
Redhat 6.2 to 7.0 , a message always displays on the screen "hda: ATAPI 
40X CD-ROM Drive, 128kb Cache". The screen is full of this text. After I 
press any key then the cursor comes back. I also sometimes need to re-boot 
the computer to restart the installed sendmail service on that computer 
because the computer performance is slow down. Many staff in my company 
complain about the dis-continue of email service.

Where is the source of the bug?
How can I fix it?

Best regards,

Timmy
Comment 1 Bill Nottingham 2000-11-02 06:07:17 UTC 
The IDE CD-ROM message is very likely coming from magicdev.
You may want to consider disabling it.

You should also make sure you're running the latest
updates.
Comment 2 Owen Taylor 2001-02-08 02:31:02 UTC 
I think the performance problems (whatever they are) they are unrelated
to the  messages. The kernel messages are harmless and are generated 
every 10 minutes when /etc/cron.d/kmod removes the module, and then
magicdev reloads it next time it checks for the presence of a
CDROM device. (This check occurs every two seconds.)

It's strange a little that you are getting the kernel messages directed
to your screen - by default, all kernel messages are logged to
syslogd and should show up in /var/log/messages. At a rate
of once every 10 minutes, and considering that syslog removes
duplicate messages, I would not consider this a major problem.

If you do ps auxw | grep klogd, what does that show? It's possible
that klogd is not running on your system for some reason, which
would disable the redirection of error messages.

Did turning off magicdev fix the performance problems?

Thanks,
                                    Owen
Comment 3 Elliot Lee 2001-03-13 23:25:18 UTC 
No reply after more than a month... closing.