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-   -   kupdated? kswapd? (https://www.linuxquestions.org/questions/linux-newbie-8/kupdated-kswapd-159728/)

chii-chan 03-19-2004 04:23 AM
kupdated? kswapd?
 
Hi

What are these processes: kupdated and kswapd. Are they related to kde?

mightymouse 03-19-2004 04:54 AM
No, they're for the kernel. I'm not sure what they do exactly; google has the answers :)

chii-chan 03-19-2004 05:30 AM
I've tried that though. Look confusing. Give me some light;)

Actually I got problem with these things especially kupdated. Sometimes (about every 10 minutes, it used up my cpu (100%), slow down mouse pointer, and sometimes even disconnect my modem! Can I disable this thing? I have problem with this only with my slow processor though (1.3Ghz Duron). I don't seem to have problem with my 2400XP Athlon even with kupdated running.

chii-chan 03-19-2004 08:45 AM
I recompile the kernel, include all IDE chipsets and no more problems! This is the answer (somewhere in 100th page of google search result):

Quote:
Problem:
When using the disk kupdated hogs the cpu, making the system slow to a crawl. The mouse stops responding for several seconds at a time. Serial comm gives errors like "/dev/ttyS0: 1 input overrun(s)".
Cause:
Slow IDE throughput due to unsupported chipset. Run 'hdparm -t /dev/hda' to make sure (it will be really low, around 2-6mb/s)
Solution:
Compile a kernel that supports your IDE chipset (just enable them all).
Reason:
<sholom> koala_man: Btw, the 'reason' part for the 'kupdated hogs CPU because of disk usage' thing is because the system runs in PIO mode, meaning the main CPU have to manage all reading and writing, rather than letting the chipset use busmastering.

CovertCow 04-03-2004 08:58 PM
Quote:
Originally posted by chii-chan
I recompile the kernel, include all IDE chipsets and no more problems! This is the answer (somewhere in 100th page of google search result):
I want to say a big thank you for this advice (it worked for me). I also wanted to mention that it is important not to use modules. I would recommend that you find out what chipset your motherboard has and then only enable that kernel driver (smaller the kernel the better is what I've always heard).

Another note: you can use hdparm -d /dev/hd* (where * is the device letter) to check on whether or not dma was enabled successfully.

chii-chan 04-04-2004 09:25 PM
;)


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