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ksoftirqd eats 100% cpu :-(

parisc-linux Tilo Riemer 3 participants 5 messages Oct 7, 2002 – Oct 8, 2002

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#0 lore raw

Hello list,

I use Debian 3.0 on an HP9000/710. Almost all works fine, but the ksoftirqd eats all cpu time. I read that it's a bug in the kernel. Is there a patch for fixing this problem?

Best regards, Tilo

#1 lore raw
Quoted 3 lines · Tilo Riemer

Hello list,

I use Debian 3.0 on an HP9000/710. Almost all works fine, but the ksoftirqd eats all cpu time. I read that it's a bug in the kernel. Is there a patch for fixing this problem?

It's a well known bug. on 7x0 and 7x5 boxes.

Maybe we should add a faq entry ?

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Thibaut VARENE
PA/Linux ESIEE Team
http://pateam.esiee.fr/
#2 lore raw
Quoted 8 lines · Thibaut VARENE
Quoted 5 lines · Tilo Riemer

Hello list,

I use Debian 3.0 on an HP9000/710. Almost all works fine, but the ksoftirqd eats all cpu time. I read that it's a bug in the kernel. Is there a patch for fixing this problem?

It's a well known bug. on 7x0 and 7x5 boxes.

It's a bug/feature related to the HIL drivers.
Since we have to poll the HIL ports the whole time the bunch of running timers increase the ksoftirqd load a lot.

Quoted 1 line

Maybe we should add a faq entry ?

This would be great.

Helge

#3 lore raw

Hello,

Quoted 6 lines
Quoted 4 lines
Quoted 3 lines

I use Debian 3.0 on an HP9000/710. Almost all works fine, but the ksoftirqd eats all cpu time. I read that it's a bug in the kernel. Is there a patch for fixing this problem?

It's a bug/feature related to the HIL drivers. Since we have to poll the HIL ports the whole time the bunch of running timers increase the ksoftirqd load a lot.

Okay, if it's a feature and not a bug I can sleep without worries ;-)

Best regards and thanks, Tilo

#4 lore raw
In reply to Helge Deller

Hello list,

Quoted 6 lines
Quoted 3 lines
Quoted 3 lines

I use Debian 3.0 on an HP9000/710. Almost all works fine, but the ksoftirqd eats all cpu time. I read that it's a bug in the kernel. Is there a patch for fixing this problem?

It's a bug/feature related to the HIL drivers. Since we have to poll the HIL ports the whole time the bunch of running timers increase the ksoftirqd load a lot.

Btw, if the mouse and keyboard are attached, the ksoftirqd needs about 50-60%, without mouse and keyboard, it needs 100%.

Best regards, Tilo