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Bug#681767: linux-image-3.2.0-3-rt-amd64: irq/23-eth0 high load



On Mon, 2012-07-16 at 10:48 +0000, Yevgeny Kosarhevsky wrote:
> Package: src
> Version: 3.2.21-3
> Severity: critical
> Justification: causes serious data loss

What data?

> Dear Maintainer,
> I get a heavy load on irq/23-eth0:
>  1086 root     -51   0     0    0    0 S   2.0  0.0   0:31.04 irq/23-eth0                                                           

I don't think 2% CPU time is a 'heavy load'.

> This is only occured after upgrading from 2.6.32 kernel.
> The LA was 0.00 on previous kernel, now it's 1.44 
[...]

But you are not comparing like with like.  On a real-time kernel, IRQ
handlers are scheduled as tasks and are accounted in the load average.
On a standard kernel as you were running before, IRQ handlers are
accounted separately.

So, is there really a problem here?  Did you actually mean to install a
real-time kernel?

Ben.

-- 
Ben Hutchings
The most exhausting thing in life is being insincere. - Anne Morrow Lindberg

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