Re: [PATCH 1/3] Separate IRQ-stacks from 4K-stacks option

From: Timothy Miller
Date: Wed Oct 20 2004 - 13:31:24 EST




Lee Revell wrote:


The IDE I/O completion in hardirq context means that one can run for
almost 3ms. Apparently at OLS it was decided that the target for
desktop responsiveness was 1ms. So this is a real problem.

What is happening that takes 3ms, and why can't it be broken up?



http://lkml.org/lkml/2004/7/24/26

Ah, I see. Lots of cache misses.




What exactly do you mean by "draconian"?

In this case, I mean extremely harsh and restrictive. Usually, it means "excessively harsh", but in this case, I mean that in a good way. :)



Heh, I know what the word means, I was asking what the specific rules
are that could be considered as such.



I believe using the word 'draconian' was a poor choice on my part. Maybe "strictly bounded with no exceptions" would be a better way of expressing it.

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