Messages in this thread | | | Date | Fri, 29 Jun 2007 20:34:09 +0400 | From | Alexey Kuznetsov <> | Subject | Re: [RFC PATCH 0/6] Convert all tasklets to workqueues |
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Hello!
> What changed?
softirq remains raised for such tasklet. Old times softirq was processed once per invocation, in schedule and on syscall exit and this was relatively harmless. Since softirqs are very weakly moderated, it results in strong cpu hogging.
> And can it be fixed?
With current tasklets this can be fixed only introducing additional synchronization cost to tasklet schedule. Not good. Better to fix caller.
If Ingo knows about this, I guess it is already fixed in -rt tasklet or can be fixed. They are really flexible and extensible: -rt tasklet cost is so high, that even another thousand of cycles will remain unnnoticed. :-)
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