Re: [RFC PATCH 0/6] Convert all tasklets to workqueues

[Arjan van de Ven <arjan@infradead.org>]

> 
> This is stated on the assumption that pretty much all performance
> critical tasklets have been removed (although Christoph just mentioned
> megaraid_sas, but after I made this statement).
> 
> We've been running tasklets as threads in the -rt kernel for some time
> now, and that hasn't bothered us.
> 
> The problem with tasklets is that they still don't provide guaranteed
> performance. They can still be pushed off to ksoftirqd on a busy system.
> But having *all* tasklets as they are today, keeps them at a higher
> priority then any process in the system.


don't get me wrong, I'm not against this conversion, just it needs to be
measured in detail... or preferably done step by step so that the
performance guys can undo one piece at a time until they find a guilty
party ;)

-- 
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