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

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Message-Id: <1182522309.2672.11.camel@laptopd505.fenrus.org>
Date:	Fri, 22 Jun 2007 07:25:09 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Christoph Hellwig <hch@...radead.org>,
	john stultz <johnstul@...ibm.com>,
	Oleg Nesterov <oleg@...sign.ru>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Dipankar Sarma <dipankar@...ibm.com>,
	"David S. Miller" <davem@...emloft.net>, matthew.wilcox@...com,
	kuznet@....inr.ac.ru
Subject: Re: [RFC PATCH 0/6] Convert all tasklets to workqueues


> The most part, tasklets today are not used for time critical functions.
> Running tasklets in thread context is not harmful to performance of
> the overall system. 

That is a bold statement...

> But running them in interrupt context is, since
> they increase the overall latency for high priority tasks.


.... since by moving this to process context you do add latency between
the hardirq and the tasklet, and I can see that having performance
impact easily.


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