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

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Message-ID: <Pine.LNX.4.58.0706241149380.6072@gandalf.stny.rr.com>
Date:	Sun, 24 Jun 2007 11:52:16 -0400 (EDT)
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Jonathan Corbet <corbet@....net>
cc:	Ingo Molnar <mingo@...e.hu>, LKML <linux-kernel@...r.kernel.org>,
	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,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [RFC PATCH 0/6] Convert all tasklets to workqueues 


On Sun, 24 Jun 2007, Jonathan Corbet wrote:
>
> The cafe_ccic (OLPC) camera driver uses a tasklet to move frames out of
> the DMA buffers in the streaming I/O path.  With this change in place,
> I'd worry that the possibility of dropping frames would increase,
> especially considering that (1) this is running on OLPC hardware, and
> (2) there is typically a streaming video application running in user
> space.
>
> Obviously some testing is called for here.  I will make an attempt to do
> that testing, but the next few weeks involve some insane travel which
> will make that hard.  Stay tuned.
>

Jon,

Thanks for pointing this driver out. I'd greatly appreciate any report
you give us regarding the effect of having the tasklet as a thread.

-- Steve

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