linux-kernel - Re: can: c_can: Reduce interrupt load by 50%

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Message-ID: <alpine.DEB.2.02.1403182142390.18573@ionos.tec.linutronix.de>
Date:	Tue, 18 Mar 2014 21:43:39 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Joe Perches <joe@...ches.com>
cc:	LKML <linux-kernel@...r.kernel.org>,
	Wolfgang Grandegger <wg@...ndegger.com>,
	Marc Kleine-Budde <mkl@...gutronix.de>,
	Markus Pargmann <mpa@...gutronix.de>,
	Benedikt Spranger <b.spranger@...utronix.de>,
	linux-can@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: can: c_can: Reduce interrupt load by 50%

On Tue, 18 Mar 2014, Joe Perches wrote:

> On Tue, 2014-03-18 at 21:18 +0100, Thomas Gleixner wrote:
> > The driver handles pointlessly TWO interrupts per packet. The reason
> > is that it enables the status interrupt which fires for each rx and tx
> > packet and it enables the per message object interrupts as well.
> 
> Are the message object interrupts a possible workaround
> for any defective hardware?

Nope. I already explained what they are for, but you snipped that
part.
 
> > performance improment
> 
> Now that the code's not being written by amateurs?

You found a typo. Great, you can keep it!
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