netdev - Re: can: c_can: Reduce interrupt load by 50%

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

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!
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html