linux-kernel - Re: Issues with capability bits and meta-data in kdbus

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Message-ID: <20150424151453.GA22180@dellaz>
Date:	Fri, 24 Apr 2015 17:14:53 +0200
From:	Michele Curti <michele.curti@...il.com>
To:	Olaf Hering <olaf@...fle.de>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Havoc Pennington <hp@...ox.com>,
	Austin S Hemmelgarn <ahferroin7@...il.com>,
	Andy Lutomirski <luto@...capital.net>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Arnd Bergmann <arnd@...db.de>,
	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
	Tom Gundersen <teg@...m.no>, Jiri Kosina <jkosina@...e.cz>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Daniel Mack <daniel@...que.org>,
	David Herrmann <dh.herrmann@...il.com>,
	Djalal Harouni <tixxdz@...ndz.org>
Subject: Re: Issues with capability bits and meta-data in kdbus

On Fri, Apr 24, 2015 at 05:02:32PM +0200, Olaf Hering wrote:
> On Fri, Apr 24, Michele Curti wrote:
> 
> > http://www.barrgroup.com/Embedded-Systems/How-To/Big-Endian-Little-Endian
> > "Serious run-time performance penalties occur when using TCP/IP on a little
> > endian processor."
> 
> This URL lacks the numbers to proof such claim.
> 

?

It may be negligible compared to the whole stack operations, but swapping 
bytes require more instructions that not swapping bytes.

Michele

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