lkml.org 
[lkml]   [2007]   [Nov]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC] Documentation about unaligned memory access
Daniel Drake wrote:
> Being spoilt by the luxuries of i386/x86_64 I've never really had a good
> grasp on unaligned memory access problems on other architectures and decided
> it was time to figure it out. As a result I've written this documentation
> which I plan to submit for inclusion as
> Documentation/unaligned_memory_access.txt
>
> Before I do so, any comments on the following?

...

> You may be wondering why you have never seen these problems on your own
> architecture. Some architectures (such as i386 and x86_64) do not have this
> limitation, but nevertheless it is important for you to write portable code
> that works everywhere.

Also, x86 doesn't prohibit unaligned accesses, but I believe they have a
significant performance cost and are best avoided where possible.

--
Robert Hancock Saskatoon, SK, Canada
To email, remove "nospam" from hancockr@nospamshaw.ca
Home Page: http://www.roberthancock.com/

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-11-23 02:27    [from the cache]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and my Meterkast|Read the blog