lkml.org 
[lkml]   [2012]   [Jun]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: PATCH] Use -mpreferred-stack-boundary=3 on x86-64 if supported
From
Date
To keep gcc from paddong the stack to maintain a nonexistent alignment.

Andi Kleen <andi@firstfloor.org> wrote:

>> This patch uses -mpreferred-stack-boundary=3 on x86-64 if it is
>supported.
>> I have been running 3.4 kernel compiled with this option for weeks.
>
>But why?
>
>All the SSE code in the kernel should adjust manually. And the other
>code doesn't need it.
>
>Besides the entry points do not guarantee alignment.
>
>For the kernel it would be probably more useful to have a attribute
>per function that forces alignment.
>
>-Andi
>--
>ak@linux.intel.com -- Speaking for myself only.

--
Sent from my mobile phone. Please excuse brevity and lack of formatting.


\
 
 \ /
  Last update: 2012-06-23 19:01    [W:0.046 / U:0.408 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site