lkml.org 
[lkml]   [2008]   [Apr]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 1/1] x86: fix text_poke
Ingo Molnar wrote:
>
> text_poke() itself only applies/unapplies the LOCK prefix - a single
> byte. We shouldnt be doing that at all: the cost of LOCK is
> insignificant (a few cycles) and most systems are SMP anyway.
>

Alas, on older CPUs the cost of LOCK can be massive. The question is
how much we really care - the embedded people (who would definitely be
affected) will simply build UP kernels, and this only affects booting
SMP kernels on UP.

-hpa


\
 
 \ /
  Last update: 2008-04-25 18:07    [W:0.220 / U:0.648 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site