lkml.org 
[lkml]   [2003]   [Sep]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH] 2.6 workaround for Athlon/Opteron prefetch errata
From
Date
On Iau, 2003-09-11 at 14:54, Linus Torvalds wrote:
> This patch is fragile and looks pointless.
>
> What's wrong with the current status quo that just says "Athlon prefetch
> is broken"?

Firstly performance, secondly user space exceptions. We work around lots
of other broken CPU things this one triggers a path that only matters on
Athlon.

There is *one* change needed. We shouldnt call is_prefetch unless the
current CPU is an Athlon. That way its a performance improvement for
PIV, and Athlon in general, fixes the bug and causes no fancy athlon
fixup code for non AMD processors.

Alan

-
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: 2005-03-22 13:48    [W:0.083 / U:0.316 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site